декабрь-январь 2012 - RISAT-1, Venta-1, Pratham - PSLV-C19 (XL) - ПО
http://timesofindia.indiatimes.com/india/PSLV-launch-successful-four-satellites-in-orbit/articleshow/10327098.cms
ЦитироватьIn December, PSLV-C19 will launch ISRO's first completely indigenous microwave remote sensing satellite (RISAT-1), while PSLV-C20 will launch an environment monitoring SARAL satellite, developed by India and France, in March.[/size]
http://forum.nasaspaceflight.com/index.php?topic=1173.msg825737#msg825737
ЦитироватьRISAT-1 (PSLV C19) launch will be in Jan 2012 (As per ISRO Chairman RadhaKrishnan during his visit to National Remote Sensing Centre, NRSC, at Shadnagar near Hyderabad). Published in the regional language news paper - Telugu (Refer (http://eenadu.net/Homeinner.aspx?qry=break46))
~Prasad
http://space.skyrocket.de/doc_sdat/risat-1.htm
ЦитироватьRISAT 1[/size]
(https://img.novosti-kosmonavtiki.ru/7293.jpg)
RISAT 1 [ISRO]
RISAT 1 (Radar Imaging Satellite 1) is the first satellite imaging mission of ISRO using an active C-band SAR (Synthetic Aperture Radar) imager. The objective of the RISAT mission is to use the all-weather as well as the day-and-night SAR observation capability in applications such as agriculture, forestry, soil moisture, geology, sea ice, coastal monitoring, object identification, and flood monitoring.
RISAT 1 is developed, manufactured and integrated by ISRO. The 3-axis stabilized spacecraft bus consists of a hexagonal prism shape build around a central cylinder. Most of the spacecraft subsystems and the payload are integrated in the prism structure and the central cylinder. The solar panels and some subsystems are mounted on the cube-shaped section of the spacecraft.
Nation: India
Type / Application: Earth Observing, radar
Operator: ISRO
Contractors: ISRO
Equipment: C-Band SAR
Configuration:
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime:
Mass: 1850 kg
Orbit: 609 km
http://www.dnaindia.com/india/report_launch-of-risat-1-to-boost-countrys-recce-capabilities_1615748
ЦитироватьLaunch of Risat-1 to boost country's recce capabilities[/size]
Published: Tuesday, Nov 22, 2011, 8:00 IST
By Hemanth CS | Place: Bangalore | Agency: DNA
The Radar Imaging Satellite-1 (RISAT-1), second in the series of India's radar imaging reconnaissance satellites, will be Indian Space Research Organisation's (Isro's) first launch next year.
RISAT-1, which will have the capability of imaging during day and night and in all-weather conditions including fog and haze, will be launched in January 2012 from the Satish Dhawan Space Centre (SDSC) in Sriharikota, sources in the space agency told DNA.
The satellite, which will be launched aboard Polar Satellite Launch Vehicle C-19 (PSLVC-19), will carry a C-band Synthetic Aperture Radar (SAR) and can be used for observational purposes for national security and environmental applications.
According to Isro, SAR is an active radar sensor, operating in the microwave region of electromagnetic spectrum that provides target parameters such as dielectric constant, surface roughness, geometry.
The SAR payload is based on an active phased array technology using Transmit/Receive (TR) modules, which would provide necessary electronic agility for achieving the multi-mode capability, providing spatial resolutions of 1 m to 50 m, and a swath of 10 to 240 km caters to different applications.
Isro scientists said RISAT-1 will follow RISAT-2 in the sequence of the country's radar imaging reconnaissance satellites.Although ISRO has denied that the RISAT-2 (launched in April 2009) falls under the spy satellite category, it is rumoured that the satellite is being used for surveillance on areas on the western borders of India.
The pre-launch activities of RISAT-2 in 2009 had aroused a lot of curiosity with media reports stating that it was accelerated following the 26/11 Mumbai terror attacks, with the help of the Israeli Aerospace Industries.
Apart from the RISAT satellites, Indian defence forces under the Integrated Space Command have been contemplating having dedicated satellites for quite some time now.
IAF chief NAK Browne, during his recent visit to Bangalore, had given top priority to having such dedicated satellites for all the three services under the Indian defence.[/size]
http://ibnlive.in.com/news/isro-aims-at-45-to-50-launches/212988-60-123.html
ЦитироватьIn March 2012, the ISRO will launch a microwave remote sensing satellite which will be useful for the farm sector as well as disaster management. Cloud cover will not be a problem for this satellite, which gives it an edge over conventional satellites.[/size]
http://www.dnaindia.com/scitech/report_risat-1-to-be-launched-anytime-from-march-15_1639171
ЦитироватьRISAT-1 to be launched anytime from March 15[/size]
Published: Wednesday, Jan 18, 2012, 16:12 IST
Place: Bangalore | Agency: PTI
Indigenously developed remote sensing satellite RISAT-1, which can take images of the Earth in all weather conditions, would be launched by space agency ISRO anytime from March 15.
The 1850 kg RISAT-1, earlier slated for launch last year onboard PSLV-C19, would be a major milestone for the country and a boon for regions perennially under cloud cover.
"The launch of microwave remote sensing RISAT-1 is slated anytime from March 15," ISRO Chairman K Radhakrishnan told reporters on the sidelines of an event here organised by the Indian Institute of Science.
Besides use in the agriculture sector, the satellite's all weather capability to take images of the Earth could also be used to keep an eye on the country's borders round-the-clock and to help in anti-terrorist and anti-infiltration operations, he said.[/size]
http://ibnlive.in.com/news/isro-focused-on-risat1-launch/226788-60-115.html
ЦитироватьKarnataka | Posted on Feb 02, 2012 at 10:31am IST
ISRO focused on RISAT-1 launch[/size]
indianexpress Express News Service , The New Indian Express
BANGALORE: It's business hours as usual for the Indian Space Research Organisation (ISRO). The message amidst the mess, is to stay focused on immediate missions and not the madness orbiting them, thanks to the Devas-Antrix row.
http://www.dnaindia.com/india/report_isro-row-not-affected-space-programmes-k-radhakrishnan_1649353
Цитировать"As far as ISRO is concerned, I don't see any problems", Radhakrishnan said, adding, ISRO is now working on the launch of radar imaging satellite in the last week of March, as well as the ground-test of cryogenic engine.[/size]
http://ibnlive.in.com/news/tn-woman-scientist-to-head-isro-mission/234021-60-118.html
ЦитироватьTamil Nadu | Updated Feb 28, 2012 at 09:55am IST
TN woman scientist to head ISRO mission[/size]
S M Arun
COIMBATORE: Within a few weeks, Indian Space Research Organisation (ISRO) is slated to launch a microwave remote sensing satellite, RISAT-1 (Radar Imaging Satellite). After the space vehicle enters its designated orbit, you can expect ISRO chairman K Radhakrishnan to grin from ear to ear. Sharing the honours will be a little-known scientist, Valarmathi, who hails from Tamil Nadu. In fact, she is the project director of RISAT-1, the first woman from this State to head such a project.
