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ASAR Alternating Polarisation Mode Precision Image
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Last update: 30 August 2016
This data product is generated from Level 0 data collected when the instrument is in Alternating Polarisation Mode (7 possible swaths). The product contains two CO-registered images corresponding to one of the three polarisation combination submodes (HH and VV, HH and HV, VV and VH).
This is a stand-alone multi-look, ground range, narrow swath digital image generated using the SPECAN algorithm and the most up to date auxiliary information available at the time of processing. Engineering corrections and relative calibration (antenna elevation gain, range spreading loss) are applied to compensate for well-understood sources of system variability.
Generation of this product uses a technique to allow half the looks of an image to be acquired in horizontal polarisation and the other half in vertical polarisation and processed to 30-m resolution (with the exception of IS1). Absolute calibration parameters are available depending on external calibration activities and are provided in the product annotations.
Spatial Resolution: 30 m ground range x 30 m azimuth
Data Set Specifications
How to access this data
Terms & Conditions applicable
Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions
ASAR Products Specification - Revision C
ASA_APP_1P File Structure
Envisat ASAR Science and Applications
ASAR Level 1 Algorithms
ASAR Product Handbook
More ASAR Documents
How to access EO data
From Delivery to Acquisition
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.