NEXT SPACEFLIGHT

Status

Success

Cosmos 1593, 1594 & 1595

Launch Time
Tue Sep 04, 1984 15:49 UTC

Rocket

Proton K/Block-DM-2
RVSN USSR
Status: Retired
Liftoff Thrust: 9,548 kN
Payload to LEO: 19,000 kg
Payload to GTO: 2,400 kg
Stages: 4
Strap-ons: 0
Rocket Height: 57.64 m
Fairing Diameter: 4.35 m
Fairing Height: 10.4 m

Mission Details

Cosmos 1593 & 1594

The USSR took a long time to realize the importance of positioning systems. After launching the Zaliv and Parouss constellations, similar to the American Transit, the Soviets began the development of a new generation, the GLONASS, to be similar to the new American GPS. The first GLONASS satellite was launched in October 1982, and two more were launched into orbit once it was proven to work properly.

Several slightly improved versions were then launched, Block IIA, IIB and IIV. In 1991, the USSR collapses, whereas the constellation finishes its phase I of deployment, composed of 14 satellites. The Soviets are then ahead of the American GPS program. Phase II, with 24 satellites, was reached in 1995. Because of the economic crisis that followed the fall of the USSR, Russia is unable to maintain these 24 satellites in orbit, their replacement is no longer assured.

From 1996, GLONASS is no longer operational. In October 2000, there are only 6 functional satellites, out of the 18 necessary. To solve this problem, it was decided to develop GLONASS-M, with an increased life span. The first one is launched in 2003.

The GLONASS satellites are positioned on elliptical orbits contained in three orbital planes inclined at 64.8°. To transmit their signal, the GLONASS satellites use a multiplexing FDMA (Frequency Division Multiple Access). The GLONASS satellites have a mass of 1413kg, which will allow them to be placed in orbit in clusters of three. The satellites are built around a cylindrical body, which has a length of 8.2m and a diameter of 1m. With the solar panels deployed, the satellites are 7.3m wide.

GLONASS-M are designed around the same systems and subsystems as GLONASS. Their dimensions are the same, but their mass is very slightly increased to 1415kg. But the main advantage of GLONASS-M over their predecessors is their lifetime, seven years. They can be launched into orbit by clusters of three on Proton-M launchers.

Payloads: 2
Total Mass: 2,830.0 kg
Medium Earth Orbit

Cosmos 1595

Uragan-GVM is a mass model of the Uragan (GLONASS) navigation satellite.

These mass models weres subsitituted for real Uragan satellites on the first few test launches to allow the triple launch system to be used and tested, while only one or two real satellite were on board of the Proton-K Blok-DM-2 launch vehicle. The Uragan-GVM mass models were placed into the same orbit as the operational Uragan satellites.

The first two launches carried only one Uragan satellite and two Uragan-GVM mass models. On next six launches were two Uragan satellites and one Uragan-GVM mass model.

Payloads: 1
Total Mass: 1,415.0 kg
Medium Earth Orbit

Location

Site 200/40, Baikonur Cosmodrome, Kazakhstan

Stats

1984

95th orbital launch attempt

Proton-K

119th mission
10th mission of 1984
98th successful mission
22nd consecutive successful mission