Earlier, senior scientist R N Tyagi was the project director of RISAT.
A 1981-batch engineer from Government College of Technology in Coimbatore, Valarmathi took charge following the retirement of Tyagi. "I am a 1981-batch engineer from the Department of Electronics and Communication Engineering, Government College of Technology in Coimbatore," she told Express over phone from ISRO Satellite Centre in Bangalore. However, she declined to entertain further questions. Recently, Radhakrishnan had said that RISAT-1 could be launched anytime after March 15.
In fact, Valarmathi is the second woman scientist in India's space history to head such a mission.
T K Anuradha was the first woman scientist to head a space mission when GSAT-12 was launched on July 15, 2011.
Radar Imaging Satellite (RISAT-1) is a microwave remote sensing satellite that has a Synthetic Aperture Radar and weighs about 1,850 kg. It is slated for launch by Polar Satellite Launch Vehicle- C19 (XL) this year into a 536 km orbit, the Indian Space Research Organisation website said[/size].
http://www.thehansindia.info/News/Article.asp?category=1&subCategory=2&ContentId=42721
ЦитироватьIsro satellite launch plans may be delayed [/size]
Sullurpet (Nellore): In the wake of annulment of $300 million Antrix-Devas deal and subsequent controversy over the transparency of the functioning of Indian Space Research Organisation (Isro), the launch of several satellites is getting delayed.
Isro chairman Radhakrishnan has announced that the launch of the microwave remote sensing satellite RISAT-1, which was scheduled to go up into orbit with the help of Polar Satellite Launch Vehicle C-19 by March this year, is likely to be delayed, according to sources at SHAR.[/size]
http://forum.nasaspaceflight.com/index.php?topic=1173.msg871763#msg871763
ЦитироватьSome more bad news...
RISAT-1 mission is not scheduled for March-2012. It may slip further to April or May. Some sources have told that the vehicle is waiting for the satellite to arrive from ISAC center at Bangalore.
Also ISRO seems to be plagued with internal revolt by a section of scientists loyal to former chairman Mr. Madhavan Nair.[/size]
http://forum.nasaspaceflight.com/index.php?topic=27238.msg871835#msg871835
ЦитироватьAFAIU launch date will be reviewed on April 15
(source (http://www.andhrabhoomi.net/node/12058) in Telugu)[/size]
Venta-1 - это понятно, первый латвийский спутник
Pratham
'Pratham' has a Four-fold Mission Statement:ЦитироватьEnabling students and faculty to gain knowledge and experience in the field of Satellite and Space technology.
Empowering the Satellite Team with the skills to develop the Satellite through various phases of Design, Analysis, Fabrication and Testing until the Flight Model is made.
Launching the satellite into orbit and measuring Total Electron Count of the Ionosphere.
Involving students from other universities in our Satellite mission by building ground stations in their universities.
For the relevance of our satellite to the student community, we will be transmitting satellite data when the satellite passes over India so that any interested university with a small ground station will not only be able to detect the beacon signal from our satellite but will also be able to measure TEC above their ground station. This is proposed to spread awareness among the student community about this exciting field.
...........
http://www.aero.iitb.ac.in/pratham/mission.php
'Pratham', India's first do-it-yourself satellite
http://www.youtube.com/watch?v=S0ghV-FL0t0
IIT Bombay Student Satellite ProjectЦитироватьIntegration of Flight Model going on!
(https://img.novosti-kosmonavtiki.ru/65613.jpg) (http://www.aero.iitb.ac.in/pratham/images/IITBSATGRP.JPG)
IITBombayThe IIT Bombay Student Satellite Project is a landmark project taken up by IIT Bombay students. The objective of this project is to make IIT Bombay a respected centre for advancement in Satellite and Space Technology in the world. The project aims at launching at least 5 satellites within the next few years. These Satellites could be test-beds for new technology that is being developed in the institute and also a method for space qualification. Click here to view enlarged image
'Pratham' is the first satellite under this project. The plan is to build a fully functional microsatellite in less than three years which would then be launched by Indian Space Research Organisation (ISRO). This is entirely a student initiative with mentorship provided by ISRO scientists and IIT Bombay Faculty. The satellite will fit in a 30*30*30 cm cube and will weigh less than 15 kg. Click here to view the Mission Statement of 'Pratham'.
(https://img.novosti-kosmonavtiki.ru/310037.jpg)
Weight: 10 kgs
Size: 260mm X 260mm X 260mm
Payload: Measuring TEC
Orbit: 10:30 polar sun-synchronous, 817km altitude
Downlink: 437.455MHz and 145.98MHz
Uplink at 437.455 MHz
Mission Life: 4 months
Exploded view of the satellite is shown below.
http://www.aero.iitb.ac.in/pratham/
Постер (очень большая и долгозагружающаяся картинка): http://www.aero.iitb.ac.in/pratham/images/Pratham3.png
Лог почему-то не обновляется уже месяцев 8
Log Bookhttp://www.aero.iitb.ac.in/pratham/integrationlog.php
Цитировать........................
The IITB Ground Station
(http://s017.radikal.ru/i406/1203/c6/86c86d6aad69.jpg) (http://s48.radikal.ru/i120/1203/80/db17dcfbbf61.jpg) (http://s019.radikal.ru/i627/1203/e0/1f5d20be67bf.jpg) (http://s019.radikal.ru/i610/1203/9f/2a307d335f10.jpg)
(http://s019.radikal.ru/i639/1203/77/eb7c97013570.jpg) (http://s019.radikal.ru/i644/1203/5f/a5ad4a37eec5.jpg)
(https://img.novosti-kosmonavtiki.ru/65614.jpg)
(https://img.novosti-kosmonavtiki.ru/65615.jpg)
Не факт, что там вообще что-нибудь кроме Risat-1 будет.
http://economictimes.indiatimes.com/news/politics/nation/indias-spy-satellite-risat-1-to-be-launched-in-april/articleshow/12247051.cms
Цитировать13 Mar, 2012, 03.21PM IST, IANS
India's spy satellite Risat-1 to be launched in April[/size]
CHENNAI: A wholly Indian-built spy/surveillance satellite - Radar Imaging Satellite (Risat-1) - that can see through clouds and fog and has very high- resolution imaging is slated for launch in April, a senior official of the Indian space agency has said.
An official of the Indian Space Research Organisation (ISRO) said thorough tests were being done on the Risat-1. "The Risat-1 is put to thermal vacuum test (a test to check the satellite's functioning in space environment). It is a complex microwave satellite being built for the first time in India.
The satellite is expected to be launched in April," the senior official told IANS, not wishing to be named because of the organisational rules.
In earlier satellites, one major component, the synthetic aperture radar (SAR) was imported, but in Risat-1 that has also been developed in India.
He said Risat-1 is the first such satellite being built by India and is a bit complex compared to other remote sensing/earth observation satellites built and sent up earlier.
According to ISRO officials, Risat-1 at 1,850 kg is the heaviest microwave satellite to be built by India.
