Minimize ASAR

The ASAR 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

The Advanced Synthetic Aperture Radar (ASAR) was an active radar sensor on-board the European Space Agency (ESA) satellite ENVISAT, which was operational from March 2002 until the unexpected loss of contact in April 2012. ASAR extended the mission of the Active Microwave Instrument (AMI) Synthetic Aperture Radar (SAR) instruments flown on the European Remote Sensing (ERS) Satellites: ERS-1 and ERS-2. ASAR used an active planar phased-array antenna, operating at 5.331 GHz, with incidence angles of between 15° and 45°. Applications for this sensor are many and include the study of ocean waves, sea ice extent and motion, and land surface studies, such as deforestation and ground movement.
For further information on ASAR please refer to the ASAR Product Handbook. It is also available to download as a PDF.


ASAR wides swath mode multi-temporal image of Indonesia with 75 meter pixel sampling.


The above false colour image of Indonesia has been generated using three ASAR images by assigning red to an acquisition on 8 January 2004, green to 12 June 2003 and blue to 22 April 2004. Note the seasonal changes in cultivated areas along Java's north coast. Indonesia is located within the Pacific 'Ring of Fire' volcano belt and has more than a hundred active volcanoes within its territory. With around 200 million inhabitants, Java is the most populated island in the world. The island was formed by ancient volcanic activity and its 132000 km2 of territory contains no fewer than 38 extinct or active volcanoes. A volcanic mountain chain can be seen running across the island from east to west.