Production | MODAPS Services

MODAPS PCR 24-001

PCR Number	24-001
Date	2024-06-03
Initiator	Sudipta Sarkar
Abstract	PGE128 6.1.6 Integrated science code delivery. The C6-C7 blending is now carried out from 2024-03-31 to 2024-04-01. Fixed the problem related to incorrect InputPointer attribute in MOD02PC*KM. Integrated auto-formatting tools. Enabled dynamic staging of coeff files in LM script. If PGE is run for Terra, the LM script stages two sets of xcal coeff files. set 1: v1.13 the most recent version available in the database
Problem Statement	MCST had started phasing in C7 L1B changes as part of the C61 forward processing, since March 2023. These included implementation of C7 specific polarization correction, prior to estimation of gain and RVS, and other RSB changes. Thus, it had become imperative to revise the existing C61 land polarization correction algorithm, to update the different detrending and Terra/Aqua gain factors, given this introduction of upstream pre-gain polarization correction. The revised PGE can also look up newer versions of the OBPG coefficient files and use them in forward processing, in addition to the 2018 version that has been in use for most of C61 processing thus far.
Description of Change	Integrated science code changes, for accommodating the C61-C7 blending in. Enhanced the InputPointer to correctly show the full set of Terra/Aqua coefficient files. Enabled dynamic querying and staging of OBPG coefficient updates, in addition to the existing 2018 v1.13b set of files.
Products Affected	C61 MxD09 and all downstream MxD09 dependent products.
Software Affected	PGE128 6.1.6
Processing String to Receive the Change	Terra Forward Processing. Aqua Forward Processing. NRT.
Downstream Product Effects	C61 products: MxD09, MxD13, MxD15, MCD43, MxD10, MxD28
Data Granules to be Used for Science Testing	Two science tests were carried out to assess the science changes made to update the different detrending factors (AS 1967), and to confirm the dynamic look up of latest OBPG files (AS 1973). The test results were fully evaluated and confirmed by LDOPE and the concerned science team (Eric - AS 1967).
Justification	Needed to incorporate changes made in the L1B for C61 ? C7 blending in, and to allow for Land processing to make use of the latest set of OBPG files. Prior to this change, only a static set of files were used from 2018 (v1.13b).
Effective Date for Implementation of Change	The PGE128 v6.1.6 was placed in forward processing, starting 2024-06-03. The same was also placed on NRT on 2024-06-03.
Status	Sadashiva Devadiga approved 6/12/2024. Sudipta Sarkar implemented on 06/12/2024.