MODAPS PCR 25-008
| PCR Number | 25-008 |
|---|---|
| Date | 2025-10-31 |
| Initiator | Carol Davidson |
| Abstract | PGE81 6.1.1 Revised PGE81 for C61 the check_sums.f file the array lat_mis lines 129 and 131 to be as follows:
|
| Problem Statement | In AS61 for MODIS C6.1 leading edge processing, PGE81 stopped generating MxDCSR_B products, both Terra and Aqua versions, as of 10/10/25. This caused downstream PGEs to stall and/or use older than desired MxDCSR_B data as input. The issue was investigated by the Eva Borbas of the ATMOS team and a code correction was implemented to resolve the problem. The MxDCSR_B generated in standard production is synced to NRT machines and used as input there. While the NRT system is configured for PGE06 to proceed with the most current file available, having the newest MxDCSR_B is beneficial to the data. |
| Description of Change | In the PGE81, C61 variation, under MOD_PRCSRB, the check_sums.f file the array lat_mis had mismatched dimensions on lines 129 and 131. Original code had:
Revision to correct is:
The revision to the code allowed the MOD_PRCSRB.exe to process successfully and yield the MxDCSR_B products as desired. |
| Products Affected | All products |
| Software Affected | PGE81 6.1.1 |
| Processing String to Receive the Change | Terra Forward Processing. Aqua Forward Processing. NRT |
| Downstream Product Effects | All products |
| Data Granules to be Used for Science Testing | A test was executed in AS1033 on ops8 for both Terra and Aqua for days 2025-282 through 2025-284 to verify that:
Results from test were reviewed by LDOPE. |
| Justification | The MxDCSR_B is a required input to PGE06/L2 Clouds, and it was not processing for 10/10/25 and beyond due to these products not being produced by PGE81. Therefore, we had to investigate and resolve the issue as to why they were not being generated and prepare a corrected version for use in production in AS61 |
| Effective Date for Implementation of Change | PGE81 6.1.1 will be used starting with day 2025-283, and the new version was installed for use on 10/31/2025. |
| Status | Sadashiva Devadiga approved 12/08/2025. Carol Davidson implemented on 10/31/2025. |
