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EKS (Tundra)


 

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Yamal satellites series

At the beginning of the 1990s, Russian firm RKK Energia returned to the development of communications satellites after a nearly three-decade hiatus. Ironically, the company pioneered satellite communications in the USSR in the 1960s before focusing almost entirely on the human space flight.

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A proposed Yamal family (left to right): Yamal-100, Yamal-200, Polyarnaya Zvezda and Yamal-300.

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In the 1990s, many orbital positions assigned to Russia to deploy geostationary satellites had remained unused due to economic crisis of the post-Soviet period. As a result, Moscow risked losing its registered locations along with their potential to deliver communications across the largest country in the world.

Around the same time, the Russian firm RKK Energia was looking to diversify its activities away from prestigious but then severely underfunded field of human space flight. Around 1994, after several years of preliminary studies, the company initiated a privately financed project of a communications satellite, dubbed Yamal. The spacecraft featured the unpressurized modular design, which could be easily modified for a variety of tasks. The satellite's propulsion system included eight SPD-70 electric thrusters using xenon gas.

Thanks to its smaller size, two Yamals could ride a single Proton rocket, potentially increasing Russia's chances to fill its orbital positions. RKK Energia also considered an option of launching a single Yamal on the Molniya rocket, however that plan had never materialized.

The main funding for the Yamal project came from Russia's gas and oil giant Gazprom. The company's numerous oil and gas fields are scattered across huge expanses of Siberia and Northern Russia, (including the Yamal Peninsula which lended its name to the satellite), often hundreds kilometers away from any permanent communications infrastructure. Not surprisingly, Gazprom saw satellite communications as a logical field for investment. In addition to serving its own oil fields, pipeline crews and support infrastructure, Gazprom hoped to sublet unused capacity of its satellites. Gazprom formed Gazkom company, which acted as a customer for the Yamal system. (52)

Gazkom secured two positions in the geostationary orbit at 75 degrees East and 19.5 degrees West longitude. The development of the communications payloads for the Yamal satellites was subcontracted to the US firm Loral. Yamal-100 satellites were expected to carry nine or 10 transponders each.

The launch of the two satellites on a single Proton rocket was initially scheduled for the middle of 1997.

In 1996, RKK Energia also began development of a beefed up version of the satellite designated Yamal-200, which it hoped to sell to the Russian government. A follow-on Yamal-300 configuration was also under consideration.

A Proton rocket successfully delivered a pair of Yamal-100 satellites into orbit on Sept. 6, 1999, however one spacecraft never responded to commands from the ground. (164) The second satellite functioned largely successfully until 2010. On Aug. 9, its owner, Gazprom, retired the satellite, sending it from the crowded geostationary orbit into a higher "burial" orbit. After reaching it, all systems onboard were shut off.

The modular design of the Yamal spacecraft became a basis for the standard satellite platform, dubbed Viktoria. RKK Energia hoped to use it for practically every space application planned by the Russian space agency and by the Russian Ministry of Defense. Indeed, with Viktoria, RKK Energia apparently won a bid to develop the EKS (Tundra) early warning satellites funded by the Russian military.

However, recent sources hint that the EKS network has remained the only satellite system that has adopted the Viktoria satellite bus. Neither the Russian space agency nor the Ministry of Defense has bought into the idea of a single multi-purpose platform. (566) Still, RKK Energia used the experience and technology developed for the original Yamal-100 satellites and for the Viktoria bus to launch a pair of Yamal-200 satellites in 2003 and the BelKA remote-sensing satellite in 2006. However the Yamal-300 project had to be abandoned in April 2009. (566)

The development of the Yamal series for Gazprom was then continued at ISS Reshetnev, Russia's prime developer of communications satellites.

 

Known specifications of the Yamal-100 satellite:

Spacecraft mass
1,360 kilograms
Payload mass
315 kilograms
Power supply system
2.4 kilowatts
Power available for payload
1.3 kilowatts
Orbital position accuracy
0.1 degrees
Projected life span
10 years
Number of transponders
10

(52)

 

The Yamal communications satellite series:

Name
Developer
First launch
No. of transponders
Mass
Yamal-100
RKK Energia
1999 Sept. 6
9
1,360 kg
Yamal-200
RKK Energia
2003 Nov. 22
14-17
1,300 kg
Yamal-300
RKK Energia
Development canceled in 2009
-
2,870 kg
Yamal-300K
ISS Reshetnev
2012 Nov. 3
8 C-band; 18 Ku-band
1,640-1890 kg
Yamal-401
ISS Reshetnev
2014 Dec. 15
-
-
Yamal-402
Thales Alenia Space
2012 Dec. 8
-
-
Yamal-601
Thales Alenia Space
2018, (in development from 2013)
Ka-band
-

 

 

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The article and photography by Anatoly Zak

Last update: August 18, 2016

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Yamal

The Yamal satellite bus. Click to enlarge. Copyright © 2011 Anatoly Zak


Yamal

A scale model of the head section of the Proton rocket with Block D upper stage and a pair of Yamal-100 satellites. Click to enlarge. Copyright © 2009 Anatoly Zak