Comparison of orbit-averaged densities derived from accelerometer measurements onboard GRACE-FO to the density from space debris TLEs. (a) Average orbital altitude of GRACE-FO. (b) Average densities from GRACE-FO in black, from TLEs in red, and from the JB2008 model in blue. (c) Same as (b) but zoomed in on three geomagnetic storms in 2024. (d) Dst index with the three geomagnetic storms marked with arrows.