MODAPS PCR VNP 24-019
| PCR Number | VNP 24-019 |
|---|---|
| Date | 2024-12-09 |
| Initiator | Carol Davidson |
| Abstract | PGE555 2.0.5, PGE535 2.0.4, PGE519 2.0.4, PGE522 2.0.2, PGE512D 2.0.13, PGE518 2.0.4, PGE509 5.0.10 Official C2 versions of PGEs uses in the processing chain for creating LBAN products were updated so that they would work in NRT system, creating outputs with NRT specific ESDTs in cases where the output would be made public. PGEs updated included: PGE519/L2G AOT, PGE522/L2G Light AOT, PGE535/DNB BRDF, and PGE555/Daily LBAN. Note that for PGE535 there were specific code updates provided by Z. Wang to support generating the NRT DNB BRDF products. Also, for PGE535N, NRT DNB BRDF, uses similar production rules as PGE523N/NRT BRDF. Startup DB files for PGE535N/NRT DNB BRDF and PGE555/Daily LBAN, were created from operational file sets in C2 processing. Also requires adding the following C2 versions of PGEs to NRT to support the LBAN processing: PGE509/L2 DNB Refl, PGE512D/DNB L2G (LLL tiles), and PGE518/L2G Light DNB Refl (LLL tiles). No modifications to these PGEs for NRT. |
| Problem Statement | Addition of PGEs to NRT processing stream needed to support generating daily LBAN, VNP46A2_NRT and VJ146A2_NRT, products. Will start with SNPP production and at a future date, add in JPSS1 LBAN in NRT. |
| Description of Change | Official C2 versions of PGEs uses in the processing chain for creating LBAN products were updated so that they would work in NRT system, creating outputs with NRT specific ESDTs in cases where the output would be made public. PGEs updated included: PGE519/L2G AOT, PGE522/L2G Light AOT, PGE535/DNB BRDF, and PGE555/Daily LBAN. Note that for PGE535 there were specific code updates provided by Z. Wang to support generating the NRT DNB BRDF products. Also, for PGE535N, NRT DNB BRDF, uses similar production rules as PGE523N/NRT BRDF. Startup DB files for PGE535N/NRT DNB BRDF and PGE555/Daily LBAN, were created from operational file sets in C2 processing. Also requires adding the following C2 versions of PGEs to NRT to support the LBAN processing: PGE509/L2 DNB Refl, PGE512D/DNB L2G (LLL tiles), and PGE518/L2G Light DNB Refl (LLL tiles). No modifications to these PGEs for NRT. |
| Products Affected | VNP46A2_NRT, VJ146A2_NRT, VNPLG43DNBA[1234]N,VNP04LG_NRT, VJ104LG_NRT, VNP04LGA_NRT, VJ104LGA_NRT |
| Software Affected | PGE555 2.0.5, PGE535 2.0.4, PGE519 2.0.4, PGE522 2.0.2, PGE512D 2.0.13, PGE518 2.0.4, PGE509 5.0.10 |
| Processing String to Receive the Change | NRT |
| Downstream Product Effects | All VIIRS land products. |
| Data Granules to be Used for Science Testing | The PGEs needed for the NRT LBAN processing chain were inserted to nrt4 on 9/19/24 for processing to support evaluation of outputs. After allowing to processes for several days, the data was made available to LDOPE and Z. Wang for review. Initial review revealed the blockiness issue in the water tiles described in PCR 24-18, and is now corrected. Overall review of LBAN NRT outputs was positive. |
| Justification | For continuity of the LBAN product from C1 to C2 for SNPP, and eventually JPSS1 |
| Effective Date for Implementation of Change | PGE555 2.0.5, PGE535N 2.0.4, and other supporting PGEs, were installed on 12/9/24 to nrt3 and nrt4. These will be used from 12/10/24 onward in NRT. |
| Status | Major algorithm development completed. Sadashiva Devadiga approved 12/12/2024. Sudipta Sakar implemented 12/09/2024. |