The satellite would be used for disaster prediction and agriculture forestry, and the high resolution pictures and microwave imaging could also be used for defence purposes.
Risat-1 will have all weather, day and night imaging capability.
The satellite's synthetic aperture radar can acquire data at C-band.
ISRO Chairman K. Radhakrishnan had said last October that the space agency would launch two more satellites - Risat-1 and SARAL - before 2011-end. But that did not happen. He also said two more satellites - AstroSat and Aditya - will be launched in 2012-13.
Remote sensing satellites send back pictures and other data for use. India has the largest constellation of remote sensing satellites in the world providing imagery in a variety of spatial resolutions, from more than a metre ranging up to 500 metres, and is a major player in vending such data in the global market.
In 2009, ISRO had launched 300 kg Risat-2 with an Israeli built SAR enabling earth observation on all weather, day and night conditions. The satellite can look through clouds and fog.
With 11 remote sensing/earth observation satellites orbiting in the space, India is a world leader in the remote sensing data market. The 11 satellites are TES, Resourcesat 1, Cartosat 1, 2, 2A and 2B, IMS 1, Risat-2, Oceansat 2, Resourcesat-2, Megha-Tropiques.
According to ISRO officials, the rocket that would sling Risat-1 will be the Polar Satellite Launch Vehicle's (PSLV) upgraded variant called PSLV-XL.
The rocket would weigh around 320 tonnes at lift-off and will be the third such expendable rocket to be sent up by ISRO, and first time to launch a remote sensing satellite.
ISRO had used the PSLV-XL variant (rocket with extended strap-on motors than what the base model has) for its moon mission (Chandrayaan-1) in 2008 and for launching its communication satellite GSAT-12 in 2011.
The PSLV is a four-stage (engine) rocket powered by solid and liquid propellants alternatively. The first and third stages are fired by solid propellant and the second and fourth stages are fired by liquid propellant.
ISRO has developed three PSLV variants. The first is the standard variant weighing around 290 tonnes with six strap-on motors measuring 11.3 metres with a fuel capacity of nine tonnes.
The other two rocket variants are the PSLV Core Alone without the six strap-on motors and PSLV-XL with longer strap-on motors measuring 13.5 metres having a fuel capacity of 12 tonnes of solid fuel.[/size]
http://www.bernama.com/bernama/v6/newsindex.php?id=652053
ЦитироватьMarch 14, 2012 10:29 AM
India To Launch Home-built RISAT-1 Next Month[/size]
BANGALORE, March 14 (Bernama) -- India is expected to launch next month an indigenously designed and developed satellite that has the unique capability of imaging during day and night and in all weather conditions.
"The Radar Imaging Satellite (RISAT-1) is likely to be launched in the second half of April from Sriharikota space port," an Indian Space Research Organisation (ISRO) official told Press Trust of India (PTI) here on Tuesday.
The spacecraft, country's first microwave remote sensing satellite, was originally scheduled to be launched this month but the ISRO row, the fallout of the punitive action against four former space scientists for their role in the Antrix-Devas deal, delayed the preparations.
Nearly two years ago, India launched a Radar Imaging Satellite (RISAT-2) with all weather capability and ability to penetrate through clouds but it was realised in association with Israel Aerospace Industries.
Bangalore-headquartered ISRO said RISAT-2 has enhanced the country's capability in the management of disasters.
RISAT-1, weighing around 1850 kg, is slated for launch by ISRO's workhorse Polar Satellite Launch Vehicle (PSLV-C19 (XL)) into a 536 km orbit.
Besides use in the agriculture sector, RISAT-1 could also be used to keep round-the-clock vigil on the country's borders and help in anti-terrorist and anti-infiltration operations.
The satellite carries a C-band Synthetic Aperture Radar (SAR) payload, operating in a multi-polarisation and multi-resolution mode to provide images with coarse, fine and high spatial resolutions respectively.
-- BERNAMA[/size]
ЦитироватьНе факт, что там вообще что-нибудь кроме Risat-1 будет.
http://www.tvnet.lv/tehnologijas/zinatnes/415251-satelitu_venta1_varetu_palaist_zemes_orbita_vasaras_vidu
Гугль перевод:
ЦитироватьСпутник Venta-1 выйдет на околоземную орбиту в середине лета[/size]
LETA
16:37, 21. Март 2012 года
Первый латвийский спутник "Вента-1" может запустить на орбиту Земли в середине этого лета, с помощью русских ракет. Сегодня, встречаясь с журналистами, посол России Александр Вешняков сообщил в ходе визита в Вентспилсе Вентспилсской городской думы Айварс Лембергс ("Для Латвии и Вентспилса").
"Экономическое сотрудничество с Россией в Вентспилсе очень длинный и разнообразный. В основном, это, конечно, связаны с транзитом. [..] В России у нас есть сотрудничество в области науки, и мы видим большой потенциал для развития сотрудничества в целях развития. Кроме того, в настоящее время переговоры ведутся на первый латвийский спутников на орбиту вокруг Земли, с помощью русских ракет-носителей. Мы думаем, что сможем согласовать все условия, и теперь предсказывает, что это может быть в середине лета ", сообщил Лембергс.
Вешняков посетил сегодня Вентспилсский Международный радиоастрономической центра.
"Тогда я обратил свое внимание в России в июле прошлого года в Латвии подписали декларацию, которая направлена на обеспечение того, чтобы мы развиваем сотрудничество в области высоких технологий и науки. [..] Если это небольшой, но важный спутник проект будет успешным, то, вероятно, будет другой, больше ", сказал Вешняков. Как и Латвии с Россией могут быть и другие проекты сотрудничества в области науки, сказал посол.
Вешняков приветствовал Вентспилсской высшей школы и способность местных органов власти по привлечению средств из фондов Европейского Союза для организации и модернизации советской армии удалось в Вентспилсский Международный центр radioastonomijas инфраструктуры.
Как сообщалось в конце прошлого года индейцы спутников на полярную орбиту »(PSLV) ракеты-носителя начало, которое было запланировано на первый латвийский спутник" Вента-1 "и итальянский спутник" Maxvalier »запуск на орбиту, были приостановлены на неопределенный срок. Поэтому ищем альтернативы запуску спутника, сообщили агентству LETA в преддверии спутника "Venta-1" производства координатор Дана Reizniece-Ozola.
Venta-1 "будет готов, и не хотите ждать, так интенсивно ищут альтернативу", сказал Reizniece-Ozola. Наиболее реалистичным вариантом является русский РН "Космос". Обсуждение также был проведен с индийцами. Была также возможность запуска американского латвийский спутник РН "Falcon9", но плата за эту услугу будет слишком большой, заостренный Reizniece-Ozola.
Стремясь запустить спутник на орбиту "Venta-1", важен не только для начальных затрат, но и на орбите. Экваториальная орбита не действует, потому что это важно "Venta-1" пролетел над латвийским объяснил Reizniece-Ozola.
