MODAPS PCR VNP 20-006
| PCR Number | VNP 20-006 |
|---|---|
| Date | 2020-10-27 |
| Initiator | Kwofu Vincent Chiang |
| Abstract | PGE502 3.0.28 - Scale factors are applied to convert the previous F-factors to the new F-factors for the M1 and M2 bands, respectively. Changes in PGE502 v3.0.28 found in VNP_1bm7 3.0.35 and VJ1_1bm7 2.1.7. In use in for both at start of mission data reprocessing. |
| Problem Statement | |
| Description of Change | A two-time-segments approach to fit the RSB SD F-factor to the lunar F-factor, using an H-factor model |
| Products Affected | VNP02MOD, VNP02IMG, VNP02DNB, VJ102MOD, VJ102IMG, VJ102DNB |
| Software Affected | PGE502 3.0.28 Process: NPP_PR02 |
| Processing String to Receive the Change | S-NPP Forward Processing. S-NPP Reprocessing. J1 Forward Processing. J1 Reprocessing. |
| Downstream Product Effects | All VIIRS land products |
| Data Granules to be Used for Science Testing | Several science tests of L1 and downstream land product suite generating global products from 16-day period ran at Land SIPS |
| Justification | Reduce S-NPP Earth reflectance for the M1 band by 0.8% and the M2 band by 0.3%. Hence, reduce the reflectance difference between the S-NPP and J1 (NOAA-20) by 0.8% for M1 and 0.3% for M2. No impacts on other reflective solar bands; no impacts on the TEBs and DNB. |
| Effective Date for Implementation of Change | Completed |
| Status | Major algorithm development completed. Kwofu Vincent Chiang approved 10/28/2020. Sadashiva Devadiga approved 11/10/2020 (SNPP), 01/08/2021 (J1). Gang Ye approved on 01/09/2021. |
