Sentinel-1A - Союз-СТ-А/Фрегат-M (VS07) - Куру ELS - 03.04.2014 21:02 UTC

Автор Salo, 14.01.2014 02:28:10

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sbx

еще:

www.airbusdefenceandspace.com
Laser satellite connection system tested

A new Earth observation system integrating satellite and laser technologies, that
could be used in areas like ship detection and emergency response, has successfully
completed its first image download using a gigabit laser transmission system.
The European Data Relay System (EDRS) connects LEO and GEO satellites
together, creating what has been dubbed a SpaceDataHighway.
The transmission via laser of image files took place between the radar sensor on
Sentinel-1A, an Earth observation satellite in LEO orbit, and Alphasat, a communications
satellite in GEO orbit, before being relayed to the ground.
This communication system, based on Laser Communication Terminal (LCT)
technology, is a part of the European Space Agency's (ESA) European Data Relay
System (EDRS), also referred to as the SpaceDataHighway.
It aims to enable secure, high data rate communication between Low Earth Orbit
(LEO) satellites or aerial platforms and Geostationary (GEO) satellites.
The LCT technology has been developed by the Airbus Defence and Space subsidiary
Tesat-Spacecom with the support of the German Aerospace Centre DLR.
During the demonstration, data transfer reached 0.6 Gigabits per second of a possible
1.8 Gigabits per second over a distance of 45,000km between the Laser
Communication Terminals.
LCT operation has already been conducted between LEO satellites, since 2008,
and the it is hoped that the SpaceDataHighway technology will help
to significantly improve data latency and system reactivity.

"This is a major step in the proof of the concept. Once operational, the EDRS –
SpaceDataHighway will move boundaries of space-based data communication significantly,"
said Evert Dudok, head of the communications, intelligence and security (CIS)
business line at Airbus Defence and Space.
"(The) SpaceDataHighway will also serve many commercial and military
applications that require such unparalleled near-real-time, high bandwidth communication
services."

The SpaceDataHighway is a Private Public Partnership including ESA and
Airbus Defence and Space. As the prime contractor, Airbus Defence and Space
builds, owns, operates and co-finances the system infrastructure both on the ground
and in space.
The technology used by the Laser Communication Terminal has been developed
in Germany and supported by the German Aerospace Center DLR, based on
funding by the Ministry of Economics.
The system has already been earmarked for use for Open Ocean Surveillance (OOS),
where the SpaceDataHighway will provide low latency downlink capabilities, supporting
maritime border control and providing support for counter-measures against
threats like piracy and drug smuggling.

ZOOR

ЦитироватьSOE пишет:
допилили лазерный терминал, начали тестирование
Хвастаются успехами
http://advanced-television.com/2015/08/11/laser-signals-beam-dth-programming/

ЦитироватьLaser signals beam DTH programming                  

The European Space Agency (ESA) last week successfully beamed 100 laser-based signals between two orbiting satellites.

The success opens up the possibility of the technology being added to 'conventional' DTH orbiting satellites. The signals were beamed fr om an experimental low-orbiting Sentinel-1A satellite to AlphaSat, operating in geostationary orbit, and with 48,000 kms between the two spacecraft. The data was transmitted at 1.8 gigabits per second.

ESA funded the tests on AlphaSat which is operated by Inmarsat. The laser terminal was funded in part by the German Aerospace Center and constructed by Tesat Spacecom of Germany.

A commercial test-deployment of the technology, from Airbus Defence & Space, is planned for inclusion on the upcoming Eutelsat 9B telecommunications satellite, scheduled for launch later this year.


The appeal for satellite operators is simple: A laser beam can carry about 1000 times more data than a radio frequency-based beam. Laser beams can also be used safely in situations wh ere existing radio-based frequencies are congested, or simply not available.

One company, Laser Light Communications, is working with Australia's Optus on a 'Space Cable' satellite system that they say could handle 7.2 Tb of capacity, whereas a conventional high-throughput satellite could handle – at best – 60-70 Gb of data throughput.
Я зуб даю за то что в первом пуске Ангары с Восточного полетит ГВМ Пингвина. © Старый
Если болит сердце за народные деньги - можно пойти в депутаты. © Neru - Старому


che wi

Copernicus Sentinel-1A satellite hit by space particle

Цитировать31 August 2016.  ESA engineers have discovered that a solar panel on the Copernicus Sentinel-1A satellite was hit by a millimetre-size particle in orbit on 23 August. Thanks to onboard cameras, ground controllers were able to identify the affected area. So far, there has been no effect on the satellite's routine operations.

Спойлер
A sudden small power reduction was observed in a solar array of Sentinel-1A, orbiting at 700 km altitude, at 17:07 GMT on 23 August. Slight changes in the orientation and the orbit of the satellite were also measured at the same time.