В конце прошлого года планируются другие индейцы полярной орбите ракет-носителей предоставлена возможность начать работать спутник, который весит четыре килограмма, а "Venta-1" весом 7,5 килограмма, он не подходит. "Мы решили не снижать" Venta-1 ", поскольку эти важные эксперименты -" подключи и работай "модуль и новый" LuxSpace "Автоматическая антенна системы идентификации", сказал Reizniece-Ozola.
Спутник "Venta-1" для морских Автоматическая идентификационная система реализации спутниковых систем, разработанных немецкими космических технологий компании "OHB-System AG». Проект предусматривает Бременского университета, но латвийская сторона Вентспилсской высшей школы и участвует в Вентспилсе технологический парк Высокий.
Бременского университета профессор и компании "OHB Technology AG» ученый Индулис Калниньш, который до 1989 года жил и работал в Латвии, сообщил, что спутник "Вента-1" ключ загрузки Автоматическая система идентификации получателя. Эта система позволяет в режиме реального времени информацию о движение судов по всему миру.
Отдельный модуль для спутника "Venta-1" станет шведская компания «MicroTec AAT», которые будут опробованы на использование американских военных технологий, разработанных "подключи и-Play", сообщил Смит.
Спутник "Venta-1" будет три наземных станций, которые получают сигналы. Основная земная станция будет Вентспилсский Международный центр радиоастрономической Ирбене, замена станций будет расположено в Бремене, Германия. Планируется, что в будущем будет третий земной станции в Италии, Южный Тироль.[/size]
Два небольших спутника не влезли? Все настолько впритык?
http://forum.nasaspaceflight.com/index.php?topic=27238.msg876959#msg876959
ЦитироватьЦитироватьЦитироватьTechnical descriptions of Risat-1:
http://www.scanex.ru/en/publications/pdf/publication50.pdf
https://directory.eoportal.org/get_announce.php?an_id=12429
Tentative launch date: April 21
(source (http://www.andhrabhoomi.net/node/15874) in Telugu)
A new NOTAM with revised dates:
ЦитироватьA0061/12 - DUE TO LAUNCHING OF POLAR SATELLITE VEHICLE (PSLV C-19) FROM INDIA (19 43.9N 080 14.2E) AND THE POSSIBILITY OF IMPACT [....]TEMPO DNG ZONE EST WI AN AREA BOUNDED BY FLW COORD: 333000S 0723000E, 333000S 0763000E, 373000S 0763000E, AND 373000E 0723000E. SL - UNL, DLY BTN 2345 TO 0200, 19 APR 23:45 2012 UNTIL 19 MAY 02:00 2012. CREATED: 29 MAR 11:52 2012
(http://s019.radikal.ru/i644/1203/5f/a79f6be858d6.jpg)
http://www.dnaindia.com/scitech/report_preparations-on-for-india-s-first-radar-imaging-satellite-launch_1670143
ЦитироватьPreparations on for India's first radar imaging satellite launch[/size]
Published: Sunday, Apr 1, 2012, 17:01 IST
Place: Bangalore | Agency: PTI
Preparations are underway for this month's launch of an indigenously designed and developed satellite that has the unique capability of imaging during day and night and in all weather conditions.
ISRO is looking at 'lucky April 20' for the blast-off from India's spaceport of Sriharikota.
RISAT-1, a Radar Imaging Satellite with the capability to take images of the earth during day and night as well as in cloudy conditions, is a first of its kind by India and has already reached the spaceport having been transported from here.
India had launched RISAT-2, which it bought from Israel for $110 million, on April 20, 2009, and Resourcesat-2 mission took place on the same day last year. Both were successful ventures.
"April 20 is a lucky day for us", an ISRO official told PTI here. After back-to-back failures of GSLV -- one with Russian engine and another with homegrown one --, this statement did not come as a surprise.
RISAT-1, weighing around 1850 kg, is slated for launch by ISRO's workhorse Polar Satellite Launch Vehicle (PSLV-C19 (XL)) into a 536km orbit.
The launch of the spacecraft, the country's first microwave remote sensing satellite, was put off by at least a couple of months following the ISRO row, the fallout of the punitive action against four former space scientists for their role in the Antrix-Devas deal, that delayed the preparations.
RISAT-2 with all weather capability and ability to penetrate through clouds was realised in association with Israel Aerospace Industries. RISAT-2, primarily a spy satellite, is being used solely for Defence applications, keeping an eye on the borders and the country's neighbourhood.
"This satellite (RISAT-2) can sharply focus on metallic objects", an ISRO official said.
"The RISAT-1 will be useful for monitoring of agriculture and water resources management, among other applications", said the official, who added that this satellite would not be used for defence applications as RISAT-2 is already doing that job.
RISAT-1 carries a C-band Synthetic Aperture Radar (SAR) payload, operating in a multi-polarisation and multi-resolution mode to provide images with coarse, fine and high spatial resolutions respectively.[/size]
India ready with all-weather imaging satellite: ISROЦитироватьIndia is set to launch an indigenous satellite with the "unique" capability to capture images in all-weather conditions that will facilitate agriculture and disaster management, ISRO said on Wednesday.
India currently depends on images from a Canadian satellite as domestic remote sensing spacecraft cannot take pictures of the ground during cloud cover.
After nearly 10 years of effort, Indian Space Research Organisation (ISRO) has developed -- with a lot of participation from Indian industries -- a microwave satellite that has the unique capability of imaging during day and night and in all weather conditions, it said.
"This (Radar Imaging Satellite or RISAT-1) is about 1,850 kg. So, this will be heaviest satellite lifted by a PSLV (Polar Satellite Launch Vehicle)," ISRO Chairman K Radhakrishnan told PTI here.
"It's most likely to be launched on April 26 at 5.45 am," he said. "It has taken about 10 years of efforts in developing this (RISAT-1)".
The approved cost of RISAT-1, including its development, is Rs378 crore, while Rs 120 crore has been spent to build the rocket (PSLV-C19), making it a Rs498-crore mission.
RISAT-1 is a "complex satellite", Radhakrishnan said.
The satellite would be particularly useful in Kharif season when cloud-covered atmosphere is frequent. Images taken from the spacecraft of agricultural crops would enable planners with regard to production estimation and forecast, the space agency said.
During floods, aerial pictures would give a clear idea on the affected region and water level. In addition, this satellite can even "penetrate" the ground and throw light on soil moisture up to a few centimeters, Radhakrishnan said.
RISAT-1 would be launched into a 536-km orbit by PSLV, which is India's workhorse rocket.
The satellite carries a C-band Synthetic Aperture Radar (SAR) payload, operating in a multi-polarisation and multi-resolution mode to provide images with coarse, fine and high spatial resolutions.
Radhakrishnan said ISRO had built two SARs in the past but these had been flown on aircraft.
http://www.dnaindia.com/india/report_india-ready-with-all-weather-imaging-satellite-isro_1671521
Спутник стоит ~ 76 млн долларов, ракета ~ 24 миллиона.
