MODAPS PCR VNP 25-013
| PCR Number | VNP 25-013 |
|---|---|
| Date | 2025-12-09 |
| Initiator | Davidson, Carol on behalf of Dan Slayback, Flood Map |
| Abstract | PGE559 2.0.4 In August 2025, the Flood Map team delivered new set of VIIRS Mask files that contained updates to identify recurring floods. The new mask files were setup to use ESDT VIIRSWD_MASKB, to differentiate them from the original set. A new version of PGE559 was prepared to stage the alternate mask files and to update the AlgorithmVersion to 2.1.1. No other changes were made to the PGE itself. |
| Problem Statement | The MASK files used VIIRS NRT Flood Map processing were revised to a suite that flag recurring flood in the output datasets and corresponding GIBS products. The new MASK files use the ESDT of VIIRSWD_MASKB. |
| Description of Change | In August 2025, the Flood Map team delivered new set of VIIRS Mask files that contained updates to identify recurring floods. The new mask files were setup to use ESDT VIIRSWD_MASKB, to differentiate them from the original set. A new version of PGE559 was prepared to stage the alternate mask files and to update the AlgorithmVersion to 2.1.1. No other changes were made to the PGE itself. |
| Products Affected | VCDWDG_L3_NRT and VCDWD_L3_NRT |
| Software Affected | PGE559 2.0.4 |
| Processing String to Receive the Change | NRT |
| Downstream Product Effects | None |
| Data Granules to be Used for Science Testing | Several tests were executed on nrt4, in AS91, to verify the updated mask files enabled recurring flood to appear in the Flood Map data products as well as the corresponding GIBS. Test results were reviewed by LDOPE and the science team and signed off on by both. Updates for the products were also coordinated with the GIBS team prior to putting the PGEs into NRT. |
| Justification | For reflecting recurring floods in outputs, which has been a long-term goal of the flood map products. |
| Effective Date for Implementation of Change | The updated mask files went into use on nrt4 starting with data for 12/9/25, and into nrt3 starting with data for 12/10/25. PGE159 v6.1.10 has all required changes to support using the new mask files and setting the AlgorithmVersion as desired. |
| Status | Sadashiva Devadiga approved 12/10/2025. Carol Davidson implemented 12/09/2025. |
