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Gorizont 25

NSSDCA/COSPAR ID: 1992-017A

Description

Gorizont 25 was a Russian geosynchronous communications satellite. It was launched to provide telephone, telegraph and fax communications services, in addition to relaying TV and radio broadcasts, and supported maritime and international communications. It was stationed at 103 deg E. It transmitted in Siberia and was the solution to the communications problems in Russia's earther region.

The Gorizont spacecraft possessed an initial mass in excess of 2.1 metric tons and have demonstrated a lifetime of nearly 10 years, although a 5-year service life was more common. The 3-axis stabilized satellite was approximately 2 m in diameter and 5 m long with two large solar arrays capable of generating 1.3 kW of electrical power for the first 3 years. Seven separate transmission antennas allowed a variety of reception patterns for both broad and localized terrestrial regions.

A typical Gorizont communications payload included six general purpose (TV, audio, facsimile) 6/4 GHz transponders (five 12.5 W and one 60 W), one Luch 14/11 GHz transponder (15 W), and one Volna 1.6/1.5 GHz transponder (20 W). The Volna transponders were INMARSAT-compatible and were extensively used by the Russian merchant marine fleet via the primary GEO television rebroadcasting system, supporting all five Federation time zones: Zone 1 from 140 deg E, Zone 2 from 90 deg E, Zone 3 from 80 deg E, Zone 4 from 53 deg E, and Zone 5 from 14 deg W. These transmissions were handled by Orbita (12-m receiving antenna) and Moskva (2.5-m receiving antenna) ground stations in the 6/4 GHz band. The Moskva Globalnaya system was inaugurated in 1989 using 4-m receiving antennas and serviced by Gorizonts at 96.5 deg E and 11 deg W.

Alternate Names

  • 21922
  • Gorizont25
  • 1992-017A

Facts in Brief

Launch Date: 1992-04-02
Launch Vehicle: Proton
Launch Site: Tyuratam (Baikonur Cosmodrome), Kazakhstan
Mass: 2125 kg

Funding Agency

  • Russian Space Agency Russia

Discipline

  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

 

Personnel

NameRoleOriginal AffiliationE-mail
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