After 1 month in orbit, during the in‐orbit‐checkout phase, the noise on GRACE‐D accelerometer measurements elevated and resulted in systematical degradation of the data. For this reason, the GRACE‐D data need to be replaced by synthetic data, the so‐called transplant data, officially ...
of these three gravity space missions which demonstrate the robustness and the performances of this family of space instruments, allows a better optimization of the design of the accelerometer in terms of thermal stability and operation reliability for the near future missions as GRACE follow-on. The...
The error source that is being considered is the error in the satellite separation S(t) due to low-frequency errors in the accelerometer data or other causes. The first step is to carry out initial solutions for both the orbit of the midpoint between the two satellites and the separation ...
The role of accelerometer data calibration within GRACE gravity field recovery: Results from ITSG-Grace2016. Adv. Space Res. 58, 1597-1609. DOI: 10.1016/j.asr.2016.08.007.Klinger, B., Mayer-Gu¨rr, T.: The role of accelerometer data calibration within GRACE gravity field recovery: Results...
Time-variable gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GRACE-FO) missions have opened up a new avenue of opportunities for studying large-scale mass redistribution and transport in the Earth system. Over the past 19 years, GRACE/GRACE-FO...
accelerometer data from GRACE B for this period39(in November 2016 the GRACE B accelerometer had been switched off for the first time to save battery power and non-gravitational accelerations measured onboard GRACE A were transplanted to GRACE B). This affects the Antarctic regions in particular,...
The main idea behind the two-step approach is to reduce the number of iterations during gravity field recovery and therefore to save computational time. This is achieved by estimating appropriate a priori values for the initial satellite states as well as accelerometer calibration parameters using ...
GRACE-1, whose batteries remain healthy, will operate for the remainder of the year to collect calibration data. It will reenter in early 2018. "GRACE-1's remaining fuel will be used to complete previously planned maneuvers to calibrate and characterize its accelerometer to improve the final ...
Keywords GRACE · GRACE follow-on · Model uncertainties · Stochastic modeling 1 Introduction The Gravity Recovery And Climate Experiment (GRACE, Tapley et al. 2004) satellite mission was in orbit for over 15 years and provided an invaluable data record for climate and Earth system sciences. Its...
GRACE (Gravity Recovery And Climate Experiment) and its successor, GRACE-FO (-Followon) gravimetry satellite missions are designed to detect changes in Earth's global gravity field at monthly sampling and a spatial scale longer than 333 km (half-wavelength) (Tapley et al., 2004, Tapley et al...