Meridian [NPO PM]
The Meridian series of communications satellites is reported to be the replacement for all the Molniya-1T, the Molniya-3 and Molniya-3K satellite series and possibly also for the communication component of the Parus. They are launched into highly eccentric Molniya-orbits.
Meridian is the highly eccentric orbit (HEO) component of the Integrated Satellite Communications System (ISSS), where they work in conjunction with the geostationary Raduga-1M (Globus-M) satellites.
The bus structure is reportedly pressurized, possibly based on the Uragan-M bus. Meridian satellites carry three transponders operating in different frequency bands.
The first two satellites were launched on Soyuz-2-1a Fregat boosters, afterwards the improved Soyuz-2-1a Fregat-M took over. The fifth satellite was an exception, which used a Soyuz-2-1b Fregat-M booster inherited from another program. Launch site was the Plesetsk cosmodrome.
The second launch reached only a 290 km × 36460 km × 62.8° orbit, indicating a Fregat failure during the end of the second burn, with the third burn not taking place. The fifth launch failed to reach orbit.
The Meridian series ends with the seventh launch. It will be replaced by a new series beginning in 2016, which will feature unpressurized busses.
|Type / Application:||Communication|
|Contractors:||ISS Reshetnev (ex NPO Prikladnoi Mekhaniki, NPO PM)|
|Configuration:||3-Axis stabilized Uragan-M bus ?|
|Power:||2 deployable solar arrays, batteries|
|Mass:||> 2000 kg|
|Orbit:||900 km × 39000 km; 65°|
|Meridian 1 (11L)||2006-061A||24.12.2006||Pl LC-43/4||Soyuz-2-1a Fregat|
|Meridian 2 (12L)||2009-029A||21.05.2009||Pl LC-43/4||P||Soyuz-2-1a Fregat|
|Meridian 3 (13L)||2010-058A||02.11.2010||Pl LC-43/4||Soyuz-2-1a Fregat-M|
|Meridian 4 (14L)||2011-018A||04.05.2011||Pl LC-43/4||Soyuz-2-1a Fregat-M|
|Meridian 5 (15L)||2011-F04||23.12.2011||Pl LC-43/4||F||Soyuz-2-1b Fregat-M|
|Meridian 6 (16L)||2012-063A||14.11.2012||Pl LC-43/4||Soyuz-2-1a Fregat-M|
|Meridian 7 (17L)||2014-069A||30.10.2014||Pl LC-43/4||Soyuz-2-1a Fregat-M|