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ERS-1

 

The ERS satellites's (European Remote Sensing) main mission is to observe Earth, in particular its atmosphere and ocean. Build by Esa, they carry several instruments, including a radar altimeter. ERS-1 was launched in July 1991, switched off in June 1996 and retired in March 2000.

ERS-1 flew on three different orbits:

  • a 3-day period for calibration and sea ice observation (from 12/28/1991 to 03/30/1992 and from 12/24/1993 to 04/10/1994),
  • a 168-day period for geodetic applications (from 04/10/1994 to 09/28/1994 and from 09/28/1994 to 03/21/1995).
  • a 35-day period for multi-disciplinary ocean observations (for the others dates),

ERS-2, the follow-on from ERS-1, was launched in April 1995. It was used in tandem with ERS-1 from August 1995 to June 1996, their identical orbits (35 days) having a one-day shift.
Satellite  ERS-1
Launch on  17/07/1991
End Date  31/03/2000
Altitude  785 km
Inclination  98.52 °
Repetitivity  3, 35, 168 days
Agency  Esa
Goals  Observe Earth and its environment
Link 
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