MODAPS PCR 18-018
| PCR Number | 18-018 |
|---|---|
| Date | 2018-12-10 |
| Initiator | Charlene Dimiceli |
| Abstract | PGE72 v6.0.5 Fix the water flag problem in the source code library sort_values.c |
| Problem Statement | Water mask dataset in some land tiles from high latitude generated from operational processing at MODAPS had some discrepancy compared to the product generated in-house at SCF |
| Description of Change | Identified the code changes in the SCF version that didn't properly migrated to operation. Updated the PGE to include the following code changes from the SCF version - Fix the water flag problem in the source code library sort_values.c |
| Products Affected | MOD44CH, MOD44CQ, MYD44CH, MYD44CQ |
| Software Affected | PGE72 v6.0.5 |
| Processing String to Receive the Change | Terra and Aqua Forward Processing |
| Downstream Product Effects | None |
| Data Granules to be Used for Science Testing | Generated global data for one 16-day period the current operational version 6.0.4 and the new version 6.0.5. Verified the change in water mask and confirmed no change in any of composite reflectance datasets |
| Justification | Though this change isn't expected to have significant impact on the quality of the downstream VCF product, improved and more accurate water mask in the VCF intermediate is needed for use in generation of Land Water Mask that is used as once of the ancillary input in operational processing of the land products. |
| Effective Date for Implementation of Change | Completed. |
| Status | Major algorithm development completed. Sadashiva Devadiga approved 12/10/2018. Gang Ye approved on 12/10/2018. |
