EOS-02 (Microsat-2A), AzaadiSAT – SSLV-D1 – Шрихарикота 1 – 07.08.2022 – 03:48 UTC – авария

Автор zandr, 20.02.2022 21:47:46

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Цитата: undefinedСуллурупета: Индийская организация космических исследований (ISRO) готовится ко второму запуску в этом году. Corona активизирует усилия по увеличению количества экспериментов перед лицом полного спада...
Ракета SSLV также должна быть запущена в период с 25 по 31 марта после того, как 15 марта запланирован запуск долгожданной ракеты-носителя малых спутников (SSLV).


First flight of SSLV.
EOS-02 is an indian Earth observation satellite.


02.08.2022 z wyrzutni FLP w Sriharikota wystrzelony zostanie pierwszy egzemplarz indyjskiej RN SSLV (Small Satellite Launch Vehicle), która wyniesie na orbitę satelitę EOS-02 (Microsat-2A) i AzaadiSAT.


Цитата: undefinedHIGHLIGHTS
  • Isro will launch SSLV on its maiden flight on August 7
  • SSLV will carry Earth Observation Satellite-02 to space
  • SSLV is aimed to cater to on demand satellite launch market
In a bid to compete with the commercial satellite market, the Indian Space Research Organisation (Isro) is set to conduct the maiden launch of its Small Satellite Launch Vehicle (SSLV) on August 7. The rocket will carry Earth Observational Satellite (EOS-02) Mission to space.

The mission will be launched from Satish Dhawan Space Centre in Sriharikota at 9:18 am, and Low Earth Orbit (LEO). The EOS-02 mission is a technology demonstration satellite for various new technologies with applications that include agriculture, forestry, geology, and hydrology.
The Small Satellite Launch Vehicles have been designed by the Indian space agency to attract the emerging small satellite market and provide launch-on-demand services to domestic and foreign customers.
SSLV will free Isro's workhorse Polar Satellite Launch Vehicle for bigger missions. The maiden mission is aimed to demonstrate the technological advancement made by Isro and its capability to deliver smaller payloads into low Earth Orbit.

SSLV is a brainchild of current Isro chief S Somnath, who has been known for his rocket wizardry worldwide. The SSLV has been designed to launch a payload weighing 500 kg to a 500-kilometer planar orbit. By comparison, the PSLV -- the workhorse of Isro -- can take up to a 1,750-kilogram payload into the Sun Synchronous Orbit at 600 km altitude.
Apart from the capability to launch up to 500 kg of satellite mass, the SSLV will have the option of multiple satellite mounting options for nano, micro, and small satellites.
SSLV stages have successfully undergone necessary ground tests. (Photo: Isro)

Weighing 110-tons, the three-stage all-solid stage vehicle is the smallest in the Isro arsenal of launchers and Isro is marketing it as one with the quickest turnaround. The rocket can be assembled and integrated in just 72 hours against other launch vehicles, which takes close to two months to reach the launch pad from the assembly building.
Isro in March conducted the ground testing of the solid booster stage (SS1) that will power the launch vehicle. Isro said that the successful testing has given it sufficient confidence to proceed with the first developmental flight of SSLV (SSLV-D1).

It is worth mentioning that the Centre has allocated Rs 169 crores for the development of the project, which is to cover the development & qualification of the vehicle systems and the flight demonstration through three development flights, SSLV-D1, SSLV-D2, and SSLV-D3.

The Ministry of Science & Technology has in the past said that the SSLV has been primarily envisaged to build a cost-effective launch vehicle with high launch frequency and quick turnaround capability in order to cater to the growing opportunity in the global launch services market for small satellites.
The maiden launch of India's much-awaited SSLV has been delayed in the past owing to the coronavirus pandemic and successive lockdowns that followed. Isro had initially planned to launch the mission in the first quarter of this year. However, the final testing took some time.
"Были когда-то и мы рысаками!!!"


ЦитатаAzaadiSat, built by 750 girl students, to reach orbit next week onboard ISRO's SSLV

 The eight-kg satellite has 75 Femto experiments, selfie cameras to click pictures of its own solar panels and long-range communication transponders.

