26372 - GORIZONT 33

Gorizont 33 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, as well as support maritime and international communications.

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 degrees E, Zone 2 from 90 degrees E, Zone 3 from 80 degrees E, Zone 4 from 53 degrees E, and Zone 5 from 14 degrees 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 degrees E and 11 degrees W.

Facts in Brief

Launch Date: 2000-06-06
Launch Vehicle: Proton-K
Launch Site: Tyuratam (Baikonur Cosmodrome), Kazakhstan