Express-AM11 is a Russian telecommunications satellite created by NPO PM together with the Alcatel Space group, commissioned by the FSUE Space Communication. It was intended to provide a package of multiservice services: digital broadcasting , telephony , video conferencing , data transfer, Internet access. In addition, it allowed the creation of communication networks based on VSAT technology. In the satellite coverage area in a fixed beam were the territory of Russia , the Middle East and Asia (C-band - up to 48 dBW in the center of the zone). Two retargeted satellite beams made it possible to provide modern communication services in Russia , the CIS countries , and on the territory from the east coast of Africa to Southeast Asia and Australia (C-band - up to 47 dB · W in the center of the zone, Ku-band - up to 51 dBW in the center of the zone). Estimated standing point - 96.5 ° in. e. Put into operation on July 1, 2004 . It was deduced from a standing point in a burial orbit in April 2006 [1] .
| Specifications | |
|---|---|
| Launch date | April 27, 2004 |
| Weight | 2600 kg |
| Owner |  FSUE "Space Communication" |
| Manufacturer | NPO PM / Alcatel Space |
| Platform | MSS-767 |
| Launch vehicle | Proton-K - DM-1 |
| NSSDC ID | 2004-015A |
| Energy consumption | 4200 watts |
| Service life (years) | 12 |
| Transponders | |
| C range | 26 (40 MHz ) |
| Ku band | 4 (54 MHz ) |
| Position | |
| Location | Burial orbit |
| Standing point | 96.5 ° in. d. |
Content
Payload
26 C-band transponders with a capacity of 40 (15 units), 70 (10 units), 110 (1 units) W, and a 40 MHz passband. 4 Ku-band transponders with a power of 120 W and a passband of 54 MHz .
The circumstances of the death
March 29, 2006 at 03:41 Moscow time the device stopped transmitting signals. On the same day, working communication with the satellite was restored. According to the analysis of service information and telemetry, the experts determined the following: as a result of external exposure, the liquid circuit of the temperature control system was depressurized; the spacecraft received a sharp dynamic impulse, lost orientation in space and began an uncontrolled rotation [2] . It has been suggested that the cause of the accident was “ space debris ” [3] . Although there were reports in the media that the final conclusions of the commission confirmed the first version of what happened [4] , experts do not consider it possible to fully prove (or disprove) this version without incomparable costs.
The consequences of the accident Express-AM11
As a result of the accident and inconsistent actions of the operators of ground and space systems (FSUE RTRS and FSUE Space Communication) television broadcasting of federal channels was not available for ordinary consumers in Siberia and the Far East. The management of the Federal State Unitary Enterprise “RTRS” blamed the operator of the space group for all problems. [5] [6] FSUE “Space Communications” noted the unwillingness of RTRS technical services to quickly redirect ground-based receiving systems to existing backup satellites. [7]
In 2006, between the parties to the conflict (FSUE Cosmic Communications, FSUE RTRS, OJSC Channel One and FSUE VGTRK), an instruction on cooperation was agreed upon and signed with the joint provision of television and radio broadcasts.
So, in April 2008, the press again appeared claims about the quality of the satellites. [8] [9] As noted by the FSUE “Space Communication”, a number of circumstances in these statements received an inaccurate description and did not correspond to reality. [10] The management of the Federal State Unitary Enterprise “Cosmic Connection” and OJSC “ISS named after Academician M. F. Reshetnev” are considering the prospects of prosecution in connection with the dissemination of knowingly inaccurate information that discredits the business reputation of the satellite manufacturer.
See also
- Tv satellite
- List of geostationary satellites
- Series of satellites "Express"
Links
Notes
- ↑ The operator’s message about the satellite’s withdrawal from the orbital group (inaccessible link) . Date of treatment June 23, 2008. Archived on May 30, 2008.
- ↑ Operator report of the accident Archived on May 30, 2008.
- ↑ Message from the operator about the restoration of satellite orientation (inaccessible link) . Date of treatment June 23, 2008. Archived on May 30, 2008.
- ↑ Media report on the completion of the commission
- ↑ Interview with Director of RTRS Gennady Sklyar
- ↑ Report from the Federal Press and Mass Media Agency
- ↑ The population would not have felt the consequences of a satellite accident (inaccessible link) . Date of treatment June 23, 2008. Archived on May 30, 2008.
- ↑ A message on the RTRS website on April 11, 2008
- ↑ Note to Kommersant on April 12, 2008
- ↑ The reasons for the failure in broadcasting on April 11, 2008 were not problems of the orbiting satellite constellation (inaccessible link) . Date of treatment June 23, 2008. Archived June 20, 2008.