2012-04-04
Спрос на космические радиолокаторы растет ЦитироватьВ настоящее время в мире наблюдается рост интереса к спутникам радиолокационного наблюдения как со стороны гражданских, так и оборонных структур. Этому способствуют уникальные возможности для мониторинга территорий в самых сложных погодных условиях и условиях освещенности, а также заметный прогресс в области технологий создания и использования средств космической радиолокационной съемки сверхвысокого пространственного разрешения.
На 2012 год запланированы запуски не менее 6 спутников гражданского и военного назначения, оснащенных радиолокаторами с синтезированной апертурой (РСА): RISAT-1 (Индия), IGS-Radar-4 (Япония), NROL-25 (США), PAZ (Испания), HJ-1C (Китай) и Кондор-Э (Россия).
Один из перечисленных спутников – секретный американский аппарат видовой радарной разведки NROL-25 был выведен на орбиту в ночь с 3 на 4 апреля (в 23:12:57.278 UTC 3.4.2012) с помощью ракеты-носителя DELTA-IV с базы ВВС США Ванденберг (штат Калифорния). По данным пресы, новый спутник, получивший неофициальное наименование FIA Radar-2, является уже вторым в новой серии (первый КА FIA Radar-1 USA-215 был запущен 21.9.2010) и предназначен для замены выработавших ресурс радарных спутников видовой разведки типа «Лакросс» (Lacrosse). В отличие от предшественников, новые аппараты выводятся на сравнительно высокие орбиты высотой 1100 км и наклонением 123°, которые обеспечивают широкую пролосу съемки.
До конца апреля Индия планирует осуществить запуск нового радиолокационного аппарата ДЗЗ RISAT-1 собственной ракетой PSLV с полигона Шрихарикота. Спутник массой 1750 , созданный национальными космическими предприятиями агентства ISRO, будет оснащен радаром С-диапзона с пространственным разрешением от 2 м до 50 м.
В плане запусков – испанский спутник PAZ, созданный на основе успешного германского аппарата TerraSAR-X, китайский КА мониторинга ЧС HJ-1C (возможен также запуск секретных радарных спутников серии «Яогань») и российский КА «Кондор-Э», запуск которого откладывается на протяжении последних пяти лет.
Интересно отметить, что в Канаде в 2012-2013 финансовом году планируется сокращение государственных расходов на нужды Национального космического агентства на 7,9 млн долл. На этом фоне правительство страны намерено принять решение о дополнительной финансовой поддержке в размере 23 млн долл. деятельности Министерства природных ресурсов Канады в области создания новых наземных станций приема информации и развития системы обработки и распределения данных космической съемки с помощью спутников RADARSAT-1 и RADARSAT-2 – самой успешной на сегодняшний день коммерческой радиолокационной программы ДЗЗ.
В России первым сертифицированным центром приема данных со спутников RADARSAT стал ИТЦ «СКАНЭКС» (еще в 2004 г.). С декабря 2011 года компания является также официальным дистрибьютором в России продуктов спутника RADARSAT-2. Соответствующее соглашение было подписано с компанией-оператором спутника MDA Geospatial Services. В режиме прямого приема с данными RADARSAT-2 работают Центры космического мониторинга, созданные на основе технологии «УниСкан» в Самаре и Архангельске.
Независимость от облачности, времени суток и сезона дает возможность выполнения заказа на съемку с вероятностью, близкой к 100%. Заявка на съемку в экстренных случаях может быть подана за 29 часов до ее проведения для RADARSAT-1 и за 4-5 часов для RADARSAT-2, доставка данных пользователям по электронным каналам связи выполняется в течение нескольких часов после приема данных.
При подготовке материалы использованы данные из источников: indiawires.com, spaceflight101.com, spaceref.ca
http://www.scanex.ru/ru/news/News_Preview.asp?id=n20176172
http://www.nnit.ru/news/n118390/
ЦитироватьИндия готовит к запуску радиолокационный спутник ДЗЗ[/size]
06.04.2012 12:33
В Индии завершается подготовка к запуску нового спутника радиолокационной съемки Земли с высоким разрешением RISAT-1 (Radar Imaging SATellite). Спутник планируется вывести на полярную орбиту высотой 536 км и наклонением 97,8 град. до конца апреля. По утверждениям официальных представителей индийского космического агентства ISRO, впервые аппарат такого типа полностью произведен в Индии, включая основное оборудование полезной нагрузки — радиолокатор С-диапазона с синтезированием апертуры.
Предыдущий КА RISAT-2, запущенный в 2009 году, был разработан израильскими специалистами компании Israel Aerospace Industries и использовался преимущественно в военных целях. Размеры антенны радиолокационной системы RISAT-1, разработанной в центре прикладных космических исследований (SAC) ISRO, составляют 6х2 м. Радиолокатор будет функционировать на частоте 5,35 ГГц и позволит вести съемку земной поверхности в пяти различных режимах с разрешением 3-50 м. По сравнению с предыдущим спутником новый аппарат имеет более сложную конструкцию. Его масса — около 1850 кг, расчетный срок функционирования — 5 лет. Для запуска RISAT-1 с индийского ракетного полигона Шрихарикота планируется использовать модернизированную ракету-носитель PSLV-XL.
В отличие от своего предшественника спутник RISAT-1 предполагается использовать в интересах гражданских пользователей для контроля состояния сельскохозяйственных угодий, наблюдения районов стихийных бедствий и чрезвычайных ситуаций и решения других народнохозяйственных, научно-прикладных задач и коммерческих задач. Как отметил доктор Винай Дадхвал (Vinay Kumar Dadhwal), помощник директора национального центра дистанционного зондирования Земли ISRO, запуск и ввод в эксплуатацию RISAT-1 окажет существенное влияние на развитие рынка радиолокационных снимков. По его словам, индийские продукты ДЗЗ очень конкурентоспособны по цене, а недавнее открытие свободного доступа к некоторым архивам изображений, полученных с помощью систем AWiFS и LISS-III, еще больше будет способствовать росту популярности и востребованности данных космической съемки.
Редактор раздела: Алена Журавлева (info@mskit.ru)[/size]
http://timesofindia.indiatimes.com/india/New-ISRO-centre-to-control-spy-satellite-launch/articleshow/12595040.cms
ЦитироватьNew ISRO centre to control spy satellite launch[/size]
I ANS | Apr 9, 2012, 02.57PM IST
CHENNAI: The Indian rocket that will carry the 1,850 kg indigenous surveillance satellite - Radar Imaging Satellite (Risat-1) - to the skies this month will be controlled by the new mission control centre at Sriharikota, said a senior official of Indian space agency ISRO.
"The second mission control centre was inaugurated by President Pratibha Patil this January. The forthcoming rocket launch would be controlled and monitored from the new mission control centre. The rocket will fly off the first launch pad," S Satish, director (Publications and Public Relations), Indian Space Research Organisation (ISRO), said.
ISRO has its rocket port at Sriharikota in Andhra Pradesh around 80 km from here.
A senior ISRO official not wanting to be named said: "The new mission control centre is modern and has larger area to accommodate more space scientists, officials, VIPs and others."
ISRO officials said that the rocket Polar Satellite Launch Vehicle (PSLV) carrying remote sensing satellite Risat-1 is slated for launch from April 25-30.
