Rank 40 documents GRACE-FO — Gravity Recovery and Climate Experiment Follow-On — the German-American twin-satellite mission that continued GRACE's revolutionary measurement of Earth's changing mass distribution. Launched 22 May 2018 aboard Falcon 9 from Vandenberg, the twin spacecraft fly in tandem at 601 km altitude separated by roughly 220 km, linked by microwave K-band ranging and a experimental laser ranging interferometer that improved precision over the original GRACE mission (2002–2017). JPL and GFZ Potsdam process monthly gravity field maps revealing groundwater depletion in California's Central Valley, Greenland and Antarctic ice sheet mass loss, and post-glacial rebound signals. GRACE-FO maintains the climate data record that turned invisible hydrological change into colour-coded global maps. Wallimilist renders twin satellites with red laser link, gravity anomaly Earth overlay, and navy arch frame exactly as the master PNG dictates — 2018 Earth Science kicker, cream-navy-gold palette, and curator copy on mass redistribution monitoring heritage.