http://www.jaxa.jp/press/2010/06/20100623_michibiki_e.html
ЦитироватьJune 23, 2010 (JST)
Mitsubishi Heavy Industries, Ltd.
Japan Aerospace Exploration Agency (JAXA)
Mitsubishi Heavy Industries, Ltd. and the Japan Aerospace Exploration Agency (JAXA) decided to postpone the launch of the first Quasi-Zenith Satellite "MICHIBIKI" by the H-IIA Launch Vehicle No. 18 (H-IIA F18) from the Tanegashima Space Center, which was originally scheduled for August 2, 2010.
The new launch date will be announced as soon as it is determined.
(Reason for launch delay)
JAXA found a potential concern in the onboard reaction wheels of the MICHIBIKI following notification from an overseas manufacturer. It may take some time to clear up the potential concern for the manufacturer by assessing test data. Therefore, we determined that it is better to replace the parts with new ones in order to be able to launch the MICHIBIKI as soon as possible while securing the quality and reliability of the satellite.
Сайты проекта:
http://www.jaxa.jp/countdown/f18/index_e.html
http://www.jaxa.jp/projects/sat/qzss/index_e.html
ЦитироватьContributing to a safe and secure society from directly over Japan anytime
(https://img.novosti-kosmonavtiki.ru/13163.jpg)
Satellite-based positioning systems have been used in a broad array of fields including car navigation and land surveying, and have become indispensable to our lives.
The Quasi-Zenith Satellite System (QZSS) uses multiple satellites that have the same orbital period as geostationary satellites with some orbital inclinations (their orbits are known as "Quasi-Zenith Orbits"). These satellites are placed in multiple orbital planes, so that one satellite always appears near the zenith above the region of Japan. The system makes it possible to provide high accuracy satellite positioning service covering close to 100% of Japan, including urban canyon and mountain terrain. Through the development and deployment of this system, we aim to enhance Japan's satellite positioning technology and contribute to building safe and secure society with enhanced satellite based positioning, navigation and timing technologies.
QZSS Project
Phase one will demonstrate the technological validation for the enhancement of GPS availability and performance and their application, using the first Quasi-Zenith Satellite (QZS-1) "MICHIBIKI". After evaluating these results, the plan moves into phase two which demonstrates the full system capability using three Quasi-Zenith Satellites, including QZS-1.
JAXA is in charge of integrating the system as a whole, as well as cooperating with related research organizations to develop the High Accuracy Positioning Experiment System, the QZS Bus System and the Tracking Control System.
High Accuracy Positioning Experiment System
The proposed High Accuracy Positioning Experiment System consists of onboard instruments capable of generating and transmitting positioning signals and ground tracking stations responsible for estimating the time and orbital position of the satellite.
The system is aimed at improving availability of GPS signals for relevant users through QZSS, which is equipped with instruments capable of generating and transmitting signals compatible with modernized GPS signals. In addition, QZSS is designed to transmit not only these positioning signals but also their correction signals and informations of GPS availability in order to enhance the accuracy and reliability of the positioning signals. A future plan calls for us to acquire technologies necessary for the development of next generation satellite positioning system through orbital demonstration conducted on experimental signal and onboard equipments designed to improve positioning accuracy.
Space-based positioning system has played an important role in wide area and diverse fields from land survey to car navigation, and has become critical to our lives. Research on the Positioning Experiment System is expected to improve benefits of GPS users and expand more sophisticated utilization of an advanced future satellite positioning system.
Major Characteristics
Shape 2 box shape with wing-type solar array paddles
2.9m in depth x 3.1m in width x 6.2m in height
(Length between the tips of the paddles: 25.3m)
Weight Approx. 4000kg
Orbiter Quasi-Zenith Orbit
Altitude Approx. 42,000km
Inclination 45 degrees
Period 23 hours 56 minutes
http://www.jaxa.jp/countdown/f18/index_e.html
ЦитироватьJuly 28, 2010 Updated
H-IIA F18 arrives at the TNSC
The H-IIA Launch Vehicle No. 18 (H-IIA F18,) which will carry the First Quasi-Zenith Satellite "MICHIBIKI" to space, was transported from Shimama Port on Tanegashima Island to the Tanegashima Space Center (TNSC.)