"The exact launch date depends on the readiness of the rocket and satellite systems. Normally it will take 12-14 days for the rocket launch after carrying out all the tests," an ISRO official said.
ISRO officials said that Risat-1 systems are being checked at Sriharikota and it will be mated with the rocket later.
Once the satellite is loaded on to the rocket, the entire rocket systems would again be tested.
The PSLV rocket is in a fully assembled condition and is waiting for Risat-1, the heaviest microwave remote sensing satellite to be built by India. The satellite has all weather, day and night imaging capability.
The satellite would be used for disaster prediction and agriculture forestry, and the high resolution pictures and microwave imaging could also be used for defence purposes.
The satellite's synthetic aperture radar (SAR) can acquire data at C-band. In 2009, ISRO had launched 300 kg Risat-2 with Israeli built SAR enabling earth observation in all weather, day and night conditions.
Remote sensing satellites send back pictures and other data for use. India has the largest constellation of remote sensing satellites in the world providing imagery in a variety of spatial resolutions, from more than a metre ranging up to 500 metres, and is a major player in vending such data in the global market.
According to ISRO officials, the rocket that would sling Risat-1 would be PSLV's upgraded variant called PSLV-XL.
The rocket would weigh around 320 tonnes at lift-off and would be the third such expendable rocket to be sent up by ISRO.[/size]
http://www.spaceflightnow.com/tracking/index.html
ЦитироватьApril 27/28 PSLV • RISAT 1
Launch time: 0015 GMT on 28th (8:15 p.m. EDT on 27th)
Launch site: Satish Dhawan Space Center, Sriharikota, India
ISRO Annual Report 2012
http://www.isro.org/pdf/AnnuaReport2012.pdf
(http://s019.radikal.ru/i602/1204/4a/423ba76727ed.png)
RISAT-1 all set for launch at SriharikotaЦитировать(http://www.thehindu.com/multimedia/dynamic/01061/TH23_RISAT_ONE__1061391f.jpg)
RISAT-1 undergoing prelaunch tests in the clean room at the Satish Dhawan Space Centre in Sriharikota. Photo Courtesy : ISRO
Things are getting set for the launch of India's Radar Imaging Satellite (RISAT-1) from the spaceport at Sriharikota at 5.45 a.m. on Thursday. The four stages of the Polar Satellite Launch Vehicle (PSLV-XL) have been stacked up at the first launch-pad built on the beachside on the Sriharikota island and the satellite is married up with the vehicle. The 71-hour countdown for the lift-off will begin at 6.45 a.m. on Monday. The RISAT-1 is essentially a remote-sensing satellite.
The RISAT-1, which has been ten years in the making, will be the Indian Space Research Organisation's (ISRO) first radar-imaging satellite. An ISRO satellite specialist said: "Radar imaging is a very complex technology. It is technologically challenging to build such a satellite." RISATs use synthetic aperture radars and the great advantage of RISATs is that they can take pictures of the earth at all times, through rain, sun, clouds, fog and cyclones.
According to ISRO spokesman S. Satish, "This is not only the first radar imaging satellite to be built by India but this is the heaviest remote-sensing satellite built by the ISRO. Besides, it is the heaviest satellite to be put in orbit by the PSLV. RISAT-1 weighs 1858 kg." A powerful PSLV-XL is being used to put RISAT-1 in polar orbit at an altitude of 480 km. The satellite's propulsion system will then be used to take it to the final orbit at an altitude of 536 km, Mr. Satish said.
The rocket is called PSLV-XL (XL stands for extra-large) because it uses six more powerful strap-on motors than those used in the standard PSLV version. If the normal PSLV version's six strap-on motors each use nine tonnes of solid propellants, each of them in the PSLV-XL use 12 tonnes of propellants. This is the third time the ISRO is using a PSLV-XL version. It was first used in October 2008 to put Chandrayaan-1 in orbit and again in July 2011 to during the GSAT-12 launch.
Mr. Satish said pictures from RISAT-1 would be used to estimate the crop yield — especially to monitor paddy crop, assess its acreage and predict its health during the kharif season, when the sky is covered with clouds. The satellite's images can be used for disaster management during cyclones and floods, to assess how much area has been inundated and so on. RISAT-1's life-span is five years.
M. Annadurai is the Programme Director for RISAT-1. N. Valarmathi is its Project Director.
ISRO scientists said that unlike the normal, optical remote-sensing satellites, the RISATs use a synthetic aperture radar (SAR). This radar emits waves in a special way and collects part of the reflected radiation. From this reflected radiation, images of the earth can be built and these images have excellent clarity. Since it is difficult to carry a radar/antenna with a big aperture on a satellite, an SAR is used because it can synthesise (that is, artificially create) a larger aperture electronically. Hence it is called a synthetic aperture radar.
Although this is the first time the ISRO is launching its own RISAT, it has twice launched Israel's RISATs in orbit using the PSLVs from Sriharikota. The ISRO first put Israel's RISAT, Tecsar, in orbit in January, 2008, and the agency deployed Israel's RISAT-2 in orbit in April 2009. Both Tecsar and RISAT-2 are reconnaissance/surveillance satellites. While Israel uses the images from Tecsar, India uses the images from RISAT-2 for surveillance.
http://www.thehindu.com/news/national/article3343033.ece
Countdown Commences for the Launch of PSLV-C19 Carrying India's First Radar Imaging Satellite (RISAT-1)
ЦитироватьThe Launch Authorisation Board (LAB) for Polar Satellite Launch Vehicle (PSLV-C19)/Radar Imaging Satellite (RISAT-1) mission, which met on April 21, 2012 at Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota has cleared the launch of PSLV-C19/RISAT-1 mission at 05:47 hrs (IST) on Thursday, April 26, 2012.
The 71-hour countdown commenced at 06:47 hours today (April 23, 2012). During the Countdown, propellant-filling operations of the liquid propellant second stage (PS2) and fourth stage (PS4) of the launch vehicle will be carried out. Besides, mandatory checks on the launch vehicle and spacecraft will be carried out. Also, charging of batteries and pressurisation of propellant tanks onboard the satellite will be performed. Readiness of various ground systems such as tracking radar systems and communication networks will also be checked.
