GRACE Gravity Gradient Profile & Range-Rate Signal

This 2D-native counterpart to the 3D GRACE globe simulator plots the same point-mass gravity formula, g(x) = GΔm·h/(x²+h²)^1.5, as a live along-track profile instead of a rendered planet: as the twin-satellite pair sweeps across the chart, two markers trace GRACE-A and GRACE-B's positions on the curve, and a running strip-chart integrates their line-of-sight gravity difference into the cumulative range change the ranging instrument actually measures. Adjust the anomaly strength, orbit altitude and satellite baseline and watch the profile and range-rate signal respond exactly as the underlying physics predicts.