Program: Tsikada


Means cicada

Russian navigation program operational since April 1979 (deployment started in late-1976). The satellites composing this system based on the Tsikada bus. This bus carries the Tsikada navigation transponders and optional secondary payloads, e.g. RS, etc. The Cospas ( Nadezhda) package is carried as this secondary payload on some satellites.

Lately the satellites are known as Nadezhda when they carry a Cospas receiver or part of Cosmos. A new generation is known as Kurs or Nadezhda M has just started and the satellites are in the Cosmos program (since it is still experimental). This generation is an new implementation of some equipment which can switch (on ground command) between two modes. The standard mode is Cospas for search and rescue. The other mode is the Kurs geolocation/data store-forward mode. The first use of this hardware was on Cosmos 2315. It was designed by Moscow's space instrumentation institute.

The system is based on 4 planes separated by 45° covering space in order to complete the Parus system.

Occupation of the planes:

Plane 11 Plane 12 Plane 13 Plane 14
Cosmos 0883 Cosmos 0926 Cosmos 1000 Cosmos 1092
Cosmos 1168 Cosmos 1304 Cosmos 1226 Cosmos 1339
Cosmos 1383 Cosmos 1506 Cosmos 1447 Cosmos 1574
Cosmos 1553 Cosmos 1727 Cosmos 1655 Cosmos 1816
Cosmos 1791 Cosmos 1861 Cosmos 2123 Nadezhda 2
Nadezhda 1 Nadezhda 3 Tsikada 1 Nadezhda 4
Cosmos 2181     Nadezhda 5
Cosmos 2230      
Cosmos 2315      
Note: Cosmos 1380 failed to replace Cosmos 1168 in 1982 (placed on a wrong orbit)

The satellites of this program are based on the Musson bus (see Parus for details).

Those satellites downlink at 150.000/400.000 MHz.

Ref: #15 - update: 27.10.04