| Yamal-401 | |
| Names List: | Ямал-401 Yamal-400 KA-1 |
| Mission Type: | Communications |
| Operator: | Gazprom Space Systems |
| Cospar Id: | 2014-082A |
| Satcat: | 40345 |
| Website: | https://www.gazprom-spacesystems.ru |
| Mission Duration: | 15 years (planned) (in progress) |
| Spacecraft: | Yamal-401 |
| Spacecraft Type: | Yamal-400 |
| Spacecraft Bus: | Ekspress-2000 |
| Manufacturer: | ISS Reshetnev (bus) Thales Alenia Space (payload) |
| Power: | 10.6 kW |
| Launch Date: | 15 December 2014, 00:16:00 UTC |
| Launch Rocket: | Proton-M / Briz-M |
| Launch Site: | Baikonur, Site 81/24 |
| Launch Contractor: | Khrunichev State Research and Production Space Center |
| Entered Service: | February 2015 |
| Orbit Reference: | Geocentric orbit[1] |
| Orbit Regime: | Geostationary orbit |
| Orbit Longitude: | 90° East |
| Apsis: | gee |
| Trans Band: | 43 transponders: 17 C-band 36 Ku-band |
| Trans Coverage: | Russia |
| Programme: | Yamal constellation |
| Previous Mission: | Yamal-402 |
| Next Mission: | Yamal-601 |
Yamal-401 (ru|Ямал-401) is a Russian geostationary communications satellite operated by Gazprom Space Systems. It was built by ISS Reshetnev and is based on the Ekspress-2000 satellite bus. It is equipped with 17 C-band and 36 Ku-band transponders.[2] It has a design life of 15 years.
In February 2009, Gazprom ordered two Yamal-400 type satellites from Thales Alenia Space. The satellites were named Yamal-401 and Yamal-402. Thales Alenia Space was to be responsible for all aspects of the development and building of the satellites. Both satellites were to be based on Spacebus4000C3 satellite buses.[3]
However, in 2010, Gazprom changed their satellite order so that the Yamal-401 satellite would be developed by ISS Reshetnev and be based on their Ekspress-2000 satellite bus. Thales Alenia Space would deliver the payload for Yamal-401 as originally agreed (also, no changes on the payload side of things). There were no changes with the Yamal-402 satellite, with Thales Alenia developing and building the whole satellite as originally planned.[4]
Originally, both Yamal-401 and Yamal-402 were to be launched by Ariane 5, but the launches were changed to Proton-M launch vehicles.
International Launch Services (ILS) was contracted to launch Yamal-401, using a Proton-M / Briz-M launch vehicle. The launch took place from Site 81/24 at the Baikonur Cosmodrome, at 00:16:00 UTC on 15 December 2014. The satellite was deployed into the planned geostationary transfer orbit (GTO).