Program: Parus

USSR

Means sail

Russian military navigation program. The constellation is made of 1 satellite per plane on 6 planes spaced by 30°. The first Parus spacecraft was Cosmos 0700, launched in 1974. The system was operational in November 1976. The Tsikada system is a civilian counterpart.

Occupation of the planes


Plane 1 Plane 2 Plane 3 Plane 4 Plane 5 Plane 6
150.03 MHz
400.08 MHz 		149.91 MHz
399.76 MHz 		149.94 MHz
399.84 MHz 		149.97 MHz
399.92 MHz 		150.03 MHz
400.08 MHz 		149.94 MHz
399.84 MHz
           
Cosmos 0778 Cosmos 0789 Cosmos 0726 Cosmos 0864 Cosmos 0700 Cosmos 0755
Cosmos 0971 Cosmos 0951 Cosmos 0887 Cosmos 0996 Cosmos 0894 Cosmos 0928
Cosmos 1141 Cosmos 1089 Cosmos 0991 Cosmos 1091 Cosmos 0985 Cosmos 1011
Cosmos 1275 Cosmos 1225 Cosmos 1072 Cosmos 1153 Cosmos 1104 Cosmos 1150
Cosmos 1308 Cosmos 1386 Cosmos 1181 Cosmos 1349 Cosmos 1244 Cosmos 1333
Cosmos 1417 Cosmos 1531 Cosmos 1295 Cosmos 1459 Cosmos 1344 Cosmos 1428
Cosmos 1513 Cosmos 1610 Cosmos 1464 Cosmos 1605 Cosmos 1577 Cosmos 1535
Cosmos 1634 Cosmos 1709 Cosmos 1448 Cosmos 1802 Cosmos 1725 Cosmos 1550
Cosmos 1759 Cosmos 1904 Cosmos 1627 Cosmos 1934 Cosmos 1821 Cosmos 1598
Cosmos 1891 Cosmos 2074 Cosmos 1745 Cosmos 2016 Cosmos 1864 Cosmos 1704
Cosmos 2004 Cosmos 2184 Cosmos 2026 Cosmos 2100 Cosmos 2034 Cosmos 1808
Cosmos 2135 Cosmos 2310 Cosmos 2154 Cosmos 2173 Cosmos 2142 Cosmos 1959
Cosmos 2266 Cosmos 2341 Cosmos 2218 Cosmos 2239 Cosmos 2233 Cosmos 2061
Cosmos 2327   Cosmos 2366 Cosmos 2336 Cosmos 2361 Cosmos 2180
Cosmos 2334         Cosmos 2279
Cosmos 2346          
At least Cosmos 660, 807, 1064, 2321 were Parus satellites but failed to reach the correct orbit.

Orbit


Perigee/Apogee 1000 km
Inclination 83°
Period 105 min
Orbital cycle 3 days (same ground tracks every 41 revolutions)

Specifications


Prime contractor PO Polyot of Omsk
Platform Musson bus
Mass at launch 1550 kg
Mass in orbit  
Diameter ~ 2 m (cylinder shape with a long mast)
Height 1.4 m for the first birds, then 2 m (without the mast)
Stabilization  
DC power  
Design lifetime  

Broadcast in VHF and UHF at frequencies around 150 and 400 MHz

Parus, Tsikada,Nadezhda, Kurs,Informator and GEO-IK all use the same basic bus, although Parus has older design systems and tends not to last as long.

Ref: #15 - update: 22.07.04