The first and the second stages of the launch vehicle were in separate containers for transportation, thus they will be assembled at the Vehicle Assembly Building (VAB) at the TNSC.
New Launch Day of the First Quasi-Zenith Satellite 'MICHIBIKI' by H-IIA launch Vehicle No. 18 (http://www.jaxa.jp/press/2010/08/20100804_michibiki_e.html)
ЦитироватьScheduled new date of launch : September 11 (Saturday) 2010 (Japan Standard Time)
Launch time : 8:17 p.m. thru 9:16 p.m. (Japan Standard Time)
Launch windows : September 12 (Sunday) through September 30 (Thursday), 2010
*Launch time will be set for each launch day if the launch is delayed.
http://www.jaxa.jp/countdown/f18/index_e.html
ЦитироватьAugust 26, 2010 Updated
MICHIBIKI mated with the PAFThe first quasi-zenith satellite "MICHIBIKI" is now loaded with fuel at the Spacecraft and Fairing Assembly Building (SFA) at the Tanegashima Space Center, and is now in the final preparation phase before launch.
On August 24, a joint operation with the launch vehicle provider started, and the MICHIBIKI was mated with the Payload Attach Fitting (PAF) of the launch vehicle, which is a connection part between the payload and the launch vehicle.
The MICHIBIKI will be encapsulated by the payload fairing, then moved to the Vehicle Assembly Building (VAB) to be loaded onto the H-IIA Launch Vehicle No. 18.
http://mdn.mainichi.jp/mdnnews/news/20100828p2a00m0na011000c.html
ЦитироватьThe space headquarters officially inaugurated the "quasi-zenith satellite system" project -- which will complement the U.S. global positioning satellite system -- in conjunction with parliamentary secretaries from eight ministries and agencies. The new system will require the launch of at least three satellites, the first of which -- dubbed "Michibiki" -- is slated for launch this September. However, due to setbacks in the public-private partnership developing the satellites, the launch of the remaining two is currently up in the air, with the team of parliamentary secretaries stating they will strive to reach a conclusion by next fiscal year.
In order to enhance the space headquarters functionality as the supreme space policy-making body in the government, the Cabinet Secretariat has requested the headquarters' estimated 2011 budget be quadrupled to some 380 million yen.
http://www.jaxa.jp/countdown/f18/index_e.html
ЦитироватьSeptember 2, 2010 Updated
MICHIBIKI live launch report from 7:45 p.m. on Sept. 11th (Sat.)
JAXA is broadcasting a live report of the H-IIA Launch Vehicle No. 18 launch with the first quasi-zenith satellite MICHIBIKI onboard from 7:45 p.m. on September 11 (Saturday,) 2010 (Japan Standard Time.)
You can watch the report through the Internet and some cell phone services as well as at some JAXA offices, including JAXA i, Tsukuba Space Center, at scientific museums, and street vision locations. Please support the MICHIBIKI launch by watching the dynamic live launch images from the Tanegashima Space Center.
We welcome your support messages to the MICHIBIKI, as the project team awaits its launch. Some of the messages may be introduced during the live launch report.
* Please be aware that the launch live report schedule is subject to change due to the preparation status and weather conditions.
http://www.gisa.ru/66759.html
ЦитироватьОткрыт веб-сайт первого QZSS спутника Michibiki
Как сообщает портал www.gps-club.ru, веб-сайт первого квази-зенитного спутника, названного Michibiki, открыт для посетителей, хотя некоторые его страницы все еще находятся в стадии разработки.
Основная цель сайта – публикация данных, полученных с Michibiki. Тем не менее, разработчики постарались сделать его нескучным. Сайт состоит из трех разделов: Play (включает развлекательное интерактивное содержимое), Read (включает информацию о Michibiki) и Use (для использования Michibiki).
Сайт доступен на японском и английском языках и призван быть полезным как специалистам спутникового позиционирования, так и новичкам. Он не только предоставляет оперативную информацию Michibiki, но и содержит детальное объяснение квази-зенитной спутниковой системы (QZSS), и кроме этого, интервью с лидерами в различных областях позицонирования.
