Helios 1A-1B

Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9
A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z

Helios 1A-1B

Part of SPOT-4

Helios 1A
Credit: Manufacturer Image

French military surveillance satellite. Helios 1A an 1B were advanced French military surveillance satellites which were widely believed to have 1 meter resolution capability. Reconnaissance, electro-optical satellite built by ATrospatiale, Matra Marconi for DGA, France. Launched 1995 - 1999. Used the SPOT Mk.2 bus.

Status: Operational 1995. First Launch: 1995-07-07. Last Launch: 1999-12-03. Number: 2 . Gross mass: 2,537 kg (5,593 lb).

The Missile and Space Directorate (DME) of the French armament agency (DGA) headed the overall $2 billion Helios program. Spacecraft and payload information was not readily available due to the secret nature of the program.

The Helios program was Europe's military optical reconnaissance system consisting of both a space and a ground segment, which commenced service in 1995, jointly funded by the French, Italian and Spanish governments. The Helios I optical observation satellites, launched in July 1995 and December 1999 respectively, could acquire high resolution images of any point on the globe, with daily revisit capability.

The spacecraft was 3-axis stabilized, nadir pointing. CNES operated a Helios ground station in Toulouse, France. The imaging system used 4096 pixel and 2048 pixel linear CCDs to provide 1 - 5 meter resolution images. The CCDs were produced by Thompson CSF. Tape recorders were manufactured by Schlumberger Industries.

More at: Helios 1A-1B.

Family: Military surveillance sat, Sun synchronous orbit, Surveillance. Country: France. Launch Vehicles: Ariane, Ariane 4, Ariane 40. Launch Sites: Kourou, Kourou ELA2. Agency: CNES, DGA, Matra Marconi. Bibliography: 2, 552, 554, 6, 12532.

1995 July 7 - . 16:23 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 40.

Helios 1A - . Mass: 2,537 kg (5,593 lb). Nation: France. Agency: CNES, DGA. Program: Helios. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: SPOT-4. Spacecraft: Helios 1A-1B. USAF Sat Cat: 23605 . COSPAR: 1995-033A. Apogee: 682 km (423 mi). Perigee: 680 km (420 mi). Inclination: 98.10 deg. Period: 98.40 min.

1999 December 3 - . 16:22 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 40.

Helios 1B - . Mass: 2,750 kg (6,060 lb). Nation: France. Agency: DGA. Manufacturer: Toulouse. Program: Helios. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: SPOT-4. Spacecraft: Helios 1A-1B. USAF Sat Cat: 25977 . COSPAR: 1999-064A. Apogee: 682 km (423 mi). Perigee: 680 km (420 mi). Inclination: 98.20 deg. Period: 98.40 min.
French optical military reconnaisance satellite based on Spot 4. Taken out of service in mid-October 2004, when the orbit of the satellite was lowered to 637 x 640 km, taking it out of the path of Helios 1A and the Helios 2A that would be launched in December 2004.

Home - Search - Browse - Alphabetic Index: 0- 1- 2- 3- 4- 5- 6- 7- 8- 9
A- B- C- D- E- F- G- H- I- J- K- L- M- N- O- P- Q- R- S- T- U- V- W- X- Y- Z