GRACE is/was the Earth-centric counterpart. I believe there may be a more modern variant as well. https://www.nasa.gov/mission_pages/Grace/overview/index.html

GRACE is/was the Earth-centric counterpart. I believe there may be a more modern variant as well. https://www.nasa.gov/mission_pages/Grace/overview/index.html https://www.nasa.gov/mission_pages/Grace/overview/index.html