Minimize SAR

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


Brief description of the instrument, its operations and main mission highlights are available in the sections below:

  Sensor Description   |    Sensor Modes   |   Mission Operations Overview    

Minimize Sensor Description

ERS-1 was launched in July 1991 with its primary instruments being an Active Microwave Instrument (AMI), a Radar Altimeter (RA-1), an Along-Track Scanning Radiometer and microwave sounder (ATSR-1).   The AMI instrument was comprised of two separate radars - a Synthetic Aperture Radar (SAR) and a Wind Scatterometer. These systems enabled three modes of operation - Image Mode, Wave Mode (both performed by the SAR) and Wind Mode (performed by the Wind Scatterometer).

The ERS-1 mission ended in March 2000. Full details of the ERS-1 mission can be found here.



ERS-1 (solar panel to the left of the platform, SAR and Wind Scatterometer to the right of the platform.) Learn more about the ERS-1 spacecraft and sensors here.


The ERS-1 acquisition plan and the various modes of operation are provided here. The standard operational mode provided a 35 day repeat orbit. During the early part of the ERS-1 mission other repeat periods were used: an ice mode (3 day repeat),  geodetic mode (168 day repeat) and tandem mode (joint interferometric mode with ERS-2).

An example plan for February 1996 is shown below:




The ERS-1 SAR Image Mode acquisitions can be downloaded from the ESA Online Dissemination service here.