Production | MODAPS Services

MODAPS PCR 26-001

PCR Number	26-001
Date	2026-02-02
Initiator	Carol Davidson
Abstract	Update land C61 PGEs with C7 specific changes: All land PGEs were updated to reflect collection specific metadata changes and correct SDS attributes scale, offset, fill value, unit and valid range and to adopt new file format of HDF5/HDF-EOS5 for gridded products. PGEs updated to read and process C7 version of the L1B and geolocation products.
Problem Statement	Generate improved version of the C6.1 MODIS land Tier 1 L3 Gridded and CMG products through Collection 7 reprocessing using the C7 versions of L1 and L2 products as input and land product specific changes recommended by the MODIS land science team.
Description of Change	Update land C61 PGEs with C7 specific changes: All land PGEs were updated to reflect collection specific metadata changes and correct SDS attributes scale, offset, fill value, unit and valid range and to adopt new file format of HDF5/HDF5-EOS. L3 PGEs updated to read and process C7 version of the L1B, geolocation and L2 products. No science changes introduced in C7 variations of Tier 1 L3 Land PGEs; just the transition in format.
Products Affected	All products
Software Affected	All products
Processing String to Receive the Change	Terra Forward Processing. Terra Reprocessing. Aqua Forward Processing. Aqua Reprocessing.
Downstream Product Effects	All products
Data Granules to be Used for Science Testing	Series of science test run generating global data from winter and summer period.
Justification	The Tier 1 L3 land products are being reprocessed through this reprocessing campaign (Collection 7) as potentially a final collection of MODIS products. This reprocessing will make use of improved C7 L1B and Geolocation, and will conform to the new file format of HDF5/HDF-EOS5. The C7 reprocessing when completed is expected to provide user with temporally consistent set of land product suite from the full mission period of Terra and Aqua.
Effective Date for Implementation of Change	Reprocessing of Tier 1 L3 land products began on February 2, 2026
Status	Sadashiva Devadiga approved 03/10/2026. Carol Davidson implemented on 02/02/2026.