Please make a donation to support Gunter's Space Page.
Thank you very much for visiting Gunter's Space Page. I hope that this site is useful and informative for you.
If you appreciate the information provided on this site, please consider supporting my work by making a simple and secure donation via PayPal. Please help to run the website and keep everything free of charge. Thank you very much.

DSCS-2

DSCS-2 [USAF]

DSCS-2 (Defense Satellite Communications System 2) provides secure voice and data communications for the US military. The contract was managed by the DCA (Defense Communications Agency) for the USAF.

These satellites are the follow-on program to the first generation IDCSP (IDSCS, DSCS-1) satellites, but are operated from a real geostationary orbit.

The DSCS-2 spacecraft are spin stabilized with a despun antenna platform. Body mounted solar cells produced 535 watts. Three NiCd batteries provide 36 AHr total. Hydrazine propulsion system. The payload consisted of two 20 Watt X-Band transponders with 500 MHz bandwidths. Steerable narrow beam antennas and drive mechanism for communications privacy. Capacity is 1300 voice channels or 100 Mbps of data. Compatible with ground-portable units.

DSCS-2 satellites were injected directly into GEO by the Titan-3(23)C launch vehicle without the need to incorporate an apogee kick engine.

DSCS-2 4 remained in use as a test asset for more than 25 years. The last satellite, DSCS-2 15, was deactivated in 2008.

Nation: USA
Type / Application: Communication
Operator: USAF
Contractors: TRW
Equipment: 2 X-Band transponders
Configuration: Spin-stabilization, despun antennas
Propulsion: ?
Power: Solar cells, batteries
Lifetime: 5 years
Mass: 520 kg (#1, 2); 566 kg (#3 -10); 550 kg (#11, 12); 611 kg (#13, 14)
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
DSCS-2 1 (OPS 3431) 1971-095A 03.11.1971 CC LC-40 Titan-3(23)C with DSCS-2 2
DSCS-2 2 (OPS 9432) 1971-095B 03.11.1971 CC LC-40 Titan-3(23)C with DSCS-2 1
DSCS-2 3 (OPS 9433) 1973-100A 13.12.1973 CC LC-40 Titan-3(23)C with DSCS-2 4
DSCS-2 4 (OPS 9434) 1973-100B 13.12.1973 CC LC-40 Titan-3(23)C with DSCS-2 3
DSCS-2 5 (OPS 9435) 1975-040A 20.05.1975 CC LC-40 f Titan-3(23)C with DSCS-2 6
DSCS-2 6 (OPS 9436) 1975-040B 20.05.1975 CC LC-40 f Titan-3(23)C with DSCS-2 5
DSCS-2 7 (OPS 9437) 1977-034A 12.05.1977 CC LC-40 Titan-3(23)C with DSCS-2 8
DSCS-2 8 (OPS 9438) 1977-034B 12.05.1977 CC LC-40 Titan-3(23)C with DSCS-2 7
DSCS-2 9 (OPS 9439) 1978-F01 25.03.1978 CC LC-40 F Titan-3(23)C with DSCS-2 10
DSCS-2 10 (OPS 9440) 1978-F01 25.03.1978 CC LC-40 F Titan-3(23)C with DSCS-2 9
DSCS-2 11 (OPS 9441) 1978-113A 14.12.1978 CC LC-40 Titan-3(23)C with DSCS-2 12
DSCS-2 12 (OPS 9442) 1978-113B 14.12.1978 CC LC-40 Titan-3(23)C with DSCS-2 11
DSCS-2 13 (OPS 9443) 1979-098A 21.11.1979 CC LC-40 Titan-3(23)C with DSCS-2 14
DSCS-2 14 (OPS 9444) 1979-098B 21.11.1979 CC LC-40 Titan-3(23)C with DSCS-2 13
DSCS-2 15 (16) (USA 43, OPS 9446) 1989-069A 04.09.1989 CC LC-40 Titan-34D Transtage with DSCS-3 A2
DSCS-2 16 (15) (OPS 9445) 1982-106A 30.10.1982 CC LC-40 Titan-34D IUS with DSCS-3 A1

References:

  • Donald H. Martin: Communication Satellites, Aerospace Press, 1991, p 100-102