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