MODAPS PCR VNP 24-011
| PCR Number | VNP 24-011 |
|---|---|
| Date | 2024-09-19 |
| Initiator | Carol Davidson |
| Abstract | PGE554 1.0.15, PGE554 2.0.13 Revised NPP_PRDNBdaily/DNBdaily_main.c in both the C1 and C2 versions of PGE554 to revise the min value for the valid range for Sensor_Zenith to be 0. |
| Problem Statement | C2 Daily gridded DNB/CM, VNP46A1, VJ146A1, and extended test J2 product, VJ246A1, and C1 VNP46A1, were flagged for having Sensor_Zenith min value for valid range set to -90 and it should be set to 0. |
| Description of Change | Revised NPP_PRDNBdaily/DNBdaily_main.c in both the C1 and C2 versions of PGE554 to revise the min value for the valid range for Sensor_Zenith to be 0. |
| Products Affected | VNP46A1, VJ146A1 and VJ246A1 |
| Software Affected | PGE554 1.0.15, PGE554 2.0.13 |
| Processing String to Receive the Change | S-NPP Forward Processing. J1 Foward Processing. J2 Forward Processing. J2 Reprocessing. |
| Downstream Product Effects | All VIIRS land products. |
| Data Granules to be Used for Science Testing | A science test was conducted of PGE554 2.0.13-0 and PGE554 1.0.15-0 and results reviewed by LDOPE and the LBAN science team. Test of C1 PGE554 1.0.15-0 was done in AS4060, and test of C2 PGE554 2.0.13-0 was done in AS4059. |
| Justification | Correction requested by Bhaskar Ramachandran after review of data found the discrepancy in the min value indicated. Change is strictly going in for the leading edge for SNPP and JPSS1, and for testing archive of JPSS2, but will be used for full JPSS2 reprocessing when that occurs. |
| Effective Date for Implementation of Change | PGE554 2.0.13 and PGE554 1.0.15 were put into use on 9/18/24 for NPP with Data Start of 9/19/24.. PGE554 2.0.13 was put in for J1 and J2 starting with data from 9/19/24. |
| Status | Major algorithm development completed. Sadashiva Devadiga approved 09/20/2024. Sudipta Sakar implemented 09/19/2024. |
