Crazy to think this all came about two years ago. Today in my FB feed I caught the link below. NASA announced that Grace 2's batteries are no longer storing enough power on recharges to maintain its ops. It's burning its remaining fuel to deotbit this winter. Grace 1 is being repurposed to refine its accelerometer calibration techniques and then it too will be deorbited next year.
Prolific Earth Gravity Satellites End Science Mission | NASA
Time for GRACE-FO.