ASAR PROCESSOR RELEASES

Processor Releases

The ASAR generic processor was developed for near real time (NRT) and off-line processing by MDA.

 

Envisat processing requirements

(as per Envisat Ground Segment – ASAR Processing and Product Quality Requirements, PO-RS-ESA-GS-00245, Issue 3.3, 01 July 1997 - Image Quality Parameter)

 

Image Quality Parameter ENVISAT ASAR
Single Beam
ENVISAT ASAR
ScanSar
RANGE IRF < 10% < 10%
AZIMUTH IRF < 10% < 10%
PSLR degradation < 2 dB < 2 dB
ISLR degradation < 2 dB < 2 dB
Doppler Centroid Accuracy 50 Hz 25 Hz
Radiometric Error < 0.1 dB < 0.2 dB
Point Target Linearity > 0.97 > 0.97
Absolute Location accuracy < 2 pixel lengths < 2 pixel lengths
Geometric misregistration < 0.5 pixel lengths < 0.5 pixel lengths

 

The following table lists all IPF-ASAR processor updates since 2008, when it was updated to run on a Linux system.
Prior to this, PF-ASAR was designed to run on an AIX system.

IPF Version Release Date 
5.00 26th June 2007 
5.01 3rd April 2008 
5.02 1st December 2008 
5.03  26th May 2009 
5.03L02 25th August 2009 
5.03L03 9th October 2009 
5.04 17th September 2010 
6.00 16th December 2011 
6.02 30th April 2012 
6.03 3rd July 2015 (current version used in processing) 
6.04 25th January 2016 (internal release, not currently used for processing)