MODAPS PCR 10-001
| PCR Number | 10-001 |
|---|---|
| Date | 2010-02-04 |
| Initiator | James Kuyper |
| Abstract | Mandriva-2008 certification for Level 1B PGEs. |
| Problem Statement | It was not known whether the Level 1 PGEs would produce output files on Mandriva Linux minions that contained unacceptable differences from those produced on IRIX or Mandrake Linux Machines. |
| Description of Change | Ideally, none should be needed. |
| Products Affected | M[O|Y]D01, M[O|Y]D03, M[O|Y]D021KM, M[O|Y]D021QA, M[O|Y]D02HKM, M[O|Y]D02OBC, M[O|Y]D02QKM |
| Software Affected | PGE01, PGE02 |
| Processing String to Receive the Change | Terra Forward, Terra Reprocessing, Aqua Forward, Aqua Reprocessing |
| Downstream Product Effects | All MODIS PGEs are downstream of the Level 1 PGEs. Small differences in all floating point values in the Level 1 products are to be expected, as they were between IRIX and Mandrake Linux products. These will lead to small numbers of minimum differences in discrete quantities, too. In rare instances, these small differences may lead to much larger ones, such as when a small difference in the radiance value crosses the threshold for marking the pixel as saturated. All of these effects will propagate to downstream products; so exactly equivalent product files should not be expected. |
| Data Granules to be Used for Science Testing | PGE01: 2008-284 - 2008-286 PGE02: 2008-286 12:10 - 13:50 |
| Justification | MODAPS is switching over from Mandrake to Mandriva, and we need to be sure that the differences won't cause unacceptable changes to the product files. |
| Effective Date for Implementation of Change | |
| Status | Science test run at MODAPS, evaluated by James Kuyper and LDOPE. |