Адрес сайта: http://qz-vision.jaxa.jp
http://www.yomiuri.co.jp/dy/features/science/T100908001888.htm
ЦитироватьJapan's 1st navigation satellite good for GPS
Toshiaki Sato / Yomiuri Shimbun Staff Writer
In a nation crowded with mountains and skyscrapers, signals from navigation satellites sent to Global Positioning System devices on the ground, such as those in car navigation systems, are sometimes blocked by obstacles that make it difficult for the devices to accurately determine their locations.
However, Saturday's planned launch of Japan's first navigation satellite is expected to solve the problem, at least partly, as the so-called quasi-zenith satellite would spend significant time above Japan.
The Japan Aerospace Exploration Agency has been preparing to launch Michibiki (a name that means "guidance" in Japanese) to cover the blind spots left by the 30 U.S. navigation satellites that are the foundation of the existing GPS system. This would enable people using GPS locator-equipped cell phones and car navigation systems in this country to receive more accurate information.
It is now common to see people searching for the shortest route to their destination on car navigation systems or cell phones equipped with GPS locators, which calculate their location after receiving signals from multiple navigation satellites.
However, there are places where locators cannot calculate their locations accurately at certain times as signals sent from navigation satellites are sometimes interrupted by mountains and buildings.
From an altitude of about 40,000 kilometers, Michibiki will send signals interchangeable with those of the GPS satellites to locators.
A navigation satellite transmits a stream of data on its location and the time, which is measured by an atomic clock. The receiver notes the difference between the time the data was sent by the satellite and the time it was received. Using this information, it can calculate its own distance from the satellite, and then determine its own location.
Radio waves travel at 300,000 kilometers per second, so an error of 0.000001 second in time results in an error of 300 meters in distance. To accurately determine its location, a locator needs to receive signals from at least four navigation satellites simultaneously.
Currently, 30 U.S. navigation satellites are covering the entire Earth. Sometimes eight to 11 navigation satellites fly near Japan, but in mountainous areas or cities crowded with buildings, there are still times when it is difficult for GPS locators to receive signals from four satellites at the same time.
Michibiki would be helpful in such cases because signals from quasi-zenith satellites are unlikely to be interrupted by obstacles.
Currently, in some urban areas, about 10 percent of the time it is difficult for locators to calculate their locations accurately, but Michibiki would eliminate such gaps and enable locators to work accurately around-the-clock.
Michibiki also would help locators to correct errors in calculating their location.
The speed of radio waves is affected by atmospheric conditions, but the quasi-zenith satellite will send signals that order locators to adjust their calculations according to changes in the atmosphere.
Current cell phones and car navigation systems will not be able to directly receive signals from Michibiki. It will be necessary to develop receivers or software compatible with the signals the new satellite sends out.
In the future, Michibiki is also expected to be used for many other purposes, including controlling airplanes, detecting tsunami in their early stages, helping drivers avoid traffic jams and directing large automated agricultural machines as they move through fields.
The GPS system was developed by the United States and was initially used only for military purposes. China, India, Russia and the European Union are developing and improving their own global navigation satellite systems.
About 10 years from now, space above Asia is expected to be crowded with navigation satellites. There will always be about 20 satellites flying over the continent, JAXA said. Countries have begun discussing how to share their navigation satellites at the United Nations.
Michibiki's orbit takes it above Japan for about eight hours each day, so two more quasi-zenith satellites are needed to cover Japan for 24 hours.
Koji Terada, manager of the Michibiki project at JAXA, said: "Michibiki's activities will determine whether the government decides to launch two more satellites. What we must do now is make sure Michibiki's technology tests will succeed."
(Sep. 9, 2010)
http://h2a.mhi.co.jp/en/mission/countdown/f18.html
ЦитироватьSeptember 11, 2010 07:25 JST
H-IIA F18 arrives at the launch pad. Launch vehicle and pad facility connection operation starts.
September 11, 2010 07:01 JST
H-IIA F18 carrying MICHIBIKI atop the second stage leaves for the launch pad. The launch vehicle, mounted on a mobile launcher, will travel approximately 500 meters from the VAB to the launch pad. This takes approximately 30 minutes.