PSLV-C19 will inject RISAT-1 satellite into an orbit of 480 km altitude at an inclination of 97.552o. The satellite will be put in its final orbital configuration at 536 km altitude using thrusters onboard the satellite.
http://isro.org/pressrelease/scripts/pressreleasein.aspx?Apr23_2012
http://isro.org/pslv-c19/Imagegallery/launchvehicle.aspx
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-1.jpg)
PSLV-C19-PS1-NOZZLE-END SEGMENT ARRIVES AT LAUNCHPAD
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-2.jpg)
PSLV-C19-PS1-MID SEGMENT-1 BEING STACKED
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-3.jpg)
PSLV-C19-PS1-STACK OF ALL 5 SEGMENTS
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-4.jpg)
PSLV-C19-PS0-STRAPON BEING ASSEMBLED TO PS1
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-5.jpg)
PSLV-C19-FULLY ASSEMBLED STAGE 1
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-6.jpg)(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-7.jpg)
PSLV-C19-PS2-SECOND STAGE UNDERGOING CHECKS - PSLV-C19 STACKED UP TO 4TH STAGE
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-8.jpg)(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-9.jpg)
Panoramoric view of Fully Integrated PSLV-C19 - Fully Integrated PSLV-C19
http://isro.org/pslv-c19/Imagegallery/satellite.aspx
(http://isro.org/pslv-c19/Imagegallery/satellite/sat4.jpg)
RISAT-1 with one of its solar panel wings deployed
(http://isro.org/pslv-c19/Imagegallery/satellite/sat5.jpg)
SAT-1 undergoing prelaunch tests at clean room in SDSC, SHAR
(http://isro.org/pslv-c19/Imagegallery/satellite/sat1.jpg)
RISAT-1 Satellite
(http://isro.org/pslv-c19/Imagegallery/satellite/sat3.jpg)
RISAT-1 Satellite
(http://isro.org/pslv-c19/Imagegallery/satellite/sat2.jpg)
http://isro.org/pslv-c19/pdf/pslv-c19-brochure.pdf
Видео:
http://isro.org/video.aspx
ЦитироватьRISAT-1 - Launch Updates
Countdown Operations Underway[/size] (http://www.spaceflight101.com/risat-1-launch-updates.html)
April 25, 2012
India aims to Launch its next Satellite to Orbit on April 26, 2012 at 0:17 GMT aboard a Polar Satellite Launch Vehicle XL Rocket blasting off from the Satish Dhawan Space Center, Sriharikota, India. The Payload for this flight is RISAT-1, a radar satellite.
In Preparation for Liftoff, the 71-hour launch countdown was started on April 23 at 6:47 local time. Nominal Countdown operations include the Propellant Loading of the second and fourth stage of the PSLV Launcher. Stages one and three are both solid-fueled. Also during the countdown, extensive checks of the Rocket and the Spacecraft are conducted as well as battery charging and Satellite Propellant Tank Pressurization. In addition to that, India's Ground Network of Tracking Stations is being configured for the flight.
Launch from the Satish Dhawan Launch Site, the Vehicle will fly a so called 'Dogleg' Trajectory to avoid the Island of Sri Lanka. A Dogleg is a guided, powered turn during the ascent phase of a Rocket Flight. Moving back to its course, the PSLV Rocket will have a nominal burn time of about 15 Minutes delivering its Payload to a Transfer Orbit.
...
Estimated Launch Trajectory
(http://www.spaceflight101.com/uploads/6/4/0/6/6406961/7119800.jpg)
http://webcast.gov.in/live/
5 минут
Улетела!
Есть отделение RISAT-1 !
http://www.nasaspaceflight.com/2012/04/isro-launch-pslv-with-risat-1-satellite/
http://www.youtube.com/watch?v=YlgRfRBAl-g
India's RISAT-1 Satellite - utility & capability
http://www.youtube.com/watch?v=Oe5_3cfnaWw
Succesful PSLV-C19 mission to launch India's RISAT-1 Satellite - Scientists address the public
http://www.youtube.com/watch?v=xHMxcJlVSE8
PSLV C19( RISAT 1) LAUNCH ON 26th APRIL 2012 FROM SRIHARIKOTA
http://www.youtube.com/watch?v=pRLeocHSzVM с другого ракурса
http://www.isro.org/pslv-c19/Imagegallery/launchvehicle.aspx
(https://img.novosti-kosmonavtiki.ru/65928.jpg)
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-11.jpg)
(http://isro.org/pslv-c19/Imagegallery/launchvehicle_images/pslv-c19-12.jpg)
April 28, 2012
Radar Imaging Satellite (RISAT-1) successfully placed in its final orbitЦитироватьThe Radar Imaging Satellite (RISAT-1), launched by PSLV-C19 on April 26, 2012, has now been placed in its final Polar Sun-synchronous Orbit of 536 km height.
It may be recalled that PSLV-C19 had placed RISAT-1 in a polar orbit of 470 km X 480 km. As planned, on April 27-28, 2012, the satellite propulsion system was used in four orbital maneuvers to raise height of the orbit of RISAT-1 to 536 km. The satellite is now in its final orbital configuration and in good health. In the coming days, various elements of the C-band Synthetic Aperture Radar will be tested and calibrated as a prelude to payload operations.
As compared to the optical remote sensing satellites that depend upon sunlight, the Synthetic Aperture Radar of RISAT-1 transmits its own radar pulses (at 5.35 GHz) to study the objects on Earth. This facilitates
1. cloud penetration and
2. imaging even without sunlight.
For RISAT-1, imaging sessions around both 6 AM and 6 PM have been chosen.
http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Apr28_2012
Индийский спутник вышел на заданную орбитуЦитироватьИндийский спутник для дистанционного зондирования поверхности Земли Risat-1, который был в четверг выведен на орбиту высотой 480 километров индийской ракетой-носителем PSLV-C19, сегодня вышел на заданную орбиту высотой 536 километров. Об этом говорится в заявлении для прессы Индийской организации космических исследований (ИСРО).
"Пуск, который состоялся (в четверг) в 05:47 по местному времени (04:17 мск) с космодрома на острове Шрихарикота (вблизи южной части побережья штата Андхра-Прадеш), стал большим успехом для страны, — подчеркнул глава ИСРО К. Радхакришнан. — Это уже 20-й подряд успешный полет индийской ракеты-носителя (PSLV)".
Спутник может использоваться для наблюдения из космоса за развитием циклонов, прогнозирования природных катаклизмов и оценки состояния сельскохозяйственных угодий. В частности, во время наводнения снимки Risat-1 смогут дать четкое представление о масштабах катастрофы и уровне воды.
По словам главы ИСРО, на разработку спутника, способного снимать и обрабатывать изображения круглосуточно при любых погодных условиях, за что его здесь называют просто "спутник-шпион", было потрачено около 10 лет. Данные технические характеристики позволяют использовать космический аппарат также в оборонных целях.
"Масса Risat-1 составляет около 1,8 тонны. Таким образом, он стал самым тяжелым спутником, который индийская ракета-носитель PSLV вывела на орбиту", — рассказал К. Радхакришнан.
Стоимость Risat-1, включая средства, потраченные на его разработку, составила 3,4 миллиарда индийских рупий (почти 70 миллионов долларов). Еще 1,2 миллиарда рупий (24 миллиона долларов) ушло на создание ракеты-носителя PSLV-C19, передает ИТАР-ТАСС.
http://www.vesti.ru/doc.html?id=783318&cid=9
Радиолокационный спутник Индии вышел на орбитуЦитироватьИндийское космического агентство ISRO осуществило вывод на орбиту нового спутника радиолокационной съемки Земли с высоким разрешением RISAT-1 (Radar Imaging SATellite – 1). Запуск состоялся 26 апреля на стартовой площадке №1 космического центра имени Сатиша Дхавана на острове Шрихарикота.
