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Yamal 204 (Ямал-204)
Mission type	Communication
Operator	Gazprom Space Systems
Mission duration	Cancelled before launch
Spacecraft properties
Spacecraft	Yamal 204
Spacecraft type	Yamal 200
Bus	USP Bus
Manufacturer	RSC Energia (bus); Alcatel Space (payload)
Launch mass	1,326 kg (2,923 lb)
Power	3400
Orbital parameters
Reference system	GEO
Longitude	49°E
Transponders
Frequency	18 C band
	Yamal Constellation ← Yamal 202 Yamal 300K →

Yamal 204 (Russian: Ямал-204) was a geostationary communications satellite ordered by Gazkom to RSC Energia.^[1] It was to be a twin of Yamal 202 and was supposed to ride along with Yamal 203 on what would have been the third launch of the Yamal program. As a copy of Yamal 202, it would be the second iteration of the USP Bus.^[2]^[3] It would have been a 1,326 kg (2,923 lb) satellite with 4,080W of power (3.4 kW at end of life) on an unpressurized bus.^[4] It would have had eight SPT-70 electric thrusters by OKB Fakel for station keeping.^[5] Its payload was 18 C band transponders to be supplied by Space Systems Loral.^[6]^[7]

History

During 1997, even before the launch of their first satellites (Yamal 101 and Yamal 102), Gazkom was planning the second generation. At that time they planned a 24 satellites of the second generation. This extremely aggressive plan was scaled back by 2001 with a plan to launch four 200 series satellites. The first two, Yamal 201 and Yamal 202 would be launched by 2001 and the second pair, Yamal 203 and Yamal 204 by 2004.

Yamal 201 and Yamal 203 would be identical and be positioned at the 90°E slot and Yamal 202 and Yamal 204 would also be twins and be positioned at the 49°E slot. But the program was delayed and while Yamal 201 and Yamal 202 actually launched on November 24, 2003, Gazkom moved to the Yamal 301 and Yamal 302 project, cancelling both Yamal 203 and Yamal 204.^[8]^[9]^[2]^[3]

References

^ Zak, Anatoly (April 21, 2016). "Yamal communication satellites". RussiaSpaceWeb.com. Retrieved 2016-07-20.
^ ^a ^b Pillet, Nicolas. "Yamal/Historie/Premier tir, premier revers" [Yamal/History/The first setbacks]. Kosmonavtika (in French). Archived from the original on 2016-08-19. Retrieved 2016-07-20.
^ ^a ^b Pillet, Nicolas. "Yamal/Historie/La deuxième génération" [Yamal/History/The second generation]. Kosmonavtika (in French). Archived from the original on 2016-08-19. Retrieved 2016-07-20.
^ "Universal Space Platform". RSC Energia. Archived from the original on 2016-06-17. Retrieved 2016-07-20.
^ Krebs, Gunter Dirk (2015-10-16). "RKK Energiya: USP (Victoria)". Gunter's Space Page. Retrieved 2016-07-20.
^ Pillet, Nicolas. "Descriptif technique Yamal-200" [Yamal-200 technical description]. Kosmonavtika (in French). Retrieved 2016-07-20.
^ "Yamal 202". Satbeams. Retrieved 20 July 2016.
^ Pillet, Nicolas. "Proton-K 24 novembre 2003" [November 24, 2003 Proton-K]. Kosmonavtika (in French). Retrieved 2016-07-20.
^ Krebs, Gunter Dirk (2016-04-17). "Yamal 202, 204". Gunter's Space Page. Retrieved 2016-07-20.