Built by 750 girl students of 75 schools across India, AzaadiSAT is all set for launch early next month onboard the maiden flight of ISRO's Small Satellite Launch Vehicle (SSLV).
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The eight-kg satellite has 75 Femto experiments, selfie cameras to click pictures of its own solar panels and long-range communication transponders.
The project, with a mission life of six months, is part of the Azadi Ka Amrit Mahotsav celebrations, to mark the 75th anniversary of Independence.
Indian National Space Promotion and Authorisation Centre (INSPACe), in a tweet, said 750 girl students from 75 schools across India will be "cheerfully looking at the maiden launch of India's latest launch vehicle SSLV, as it carries their AzaadiSat onboard as a co-passenger".
"This is the first of its kind space mission with an all-women concept to promote women in STEM (science, technology, engineering and mathematics) as this year's UN theme is 'Women in Space'," Rifath Sharook, Chief Technology Officer, at Space Kidz India, which has developed the satellite, told PTI.
The Indian Space Research Organisation has developed the SSLV to put in low earth orbit satellites weighing less than 500 kg, which are much in demand for applications such as earth observation and providing internet connectivity in remote areas.
The primary payload of the first demonstration flight of SSLV is an earth observation satellite MicroSat 2A.
According to ISRO, an SSLV rocket can be manufactured within a week to meet the demands of the burgeoning space sector.
"Были когда-то и мы рысаками!!!"


"Были когда-то и мы рысаками!!!"


Цитата: undefinedНЬЮ-ДЕЛИ, 7 августа. /ТАСС/. Индия осуществила в воскресенье запуск своей новой легкой ракеты SSLV (Small Satellite Launch Vehicle), произошла потеря данных на заключительной стадии. Об этом Индийская организация космических исследований и разработок (ISRO) сообщила в своем Twitter.
"Первый полет SSLV завершен. Все этапы выполнены, как планировалось. Потеря данных наблюдается на терминальной стадии. Проводится анализ, обновим информацию в ближайшее время", - заявили в ISRO.
Ракета-носитель была запущена с космодрома на острове Шрихарикота с двумя спутниками - студенческим и спутником наблюдения Земли.
"Были когда-то и мы рысаками!!!"



Цитата: undefined
Jonathan McDowell @planet4589 · 40 мин

India's new solid-propellant launch vehicle, SSLV, was launched by
at 0348 UTC Aug 7 from Satish Dhawan Space Centre. Telemetry was lost about 9 minutes into the mission. The rocket got close to orbit but may have fallen a bit short - waiting for confirmation either way

Jonathan McDowell @planet4589 · 39 мин

My estimate of trajectory SE from the launch site:


Jonathan McDowell @planet4589 · 38 мин

If the fourth "VTM" stage did not fire, vehicle would complete about half an orbit and fall in the Pacific near the third stage NOTAM zone around 138W 30S after passing over Australia and New Zealand

Jonathan McDowell @planet4589 · 35 мин

Third stage orbit would be around -58 x 351 km x 41.6 deg

Jonathan McDowell @planet4589 · 32 мин

Third stage (and possibly 4th stage and payloads) would have impacted the Pacific around 0431 UTC.

Jonathan McDowell @planet4589

Oh, here's my plot of the final leg of the SSLV-D1 trajectory - at least, my estimate of it


8:15 AM · 7 авг. 2022 г.·TweetDeck
"Были когда-то и мы рысаками!!!"

Околоземный нищеброд

07.08.2022 11:14:33 #13 Последнее редактирование: 07.08.2022 12:20:38 от Околоземный нищеброд
Когда вчера дочитался в пресс-буклете до digital control system with fully indigenous Electro-mechanical actuators, почему-то подумалось, что так и закончится.
Китайские надо было брать, на Ali...

Такое впечатление, что VTM вообще не включилась?

