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MODAPS PCR VNP 24-004

PCR Number	VNP 24-004
Date	2024-02-27
Initiator	Carol Davidson
Abstract	PGE554[GN] 2.0.11 Revision to the PGE554N_LoaderModule.pl include: PGE554N runs hourly. If not processing the 2300 hour of the day, check if PGE554G has already finished processing the next hour, and if so, did it generate data for the tile to be processed. If it did, put current RI for that tile/hour to NoRun and go to the next hour for processing. If RI start time is not 0000, then check if for the previous hour, of PGE554N is not completed yet (Status is not "RunOk", or "NoRun"). If still waiting to run, then immediately go to TryAgainLater.
Problem Statement	Revision for PGE554N_LoaderModule.pl to help improve performance and eliminate excess recipe instances.
Description of Change	Revision to the PGE554N_LoaderModule.pl include: PGE554N runs hourly. If not processing the 2300 hour of the day, check if PGE554G has already finished processing the next hour, and if so, did it generate data for the tile to be processed. If it did, put current RI for that tile/hour to NoRun and go to the next hour for processing. If RI start time is not 0000, then check if for the previous hour, of PGE554N is not completed yet (Status is not "RunOk", or "NoRun"). If still waiting to run, then immediately go to TryAgainLater.
Products Affected	VNP46A1G_NRT, VJ146A1G_NRT, VNP46A1_NRT, VJ146A1_NRT
Software Affected	PGE554 2.0.11
Processing String to Receive the Change	NRT
Downstream Product Effects	All VIIRS land products
Data Granules to be Used for Science Testing	The revised PGE554G/N was put onto nrt4 for testing starting 1/8/24. It has executed without issue, and has reduced overall number of RIs processed per data day and does complete the day faster than the previous version had.
Justification	Revisions were implemented after noting the slowness on nrt3/4 and wanting to remove any excess possible. Changes were suggested by Neal Devine and were shared with Zhuosen Wang to verify missing hourly products would not be an issue
Effective Date for Implementation of Change	New PGE554G/N, with only the change to the PGE554N_LoaderModule.pl, to go into both nrt3 and nrt4 for JPSS1 and NPP on 2/28/24. Recipe information: VNP/VJ1_L5dgnrtglu 2.0.26 PGE554G 2.0.11 VNP/VJ1L5dnrtglu 2.0.26 PGE554N 2.0.11
Status	Major algorithm development completed. Sadashiva Devadiga approved 06/21/2024. Sudipta Sakar implemented 03/01/2024.