Though the original dataset was published by the ORNL DAAC, ongoing data updates have been taken over by GES DISC and can be found at the following link:
https://disc.gsfc.nasa.gov/datasets/FluxSatMGPP_L3_Daily_p05deg_2.2/summary
This dataset provides global gridded daily estimates of gross primary production (GPP) and uncertainties at 0.05 deg latitude by 0.05 deg longitude resolution for the period March 2000 to present.

Citation: Joanna Joiner (2025), Daily FluxSat GPP of biomass over Land, Based on MODIS Terra and Aqua adjusted reflectance Collection 6.1, on a Global 0.05 by 0.05 Degree Grid, Level 3 Version 2.2, Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center (GES DISC), Accessed: [Data Access Date], 10.5067/MEASURES/FLUXSAT/FLUXSATMGPP_L3_DAILY_P05DEG.2.2