September 11, 2010 04:07 JST
First Go/NoGo Decision - "Go"
This is an updated Launch Countdown Report on the First Quasi-Zenith Satellite "MICHIBIKI" which will be launched using the H-IIA Launch Vehicle No.18 (H-IIA F18). The weather conditions were checked and the green light given, for transportation of H-IIA F18 from the Vehicle Assembly Building (VAB) to the launch pad. The scheduled launch time of tomorrow September 11 is 20:17:00 JST.
http://space.jaxa.jp/tnsc/webcam/index_j.shtml
(http://s002.radikal.ru/i198/1009/8e/b02dfe85d47b.jpg)
http://h2a.mhi.co.jp/en/mission/countdown/f18.html
(http://h2a.mhi.co.jp/en/mission/countdown/images/f18/f18_cd_05.jpg)
(http://h2a.mhi.co.jp/en/mission/countdown/images/f18/f18_cd_04.jpg)
(http://h2a.mhi.co.jp/en/mission/countdown/images/f18/f18_cd_03.jpg)
(http://h2a.mhi.co.jp/en/mission/countdown/images/f18/f18_cd_02.jpg)
http://h2a.mhi.co.jp/en/mission/countdown/f18.html
ЦитироватьSeptember 11, 2010 13:01 JST
The attitude control system flight slew test has been completed.
September 11, 2010 12:17 JST
Access restriction to be imposed inside a 3000 meters radius from the launch pad
September 11, 2010 11:15 JST
Pre-cooling operations for the liquid hydrogen and oxygen loading systems have commenced.
September 11, 2010 10:30 JST
Terminal countdown operations have started. Access is restricted inside a 400 meters radius from the launch pad.
September 11, 2010 10:01 JST
Second Go/NoGo Decision - "Go"
All aspects of the operation - the readiness of the launch vehicle, the spacecraft, the launch facility, the vehicle tracking and control system, and weather conditions - have been confirmed, and we are go for propellant loading operations. Preparation for the loading will start soon.
http://h2a.mhi.co.jp/en/mission/countdown/f18.html
ЦитироватьSeptember 11, 2010 15:14 JST
Checking of the radio frequency system between the launch vehicle and ground stations has been completed.
September 11, 2010 14:18 JST
It was confirmed that the first and second stage liquid oxygen and liquid hydrogen tanks have been fully loaded.
(http://h2a.mhi.co.jp/en/mission/countdown/images/f18/f18_cd_06.jpg)
Трансляция :
http://www.ustream.tv/channel/jaxa-live
ЦитироватьSeptember 11, 2010 19:47 JST
JAXA's live webcast will start soon. (See JAXA's website.)
We have 30 minutes to launch.
September 11, 2010 19:17 JST
The X-60 minutes terminal countdown operation has started. JAXA live launch webcast will start at 19:45 JST.
September 11, 2010 19:07 JST
Third Go/NoGo decision - "Go"
The green light was given for the X-60 minutes terminal countdown operation.
September 11, 2010 18:31 JST
The second attitude control system flight slew test has been completed.
(http://h2a.mhi.co.jp/en/mission/countdown/images/f18/f18_cd_07.jpg)
Улетела! :wink:
ЦитироватьSeptember 11, 2010 20:18 JST
X+1'00"
H-IIA F18 is flying smoothly.
September 11, 2010 20:17 JST
Liftoff
The H-IIA Launch Vehicle No.18 carrying the First Quasi-Zenith Satellite "MICHIBIKI" lifted off at 20:17:00 JST on September 11, 2010 from the Tanegashima Space Center.
September 11, 2010 20:12 JST
Automatic countdown sequence start
Four and a half minutes to liftoff. The automatic countdown sequence has started.
Первая ступень отработала!
ЦитироватьSeptember 11, 2010 20:45 JST
The separation of MICHIBIKI was confirmed. An updated status of the MICHIBIKI will be given on JAXA's website. This is the end of the Countdown Report. Thank you for visiting our website.
Вроде все успешно...
ЦитироватьLaunch Result of the First Quasi-Zenith Satellite 'MICHIBIKI'
by H-IIA Launch Vehicle No.18
September 11, 2010 (JST)
Mitsubishi Heavy Industries, Ltd.
Japan Aerospace Exploration Agency (JAXA)
Mitsubishi Heavy Industries, Ltd. and the Japan Aerospace Exploration Agency (JAXA) launched the first Quasi-Zenith Satellite "MICHIBIKI" by the H-IIA Launch Vehicle No. 18 (H-IIA F18) at 8:17:00 p.m. on September 11, 2010 (Japan Standard Time, JST) from the Tanegashima Space Center.
