Explore how the GRACE-FO mission measures Earth's gravity using two satellites and precise laser ranging. This interactive simulator visualizes the line-of-sight (LOS) distance between satellites and how mass anomalies (mountains, water, dense rock, groundwater changes) change the satellites' separation and the local gravitational acceleration.
Use the right-side controls to change terrain type, toggle a second satellite, adjust satellite altitude and ground speed, and add groundwater anomalies. Observe real-time charts for satellite separation and computed gravity variations.
Perfect for high-school and undergraduate students learning about satellite geodesy, gravity mapping, and hydrology.