Твёрдо стою на пути исправления


Успешный дебютный запуск РН. 4-я ступень туда не относится ;D


Цитата: Околоземный нищеброд от 07.08.2022 11:14:33Такое впечатление, что VTM вообще не включилась?
Пропала телеметрия. Видимо взорвалась.
1. Ангара - единственная в истории новая РН которая хуже старой. (с) Старый Ламер
2. Главное назначение Ангары и Восточного - выкачать из бюджета максимум денег.
3. Фалкон-9 длиннее и толще чем  УРМ-1
4. Зато у Рогозина тоннели длиннее и толще чем у Маска
5. Было стыдно и весело (с) Hiroo


07.08.2022 18:57:58 #16 Последнее редактирование: 07.08.2022 20:39:37 от Salo

Цитата: undefinedIndia's new small satellite launcher fails to put satellites into correct orbit

 August 7, 2022 Stephen Clark

India's space agency said Sunday the inaugural demonstration flight of the country's new Small Satellite Launch Vehicle -- the fourth rocket in India's fleet of launchers -- failed to place two satellites into their targeted low Earth orbit.
The 111-foot-tall (34-meter), three-stage launcher took off from the Satish Dhawan Space Center on India's east coast at 11:48 p.m. EDT Saturday (0348 GMT Sunday) on a demonstration flight to validate the performance of the new rocket.
The early phases of the mission went according to plan, according to the Indian Space Research Organization. But the launch team was unable to confirm the final stage of the rocket completed its job of placing two small satellites into orbit.
S. Somanath, chairman of ISRO, said soon after the that engineers were analyzing telemetry from the rocket to determine the outcome of the test flight. Somanath said there were "data losses" in the telemetry stream downlinked in real-time from the rocket.
The rocket appeared to function as designed for the first 10 minutes of the mission. The SSLV's three main solid-fueled stages fired one after the other to propel the launcher over the Bay of Bengal southeast from the Indian spaceport about 50 miles (80 kilometers) north of Chennai.
In a brief statement released several hours after the launch, ISRO confirmed the three main stages performed normally, and the rocket deployed the two satellites in space.
"All the stages performed normal," ISRO said. "Both the satellites were injected. But the orbit achieved was less than expected, which makes it unstable."
ISRO announced later Sunday that EOS-02 satellite and a small CubeSat rideshare payload were injected into an orbit with a perigee, or low point, of 47 miles (76 kilometers). Those orbital parameters would bring the satellites back into the atmosphere, where they would burn up on re-entry.
The Indian space agency said the satellites are "no longer usable," and added the the cause of the failure was "reasonably identified."
"Failure of a logic to identify a sensor failure and go for a salvage action caused the deviation," ISRO said.
Officials said a committee will fully analyze the failure and issue recommendations that will be implemented before the next SSLV demonstration flight.
 Скрытый текст:
The first sign of trouble appeared around the time the rocket's third stage was supposed to give way to the SSLV's final stage, the Velocity Trimming Module, or VTM. The VTM has 16 liquid-fueled hydrazine thrusters, eight designed for attitude control and eight to add velocity to the rocket to inject satellites into their precise orbits.
The impulse from the SSLV's three main solid rocket motors is not enough to reach a stable orbit, and the rocket requires the extra boost from the Velocity Trimming Module. A commentator on ISRO's live webcast of the mission said the VTM was supposed to fire for about 20 seconds on the SSLV test flight, known as the SSLV-D1 mission.
The demonstration mission aimed to release the EOS-02 and AzaadiSAT satellites into a 221-mile-high (356-kilometer) orbit inclined 37.2 degrees fo the equator.
Data displayed on a screen in the Indian launch control center indicated the VTM only fired for one-tenth of a second. But it was not immediately clear if the data display was accurate.
ISRO developed the Small Satellite Launch Vehicle to join the fleet of Indian rockets that include the Geosynchronous Satellite Launch Vehicle Mk.3, GSLV Mk.2, and the Polar Satellite Launch Vehicle.
ISRO first proposed development of the Small Satellite Launch Vehicle in 2016. The development program has cost about $21 million, according to ISRO. The agency aims to manufacture the SSLV for about $4 million per vehicle, good enough to compete with the stable of commercial smallsat launchers from companies like Rocket Lab and Virgin Orbit.
The rocket is capable of hauling a payload of up to 1,100 pounds (500 kilograms) into a 310-mile-high (500-kilometer) orbit, ISRO said.
"SSLV provides low-cost access to space on demand basis," ISRO said. "It offers low turnaround time, flexibility in accommodating multiple satellites, launch-on-demand feasibility, minimal launch infrastructure requirements, etc."
The EOS-02 satellite mounted on the Small Satellite Launch Vehicle's Velocity Trimming Module. Credit: ISRO
The EOS-02 satellite on the maiden flight of the SSLV rocket weighed about 297 pounds (135 kilograms). The infrared imaging spacecraft was designed to demonstrate Earth observation technologies with applications in areas of agriculture, forestry, geology, and hydrology, according to ISRO.
The secondary payload on the SSLV-D1 mission was named AzaadiSAT. The 16.1-pound (7.3-kilogram) nanosatellite was managed by an Indian educational organization named Space Kids India, and carried 75 small payloads from rural Indian students. The CubeSat also hosted an amateur radio transponder, a radiation detector, and a "selfie" camera.
"Были когда-то и мы рысаками!!!"