The launch vehicle flew smoothly, and, at about 28 minutes and 27 seconds after liftoff, the separation of the MICHIBIKI was confirmed.
We would like to express our profound appreciation for the cooperation and support of all related personnel and organizations that helped contribute to the successful launch of the H-IIA F18.
http://www.izvestia.ru/news/news251142
ЦитироватьЯпония успешно запустила навигационный спутник
Японский навигационный спутник "Мичибики" (Michibiki) успешно запущен в субботу с космодрома Танегасима (Tanegashima) в 20.17 по местному времени (15.17 мск) с помощью японской ракеты носителя H-IIA, сообщает японское космическое агентство JAXA.
"Мичибики" - первый в серии японских космических аппаратов, призванных помочь обеспечить спутниковую навигацию в условиях города и высокогорья.
"Ракета-носитель отработала штатно, и примерно через 28 минут и 27 секунд произошло отделение "Мичибики" от носителя", - говорится в сообщении.
Ранее запуск спутника с помощью японской ракеты H-IIA планировался на 23 июня, однако был отложен из-за потенциальных проблем с гироскопами системы ориентации, о которых сообщила зарубежная компания-производитель этих компонентов. В августе запуск был назначен на 11 сентября.
Спутники серии "Мичибики" предназначены для получения пользователями данных систем спутниковой навигации в условиях города и высокогорья. В городах, где значительная часть небосвода закрыта домами, сигнал спутников часто не достигает навигационных приборов. Чтобы решить эту проблему, было решено запустить несколько спутников, орбита которых проходит точно над Японией.
Предполагается, что один из таких аппаратов будет всегда находиться в зените с точки зрения жителей Японии и сможет успешно ретранслировать навигационный сигнал аппаратов системы GPS.
источник РИА Новости
http://forum.nasaspaceflight.com/index.php?topic=20137.msg636081#msg636081
(http://s59.radikal.ru/i165/1009/b5/72a36c3e37ca.jpg)
Видео:
http://www.youtube.com/watch?v=UK2g3h6HIBw&feature=player_embedded
http://www.youtube.com/watch?v=uczX9Yo8GZY
http://www.youtube.com/watch?v=H8jP4xI9gOk&feature=player_embedded
Циклограмма:
http://www.jaxa.jp/press/2010/09/20100911_h2af18_e.html
Пресс-кит по спутнику:
http://www.jaxa.jp/countdown/f18/pdf/presskit_michibiki_e.pdf
http://www.jaxa.jp/countdown/f18/pdf/0912_1500_e.pdf
ЦитироватьSeptember 12, 2010 (JST)
Japan Aerospace Exploration Agency
First Quasi-Zenith Satellite MICHIBIKI
Result of the First Apogee Engine Firing
The Japan Aerospace Exploration Agency (JAXA) performed the first apogee engine firing (AEF) of the first quasi-zenith satellite "MICHIBIKI" for 67 minutes from 12:02 p.m. on September 12, 2010 (Japan Standard Time, JST) by sending commands from Perth station in Australia.
We have confirmed that the first AEF was successfully carried out through telemetry sent from the satellite.
The satellite is in good health.
(Scheduled next information release)
We plan to announce the calculation result of the AEF this time and the second AEF schedule at around 05:00 a.m. on September 13 (JST).
Не пойму один момент. У японцев нет трассы на 45-градусное наклонение?
ЦитироватьНе пойму один момент. У японцев нет трассы на 45-градусное наклонение?
У них НИП на Огасаваре. М.б. в этом причина?
http://www.jaxa.jp/countdown/f18/pdf/0913_1630_e.pdf
ЦитироватьSeptember 13, 2010 (JST)
Japan Aerospace Exploration Agency
First Quasi-Zenith Satellite MICHIBIKI
Result of the Second Apogee Engine Firing
The Japan Aerospace Exploration Agency (JAXA) performed the second apogee engine firing (AEF) of the first quasi-zenith satellite "MICHIBIKI" for 88 minutes from 1:26 p.m. on September 13, 2010 (Japan Standard Time, JST) by sending commands from the Okinawa station in Japan.
We have confirmed that the second AEF was successfully carried out through telemetry sent from the satellite.
The satellite is in good health.
(Scheduled next information release)
We plan to announce the orbit calculation result of the AEF this time and the third AEF schedule at around 5:00 a.m. on September 14 (JST).
