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ENVISAT ASAR

ASAR Alternating Polarisation Medium-resolution Image (ENVISAT.ASA.APM_1P)


This data product is generated from Level 0 data collected when the instrument is in Alternating Polarisation Mode. The product has lower geometric resolution but higher radiometric resolution than ASA_APP and contains one or two co-registered images corresponding to one of the three polarisation combination submodes (HH and VV, HH and HV, VV and VH).

This product is processed using the SPECAN algorithm and contains radiometric resolution good enough for ice applications and covers a continuous area along the imaging swath.

Spatial Resolution: 150 m ground range x 150 m azimuth

Product Availability

On request production via FTP
Available from 14 November 2002 - 8 April 2012.

Access to the EOLI-SA catalogue for on-demand ordering is provided upon submission of a project proposal.

More Info


Data Set Specifications
Temporal Coverage:
2002-11-14 to 2012-04-08
Spatial Coverage:
90 N, 90 S, 180 W, 180 E
Data Type:
Radar Imagery
Processing Level:
Level 1b
Available Resources Type Format Access
Test Data for Users - Level 0 APH - (418Mb) Software Tool HTML Download  
Test Data for Users - Level 0 WS - (613Mb) Software Tool HTML Download  
Test Data for Users - Level 1 - (346Mb) Software Tool HTML Download  
ASAR Products Specification - Revision C Product Specifications PDF Download  
EOLI Catalogue Catalogue HTML   Go to page
SPECAN Algorithm Technical Report HTML   Go to page
ASA_APM_1P File Structure Product Specifications HTML   Go to page
ENVISAT ASAR Science and Applications Technical Note PDF Download  
ASAR Level 1 Algorithms Product Specifications HTML   Go to page
ASAR Product Handbook User Manual HTML   Go to page
More ASAR Documents Product Specifications PDF   Go to page

Minimize ESA Earth Observation Campaigns Data

ESA has been involved in many Earth Observation campaigns over the past 25 years, from ground-based surveys, to ships at sea, aircraft and balloons in the atmosphere and the orbiting satellites in space.

To learn more about these campaigns and available datasets from them, please see the Campaigns page.