Minimize SAR

The SAR menu to your right provide information concerning the SPPA activities for this instrument. 


A brief description of the instrument, its operations and main mission highlights is available in the sections below:

  Sensor Description   |    Sensor Modes   |   Mission Operations Overview    

Minimize Sensor Description

ERS-2 was launched in April 1995 with  its primary instruments being an active microwave instrument (AMI), a radar altimeter, an along-track scanning radiometer, an ozone monitoring sensor and microwave sounder. The AMI comprised two seperate radars - a Synthetic Aperture Radar (SAR) and Wind Scatterometer. These enable three modes of operation - Image Mode, Wave Mode (both performed by the SAR) and Wind Mode (performed by the Wind Scatterometer).

The last SAR data was acquired on 04 July 2011 and the ERS-2 mission was retired on 05 September 2011. Full details of the ERS-2 mission can be found here.


ERS-2 (solar panel to the left of the platform, SAR and wind scatterometer to the right of the platform). Learn more about the ERS-2 spacecraft and sensors here.


Full details of the ERS-2 acquisition plan and the various modes of operation are provided here. The standard operational mode provided a 35 day repeat orbit. Special modes include the tandem mode (joint interferometric modes with ERS-2 and ENVISAT and a 3 day repeat cycle at the end of the Mission). Tandem operation with ENVISAT occurred for:

  • 1st tandem mission – 09/2007 to 02/2008
  • 2nd tandem mission – 11/2008 to 04/2009
  • 3rd tandem mission – 02/2010 to 04/2010
  • 4th tandem mission – July to October 2010.

The high level operational plan describes in more detail the various operational phases of ERS-2. The ERS-2 SAR acquisitions information is stored in the EOLI catalogue (the Client for browsing the catalogue can be downloaded here).