Через 17 минут 44 секунды после старта ракета-носитель PSLV-XL вывела спутник массой 1585 кг на низкую околоземную орбиту высотой около 480 км и наклонением 97,6 град.
В последующие трое суток после запуска планируется перевести спутник на рабочую солнечно-синхронную орбиту высотой 536 км с помощью бортовой двигательной установки. На рабочей орбите он будет совершать 14 витков вокруг Земли ежесуточно. Период повторения подспутниковых трасс составит 25 суток, а местное время пересечения экватора в восходящем узле — 18.00 (с целью ограничения максимальной продолжительности нахождения спутника в тени Земли 20 минутами).
Это уже второй индийский спутник радиолокационной съемки Земли. Впервые спутник такого типа полностью произведен в Индии, включая основное оборудование полезной нагрузки – радиолокатор C-диапазона с синтезированием апертуры. Его стоимость оценивается в 72 млн. долл. США. Предыдущий аппарат — RISAT-2 — был создан при участии израильских специалистов и запущен в 2009 году. Расходы на его разработку и производство составили около 110 млн. долл. США.
Срок активного существования RISAT-1 — 5 лет. Его бортовая система электропитания способна обеспечить функционирование полезной нагрузки мощностью до 4,8 кВт. В ее состав входит две панели солнечных батарей и никель-водородный аккумулятор емкостью 70 А•ч. На орбите спутник ориентируется по трем осям. Для хранения результатов съемки используется твердотельное накопительное устройство емкостью 240 Гбайт. Передача данных на Землю будет осуществляться в Х-диапазоне частот со скоростью 640 Мбит/с (вид модуляции — QPSK).
Установленный на RISAT-1 радиолокатор функционирует на частоте 5,35 ГГц. Он позволит вести круглосуточную и всепогодную съемку земной поверхности в пяти различных режимах с максимальным разрешением менее 2 м (высокоточный режим съемки в полосе 10 км). Угол наклона луча диаграммы направленности радиолокатора может меняться в пределах от 11 до 49 град. Также предусмотрена возможность изменения положений самого спутника по углу крена в пределах 36 град.
Предполагается, что RISAT-1 будет использоваться в интересах гражданских пользователей для контроля состояния сельскохозяйственных угодий, наблюдения районов стихийных бедствий и чрезвычайных ситуаций и решения других народнохозяйственных, научно-прикладных задач и коммерческих задач.
http://www.scanex.ru/ru/news/News_Preview.asp?id=n23723271
Isro's RISAT 1 satellite has Amdavadi heartЦитироватьAHMEDABAD: There is a lot more of Ahmedabad in India's latest satellite orbiting the earth than originally thought. Space Application Centre (SAC) of Indian Space Research Organization (Isro) of course designs payloads for satellites, but this time a Gandhinagar-based company has built the very heart of RISAT-1, launched last month from Sriharikota.
Effectively India's first indigenously built all-weather radar imaging satellite, RISAT-1 uses what is known as the synthetic aperture antenna, which has been designed and built by Sahajanand Laser Technology Limited (SLTL). The antenna captures images of earth using microwave. All previous satellites banked on optical and spectral sensors to capture images, which became ineffective at night and on cloudy days. The latest technology, however, captures images in all weather and light conditions.
"We chose not to make any profit out of this project as it is meant for the country," says Arvind Patel, managing director of SLTL. "The synthetic aperture antenna would have cost the country Rs 10 crore had it been imported from the US or elsewhere. We did it for a tenth of the piece."
Patel had been selected by TOI to give away the Social impact Award to Vikram Sarabhai Community Science Centre (VSCSC) in the education category on October 2 last year. Patel credits VSCSC with turning him into an innovator from a depressed 14-year-old who had failed his class VII exams.
In 2006-07, SLTL, a company with a Rs 100 crore turnover, was first given a contract to build an assembly fixer, which assembled the synthetic aperture antenna. The facility was set up at the company's factory in Gandhinagar. Isro later asked the company to build the antenna itself.
"This is a proud moment for India to indigenously design and develop the best technology at the most affordable price," Patel added. "This successful implementation will boost the morale for future partnerships between Isro and private technology companies."
RISAT-1 will have a number of uses, including crop estimation, climate estimation and advance warning systems for earthquakes and tsunamis.
http://articles.timesofindia.indiatimes.com/2012-05-03/ahmedabad/31555514_1_radar-imaging-satellite-antenna-indian-space-research-organization
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No more delay in crop yield forecast after RISAT-1 launchЦитироватьAHMEDABAD: Delay in forecasting of crop yield and acreage in the country can be avoided after the recent launch of Radar Imaging Satellite 1 (RISAT-1) by Indian Space Research Organisation (ISRO). The satellite for which the main payload was designed by ISRO's Space Applications Centre (SAC) in Ahmedabad was set in its final polar orbit on April 27. The satellite began taking images of the earth's surface from May 1.
An early estimation of the agricultural output for the year, before the arrival of the harvest season, helps the country in better planning and management of its economy. Earlier, these forecasting were done by analyzing data purchased from American satellites. However, due to the long procedure involved in the purchase, procuring such data would get delayed which further led to a delay in forecasting.
"Such data were purchased at various intervals of time.
The cost of purchasing such data amounted to around Rs 2 to 2.5 crore, a year. Other than the high cost, the other issue was also the delay in getting the data. A long process is involved in purchasing the data as it need clearance at various levels. Such a delay can be avoided now and we will be able to forecast well in advance," said SAC director A S Kiran Kumar.
The country's first of its kind satellite which uses microwaves will be able to capture earth images in any type of weather. As these microwaves can penetrate clouds, images of the earth could also be captured during the monsoon seasons as well.
Kumar also said that, because of the high cost, such data could not be very frequency. "With a satellite of our own we will be able to freely get the data as and when required. The satellite can cover the entire country in 25 days."
The satellite will also help scientists to calculate the areas affected during flood, surface change during earthquakes, tracking cyclones, glacier studies, estimating soil moistures of various places and so on.
"The analysis and estimation of these data used to be done by scientists at SAC. We have now trained various departments for the same purpose. For example, forecasting for fishing will be done by Indian National Centre for Ocean Information Services (INCOIS) in Hyderabad. The analysis for acreage and crop yield forecasting will be done by departments related to agriculture," said Kumar.
http://timesofindia.indiatimes.com/city/ahmedabad/No-more-delay-in-crop-yield-forecast-after-RISAT-1-launch/articleshow/13058410.cms
Первые изображения:
http://isro.org/pslv-c19/Imagegallery/satelliteimages.aspx#9
Цитировать (https://img.novosti-kosmonavtiki.ru/185988.jpg) Peter B. de Selding @pbdes (https://twitter.com/pbdes) 2 ч.2 часа назад (https://twitter.com/pbdes/status/826837563008761856)
NASA: India Risat-1 radar sat, April 2012 launch, 540km, 97.6deg, in unexplained 'shedding event' Sept 30. All 12 fragments since deorbited.
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