(http://s02.radikal.ru/i175/1009/4f/cc6188e7f48a.jpg)
http://forum.nasaspaceflight.com/index.php?topic=20137.msg637113#msg637113
Цитироватьhttp://www.youtube.com/watch?v=H3joBfk0TZk&feature=player_embedded
Результаты коррекции орбиты:
http://www.jaxa.jp/countdown/f18/pdf/0918_1300_e.pdf
http://www.jaxa.jp/press/2010/09/20100919_michibiki_e.html
ЦитироватьFirst Quasi-Zenith Satellite MICHIBIKI
Completion of the Critical Operation Phase
September 19, 2010 (JST)
Japan Aerospace Exploration Agency (JAXA)
The Japan Aerospace Exploration Agency (JAXA) confirmed that the attitude control mode of the first quasi-zenith satellite "MICHIBIKI" was shifted to the regular control mode at 7:31 p.m. on September 19, 2010 (Japan Standard Time, JST). As the MICHIBIKI has already been injected into the drift orbit, JAXA completed its critical operation phase.
The satellite is in good health.
We will further control the orbit to place the satellite into the quasi-zenith orbit for about one week while carrying out the initial functional verification of the onboard mission devices in cooperation with organizations* that perform technological verifications for about three months.
We would like to express our profound appreciation to all related personnel and organizations who have supported and cooperated with the launch and tracking operation of the MICHIBIKI.
(Note)
- Regular control mode :
Attitude control mode through which the MICHIBIKI flies by directing its positioning antenna toward the Earth.
- Drift orbit:
The last step orbit prior to the quasi-zenith orbit. The orbit altitude and inclination (angle against the equator) are equal to those of the quasi-zenith orbit, but the longitude of the center of the figure-8 orbit is not above Japan. After being injected into the drift orbit, it will take a few days to maneuver the satellite to have its figure-8 center above Japan, thus it will ultimately fly in the quasi-zenith orbit.
- Quasi-zenith orbit :
While the quasi-zenith orbit has the same orbit period of 23 hours and 56 minutes as the geostationary orbit, it can let a satellite stay over Japan longer by taking an elliptical orbit with higher altitude above Japan and flying in a figure-8 orbit.
* National Institute of Advanced Industrial Science and Technology (AIST), Electronic Navigation Research Institute (ENRI), Geospatial Information Authority of Japan (GSI), National Institute of Information and Communications Technology (NICT), Satellite Positioning Research and Application Center (SPAC)
** A movie in the following URL explains more about the quasi-zenith satellite orbit.
http://www.satnavi.jaxa.jp/project/qzss/movie/index.html
www.broadcom.com/press/release.php?id=s509977
ЦитироватьGPS Receiver Successfully Tests Reception of the QZSS Satellite Signals and Codes.
Broadcom Corporation, a global leader in semiconductors for wired and wireless communications, today announced that its single-chip global positioning system (GPS) solution for mobile devices supports the new Quasi-Zenith Satellite System (QZSS) launched by Japan earlier this month. The BCM4751 solution has built-in support for QZSS and also supports additional satellite constellations including the Satellite Based Augmentation System (SBAS), making as many as nine additional satellites available for use in navigation. This built-in support will result in several GPS performance benefits, including improved urban canyon navigation in major cities such as Tokyo and availability of position fixes in more areas than competitive solutions.
Highlights/Key Facts:
• The foundation of the Japanese Quasi-Zenith Satellite System has just
been established with the launch of a new navigation satellite named
Michibiki. This is the first of three satellites in this new constellation.
The QZSS satellites are meant to provide refined navigation
capabilities over existing systems.
• The QZSS satellites require a new set of pseudo random number (PRN)
codes, support for which is already built into the BCM4751.
• Broadcom is working closely with the Japan Aerospace Exploration
Agency (JAXA) to test reception of live QZSS signals and codes as
they become available using the BCM4751.
• The Broadcom BCM4751 is a single-chip GPS receiver used for tracking
and navigation, primarily in mobile devices. Its massively parallel,
hardware correlator architecture provides faster signal searches,
accurate real-time navigation, improved tracking sensitivity and very
low average power consumption. The sensitivity and navigation
performance of the BCM4751 continue to set the standard for the
industry.
