“ Express AT1 ” is a medium-sized commercial geostationary telecommunications satellite ordered by the Russian satellite operator FSUE “Cosmic Communications” and manufactured by OJSC “Information Satellite Systems” named after academician M.F. Reshetnyova . "
| Express AT1 | |
|---|---|
| Customer |  FSUE "Space Communication" |
| Manufacturer | ISS OJSC Thales Alenia Space ( Payload ) |
| Operator | FSUE "Space Communication" |
| Tasks | communication satellite |
| Launch pad |  Baikonur Sq. 81 |
| Launch vehicle | LV Proton-M - Breeze-M |
| Launch | March 16, 2014 3:08 Moscow time [1] |
| NSSDC ID | 2014-010A |
| SCN | 39612 |
| Specifications | |
| Platform | Express-1000HTB [2] |
| Weight | 1800 kg |
| Power | 5600 W |
| Power supplies | three-stage GaAs |
| Mover | SPD-100 |
| The term of active existence | 15 years |
| Orbit elements | |
| Orbit type | geostationary |
| Standing point | 56 ° c. d. |
| Target equipment | |
| Transponders | 32 Ku |
The spacecraft (SC) should be launched at a standing point of 56 ° C. d. to replace the satellite Bonum-1 . It will provide direct satellite television in the western and eastern parts of Russia in the frequency range Ku- [2] [3] and replenish the group of Express satellites.
Content
- 1 History of creation
- 2 Design
- 2.1 Space platform
- 2.2 Payload
- 3 Satellite Launch
- 4 See also
- 5 notes
- 6 References
Creation History
The contract for the production of the Express AT1 satellite between FSUE Space Communication and Academician M. F. Reshetnyov Information Satellite Systems OJSC was signed on September 22, 2010. In accordance with the terms of the contract, ISS OJSC is responsible for design and development , manufacturing, integration and testing of the spacecraft, as well as for creating a dynamic software simulator. In addition, the company will provide the operator with technical support during the operation of the satellite. Also, on the same day, contracts were signed for the creation of two other of telecommunication spacecraft - Express-AT2 and Express-AM8 [2] .
In April 2012, a critical review of the Express AT1 project took place (along with Express-AM8 and Express-AT2), after which production of equipment for spacecraft began [4] .
On August 19, 2012, the design of the Express AT1 payload module was sent to Thales Alenia Space to install relay equipment on it [5] .
In January 2013, work was completed on the production of a module of service systems [6] .
In July 2013, the process of integrating the Express-1000НTB platform and the payload module began [7] .
Design
Space Platform
| External video files | |
|---|---|
| Work on the design of the Express-AT1 spacecraft (08.21.2012) . | |
| In "ISS" the design of the module of the sl. systems (01/21/2013) . | |
The Express AT1 spacecraft is built on the basis of the Express-1000NTB satellite platform [2] , which in its specific technical and operational characteristics is more than twice as large as the Express AM33 / 44 satellite platform MSS-767 [8] , the previous platform of ISS OJSC . One of the features of the platform is the combined thermal control system, which uses a fully redundant liquid circuit. The platform equipment is placed on honeycomb panels (with the internal structure of a honeycomb ), which in turn are mounted on an isogrid (“waffle”) central pipe. The platform uses solar panels based on three - stage gallium arsenide photoconverters produced by NPP Kvant OJSC (Moscow), Saft VS 180 lithium-ion batteries manufactured by the French company Saft [9] and stationary plasma engines SPD-100 manufactured by OKB Fakel ( Kaliningrad) for the implementation of longitude and latitude corrections [10] .
The satellite in orbit weighs about 1800 kg and has an active life of more than 15 years. The power allocated by the platform for powering the on-board relay complex is 5600 W [2] .
Payload
The design of the payload module of the Express AT1 spacecraft was manufactured by ISS. It consists of cellular panels with a total area of 30 m², containing more than 140 heat pipes to maintain the temperature of on-board devices within acceptable values [11] .
The payload equipment is manufactured by the French company Thales Alenia Space. 36 transponders in the Ku-band will be installed on the spacecraft, 32 of which are active and eight more are in reserve in case of failure of any of the main ones [5] . The total payload mass will be about 360 kg [11] .