Околоземный нищеброд

07.08.2022 19:05:25 #17 Последнее редактирование: 07.08.2022 19:11:27 от Околоземный нищеброд
Цитата: Старый от 07.08.2022 18:28:28
Цитата: Околоземный нищеброд от 07.08.2022 11:14:33Такое впечатление, что VTM вообще не включилась?
Пропала телеметрия. Видимо взорвалась.
Не, зигзаг на телеметрии связан с какой-то аномалией в конце работы РДТТ третьей ступени.
Дальше было условное включение VTM на 0.1 сек и штатное отделение полезной нагрузки, зарывшейся в атмосферу (в переводе замечательной фразы ISRO "the orbit achieved was less than expected, which makes it unstable"). Товарищи иностранцы посчитали, что не хватило 94 метров в секунду, на которые VTM должен был выжечь свои 50 кг заправки.
Твёрдо стою на пути исправления



ЦитатаНЬЮ-ДЕЛИ, 7 августа. /ТАСС/. Индийская организация космических исследований (ISRO) в воскресенье заявила, что спутники, выведенные на борту ее новой ракеты-носителя SSLV-D1, "больше не пригодны для использования" после того, как были выведены на эллиптическую орбиту вместо круговой. Индийское космическое ведомство сформирует комитет, который проанализирует причины неудачи.

"[Носитель] SSLV-D1 вывел спутники на эллиптическую орбиту [с апогеем] 356 км и [перигеем] 76 км вместо круговой орбиты 356 км. Спутники больше не могут использоваться. Проблема обоснованно определена", - указано на странице ISRO в Twitter.

"Комитет проведет анализ и вынесет рекомендации", - добавили в ведомстве, указав, что "ISRO скоро вернется с SSLV-D2".

Ракета-носитель была запущена с космодрома на острове Шрихарикота с двумя спутниками - студенческим и спутником наблюдения Земли. Новая малогабаритная ракета-носитель с грузоподъемностью 500 кг предназначена для вывода спутников на низкую околоземную орбиту (500 км). Ее разработка главным космическим агентством Индии призвана упрочить положение южноазиатской страны на мировом рынке космических запусков.
Первый запуск и вывод ПН на заданную опорную орбиту, в большинстве случаев, несовместимы. Индийцы наступили на заржавевшие грабли.
"Мы не осмеливаемся на многие вещи, потому что они тяжелые, но тяжелые, потому что мы не осмеливаемся сделать их." Сенека
«Индия может осуществить подготовку и запуск миссии к Венере в очень короткий срок, поскольку у Индии есть для этого потенциал», -- глава ISRO Шридхара Паникер Сомнатха.


Цитата: Veganin от 07.08.2022 21:16:59https://tass.ru/kosmos/15416461
Цитата: undefinedНЬЮ-ДЕЛИ, 7 августа. /ТАСС/. Индийская организация космических исследований (ISRO) в воскресенье заявила, что спутники, выведенные на борту ее новой ракеты-носителя SSLV-D1, "больше не пригодны для использования"
Умеют же люди формулировать.)