• Key features of the Broadcom BCM4751 GPS receiver include:
o 65 nanometer CMOS design featuring a highly integrated radio
frequency (RF) and baseband processor with extremely low power
consumption.
o The smallest complete PCB footprint: 30 mm(2) including band-pass
filter, TCXO and passives.
o High sensitivity operation.
o Increased satellite availability: supports GPS, SBAS and QZSS
satellites at L1 frequency band.
o Integrated power management allowing direct connection to the
battery.
o Available in both wafer level ball grid array (WLBGA) and fine pitch
ball grid array (FPBGA) packages.
Supporting Quotes:
Koji Terata, Project Manager QZSS, JAXA.
"JAXA innovations are driving improved user experience of advanced navigation products. For that reason, JAXA is excited to work with Broadcom to be among the first companies to demonstrate the significant performance benefits of adding the Quasi-Zenith Satellite System (QZSS), including aiding in urban canyon navigation, providing a straighter, more accurate and reliable navigation solution, as well as position fixes in more areas."
Scott Pomerantz, Vice President & General Manager, Broadcom's GPS line of business.
"We are pleased to announce our support of Japan's QZSS satellite system which will improve the accuracy and availability of satellite navigation services. The BCM4751 already sets new standards in performance and low power consumption with state-of-the-art sensitivity and navigation performance and our support for QZSS only accelerates our customers' ability to realize the additional performance benefits provided by this exciting new system."
Снимок Земли камерой Мичибики:
http://www.jaxa.jp/countdown/f18/live/missionphoto_e.html
(https://img.novosti-kosmonavtiki.ru/14271.jpg)[/url]
Такой вопрос к лингвистически подкованным товарищам: как все-таки будет правильно - "Митибики" или "Мичибики"?
С одной стороны, по википедии (которая ссылается на всяких умных сенсеев) "chi" == "ти". С другой - бейте меня ногами, но во время трансляции пуска за кадром постоянно звучало "МиЧИбики". :roll:
http://www.rian.ru/science/20100927/279697569.html
ЦитироватьЯпонский навигационный спутник "Мичибики" выведен на рабочую орбиту
12:54 27/09/2010
МОСКВА, 27 сен - РИА Новости. Японский навигационный спутник "Мичибики" (Michibiki), запущенный в космос 11 сентября, занял свою рабочую орбиту на высоте более 30 тысяч километров над Землей, сообщает в понедельник японское космическое агентство JAXA.
"Мичибики" - первый в серии японских космических аппаратов, призванных помочь обеспечить спутниковую навигацию в условиях города и высокогорья. В городах, где большая часть небосвода закрыта домами, сигнал спутников часто не достигает навигационных приборов. Чтобы решить эту проблему, было решено запустить несколько спутников, орбита которых выбрана таким образом, чтобы аппарат с точки зрения жителя Японии находился почти всегда точно над головой - в зените.
Предполагается, что один из таких аппаратов будет всегда находиться в зените с точки зрения жителей Японии и сможет ретранслировать навигационный сигнал аппаратов системы GPS.
"Последняя операция по изменению орбиты была выполнена в 06.28 по японскому времени 27 сентября. После этого мы получили подтверждение, что спутник успешно вышел на предписанную квазизенитную орбиту", - говорится в сообщении агентства.
Наклонение орбиты составило 41 градус, период обращения - 23 часа 56 минут, апогей - 38,95 тысячи километров, перигей - 32,62 тысячи километров.
Спутник "Мичибики" был запущен 11 сентября с космодрома Танегасима (Tanegashima) с помощью японской ракеты носителя H-IIA.
May 21, 2012 Updated
MICHIBIKI took images of Earth at the time of the annular solar eclipse!ЦитироватьAt around 7:34 a.m. on May 21 (Mon.), an annular solar eclipse was observed from many places in Japan including metropolitan areas. At that time, the Quasi-Zenith Satellite-1 "MICHIBIKI" shot images of the Earth from space. You can see that the area above Japan was blackened because it was shaded by the moon due to the eclipse. In addition to the MICHIBIKI, the Solar Physics Satellite "HINODE" also captured some images of the solar eclipse.
(https://img.novosti-kosmonavtiki.ru/25115.jpg)
http://www.jaxa.jp/projects/sat/qzss/index_e.html