The payload of Express AT1 includes two coverage areas in the Ku-band :
- The “Wide Fixed Zone” is designed to operate throughout the western and central territories of Russia . The minimum EIRP of the trunks at the boundaries of the coverage zone is 50 - 51 dBW [3] ;
- The “Eastern Fixed Zone” will cover the territories of western and central Siberia , as well as almost all of Kazakhstan . The minimum EIRP of the trunks at the borders of the coverage zone will be 51 dBW [3] .
Satellite Launch
| External video files | |
|---|---|
| Launch of the Proton-M rocket with the Express-AT1 and Express-AT2 spacecraft (03.16.2014) . | |
The satellite’s initial launch was scheduled for November 2013, which was the deadline for the possible use of the Bonum-1 satellite, which is being replaced by the Express AT1 spacecraft [12] . The launch was made on March 16, 2014 at 3:08 Moscow time. [1] [13] At 12:10 Moscow time, the device successfully separated from the Briz-M overclocking unit, the second device, Express-AT2 , separated 18 minutes after that. [fourteen]
See also
- Satellite connection
- Communication Satellites Express
- FSUE "Space Communication"
Notes
- ↑ 1 2 Press Service of the Russian Space Agency. The Proton-M LV with the Express-AT1 and Express-AT2 spacecraft launched from the Baikonur Cosmodrome . Federal Space Agency (03.16.2014 03:06). Date of treatment March 16, 2014.
- ↑ 1 2 3 4 5 “Express-AT1 / AT2” and “Express-AM8” (inaccessible link) . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova. " Date of treatment May 24, 2013. Archived on November 13, 2013.
- ↑ 1 2 3 Express-AT1 (inaccessible link) . Federal State Unitary Enterprise "Space Communication". Date of treatment May 24, 2013. Archived May 15, 2013.
- ↑ The design of the Express-AT1, Express-AT2, Express-AM8 satellites (link unavailable) was completed . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova. " Date of treatment May 25, 2013. Archived on July 8, 2014.
- ↑ 1 2 Express-AT1 satellite payload module design sent to France (unavailable link) . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova. " Date of treatment May 25, 2013. Archived on April 6, 2014.
- ↑ [ http://www.iss-reshetnev.ru/images/File/newspaper/2013/331.pdf Production of the Express AT-1 satellite] . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova "(January 15, 2013).
- ↑ Integration of the Express-AT1 spacecraft (inaccessible link) . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova "(July 1, 2013). Date of treatment January 4, 2014. Archived on April 7, 2014.
- ↑ AMOS-5 project at the finish line (Newspaper ISS OJSC No. 278) . OJSC "Information Satellite Systems" named after Academician M. F. Reshetnev "(10.21.2010). Date of treatment November 24, 2011. Archived August 31, 2012.
- ↑ Batteries for communication satellites (Newspaper OJSC ISS No. 5 (334)) (Unavailable link) . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova "(March 4, 2013). Date of treatment 2013-25-05. Archived on May 6, 2014.
- ↑ AMOS-5 spacecraft: a new contract in the framework of international cooperation (Journal of ISS OJSC No. 10, p. 11-13) . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova "(August 11, 2010). Date of treatment 2013-25-05. Archived July 1, 2012.
- ↑ 1 2 Readiness of the design of MPN “Express-at1” (Newspaper OJSC ISS No. 27 (315)) (inaccessible link) . JSC "Information Satellite Systems" named after academician M.F. Reshetnyova "(August 24, 2012). Date of treatment 2013-25-05. Archived on September 7, 2012.
- ↑ Express-AT1 will replace Bonum-1 without interruptions in broadcasting (inaccessible link) . Magazine 'Tele-Sputnik'. Date of treatment May 24, 2013. Archived March 3, 2014.
- ↑ Plan of Russian space launches (2012-2013) (inaccessible link) . Forum of the journal "Cosmonautics News". Date of treatment May 24, 2013. Archived on May 29, 2014.
- ↑ Press Service of the Russian Space Agency. The Express-AT1 and Express-AT2 spacecraft were launched into the target orbit . Federal Space Agency (03.16.2014 13:07). Date of treatment March 16, 2014.