# Active Microwave Instrument

The Active Microwave Instrument (AMI) operating at a frequency of 5.3 GHz (C-band) combines the functions of a Synthetic Aperture Radar (SAR) and a Wind Scatterometer (WNS). Through its set of four antennae (three for the Scatterometer and one for the SAR - see the figure), the Earth's surface is illuminated and the backscattered energy is received to produce data on wind fields and wave spectra, and to prepare high resolution images.

## Active Microwave Instrument

  AMI Technical Details
  SAR Image Mode
  SAR Data Products

ESA Earth Observation