MOSCOW, June 5 The operation of the Express-AM5 telecommunications satellite is limited due to the failure of the liquid cooling circuit of the satellite's thermal control system, the press service of the Federal State Unitary Enterprise «Space Communications» reported. «.
As reported by Kosmicheskaya Svyaz, on June 3 at 04.30 Moscow time, the liquid cooling circuit of the Express-AM5 satellite's thermal control system failed, which led to the excess of the threshold thermal operating modes of the spacecraft.
«To avoid overheating of the satellite and save it operability of the GP KS together with JSC «ISS named after M.F. Reshetnev» developed and implemented a number of measures to maintain the operability of the spacecraft. In accordance with the operational documentation and the recommendations of the chief designer of Reshetnev JSC, some of the transponders were turned off. After that, the satellite continued its work, but the availability of its payload was partially reduced,» the company said .
It is noted that the majority of users retained the opportunity to receive services on Express-AM5. «The rest of the customers were invited to switch to Express AMU7 (145° E) and Express AMU3 (103° E). Some of them have already made the transition. Work with the remaining users continues,» the source added. press service.
The Express-AM5 heavy class spacecraft was launched into orbit on December 26, 2013 and put into operation on April 22, 2014. Made by ISS named after Reshetnev together with FSUE «NIIR» and the Canadian company MDA by order of FSUE «Space Communication».
The satellite was created on the basis of the Express-2000 platform and is equipped with 84 transponders (retransmission antennas) of C-, Ku-, Ka- and L-bands. «Express-AM5» was created taking into account the forecasts for the development of the domestic market for satellite communications and television and radio broadcasting services in accordance with the Federal Target Program «Development of television and radio broadcasting in the Russian Federation for 2009-2015» and is designed for 15 years of operation.
«Express-AM5» is intended also for solving the problems of mobile presidential and government communications, broadband Internet access, providing a package of multiservice services (digital television and radio broadcasting, telephony, video conferencing, data transmission) and for creating communication networks based on VSAT technology in Siberia and the Far East.
Now the orbital constellation of «Space communication» consists of 12 telecommunication satellites «Express». The youngest of them in orbit «Express-AMU3» and «-AMU7», launched in December 2021, began to work for their intended purpose in May this year.