Following a preliminary investigation, the operations team at ESA's control centre in Darmstadt, Germany suspected a possible impact by space debris or micrometeoroid on the solar wing.  

Detailed analyses of the satellite's status were performed to understand the cause of this power loss. In addition, the engineers decided to activate the board cameras to acquire pictures of the array. These cameras were originally carried to monitor the deployment of the solar wings, which occurred just a few hours after launch in April 2014, and were not intended to be used afterwards.

Following their switch-on, one camera provided a picture that clearly shows the strike on the solar panel.

The power reduction is relatively small compared to the overall power generated by the solar wing, which remains much higher than what the satellite requires for routine operations.

"Such hits, caused by particles of millimetre size, are not unexpected," notes Holger Krag, Head of the Space Debris Office at ESA's establishment in Darmstadt, Germany.

"These very small objects are not trackable from the ground, because only objects greater than about 5 cm can usually be tracked and, thus, avoided by manoeuvring the satellites.

"In this case, assuming the change in attitude and the orbit of the satellite at impact, the typical speed of such a fragment, plus additional parameters, our first estimates indicate that the size of the particle was of a few millimetres.

"Analysis continues to obtain indications on whether the origin of the object was natural or man-made. The pictures of the affected area show a diameter of roughly 40 cm created on the solar array structure, confirming an impact from the back side, as suggested by the satellite's attitude rate readings."
[свернуть]

This event has no effect on the satellite's routine operations, which continue normally.

napalm

А вот будь на AMOS 5 камера, может и не было бы так смешно читать версии  ;)

thunder26

Цитироватьnapalm пишет:
А вот будь на AMOS 5 камера, может и не было бы так смешно читать версии  ;)
И как бы она помогла?
Очень трудно сделать точный прогноз, особенно о будущем (с) Нильс Бор

PIN

Она и здесь была включена из любопытства и PR - по симптомам и так было понятно, что произошло. На Sentinel-1B, улетевшем в этом году, камер нет, что управленцев только радует.

napalm

Цитироватьthunder26 пишет:
Цитироватьnapalm пишет:
А вот будь на AMOS 5 камера, может и не было бы так смешно читать версии  ;)  
И как бы она помогла?
Я думаю никак, это была шутка..  может смайлики не отображается?

ZOOR

Крутая работа

ЦитироватьА.Г. Костяной, Е.В. Булычева, О.Ю. Лаврова, М.И. Митягина, Т.Ю. Бочарова, Д.М. Соловьев, А.М. Сирота
Беспрецедентный случай нефтяного загрязнения морской поверхности с судна в Юго-Восточной Балтике 23 июля 2016 г.
Я зуб даю за то что в первом пуске Ангары с Восточного полетит ГВМ Пингвина. © Старый
Если болит сердце за народные деньги - можно пойти в депутаты. © Neru - Старому

PIN

ЦитироватьZOOR пишет:
А.Г. Костяной, Е.В. Булычева, О.Ю. Лаврова, М.И. Митягина, Т.Ю. Бочарова, Д.М. Соловьев, А.М. Сирота
 Беспрецедентный случай нефтяного загрязнения морской поверхности с судна в Юго-Восточной Балтике 23 июля 2016 г.
А это теперь рутина для соответствующих органов в ЕС - фиксировать документально такие случаи и штрафовать потом. С постепенным переходом на лазерный канал через EDRS, насколько знаю, появилась и возможность высылать карателей до того, как судно уйдет.


tnt22

ЦитироватьEarth from Space: special edition

European Space Agency, ESA

Опубликовано: 9 нояб. 2017 г.

Discover more about our planet with the Earth from Space video programme. This special edition celebrates three years of successful operations of the Copernicus Sentinel-1 constellation.
https://www.youtube.com/watch?v=BBayB_B_VEMhttps://www.youtube.com/watch?v=BBayB_B_VEM (8:17)

R136A1

Аномалия Copernicus Sentinel-1B (обновление)
25 декабря 2021 г.


Copernicus Sentinel-1B недоступен с 23 декабря 2021 года в 06:53 UTC, данные не генерируются.
После соответствующих новостей от 23 декабря 2021 года было проведено детальное расследование. В течение следующих дней будут предприняты определенные действия для внесения изменений в бортовую конфигурацию, которые предотвратят повторное возникновение аномалии (которая может привести к рискам безопасности спутника).
Это требует моделирования и проверки системы на земле перед загрузкой на спутник.
Этот период недоступности спутника потенциально может длиться до 2 недель, однако прилагаются все усилия, чтобы сократить эту недоступность.
Дальнейшие новости о восстановительных операциях будут опубликованы. Приносим извинения за причиненные неудобства.


https://sentinels.copernicus.eu/web/sentinel/-/copernicus-sentinel-1b-anomaly-update-1/1.1