Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Systematic Approach of Inertial Sensor Calibrations for Gravity Recovery Satellites and Its Application to Taiji-1 Mission

Haoyue Zhang
,
Peng Xu
* ORCID logo ,
Zongqi Ye
,
Dong Ye
ORCID logo ,
Li-E Qiang
,
Ziren Luo
,
Keqi Qi
,
Shaoxin Wang
,
Zhiming Cai
,
Zuolei Wang
,
Juangang Lei
,
Yueliang Wu
*
Version 1 : Received: 27 June 2023 / Approved: 28 June 2023 / Online: 29 June 2023 (05:51:31 CEST)

A peer-reviewed article of this Preprint also exists.

Zhang, H.; Xu, P.; Ye, Z.; Ye, D.; Qiang, L.-E.; Luo, Z.; Qi, K.; Wang, S.; Cai, Z.; Wang, Z.; Lei, J.; Wu, Y. A Systematic Approach for Inertial Sensor Calibration of Gravity Recovery Satellites and Its Application to Taiji-1 Mission. Remote Sens. 2023, 15, 3817. Zhang, H.; Xu, P.; Ye, Z.; Ye, D.; Qiang, L.-E.; Luo, Z.; Qi, K.; Wang, S.; Cai, Z.; Wang, Z.; Lei, J.; Wu, Y. A Systematic Approach for Inertial Sensor Calibration of Gravity Recovery Satellites and Its Application to Taiji-1 Mission. Remote Sens. 2023, 15, 3817.

Abstract

High-precision inertial sensors or accelerometers can provide us references of free-falling motions in gravitational field in space, and serve as the key payloads for gravity recovery missions. In this work, a systematic method of electrostatic inertial sensor calibrations for gravity recovery satellites is introduced, which is applied to and verified with the Taiji-1 mission. Taiji-1 is the first technology demonstration satellite of the ``Taiji Program in Space'', which, in its final extended phase in 2022, could be viewed as a gravity recovery satellite operating in the high-low satellite-to-satellite tracking mode. Based on the calibration principles, swing maneuvers with time span about 200 s and rolling maneuvers for 19 days were conducted by Taiji-1 in 2022. The inertial sensor's operating parameters including the scale factors, the center of mass offset vector and the intrinsic biased acceleration are precisely re-calibrated and are updated to the Taiji-1 science team. Data from one of the sensitive axis is re-processed with the updated operating parameters, and the performance is found to be slightly improved compared with former results. This approach could be of high reference value for the accelerometer or inertial sensor calibrations of the GFO, the Chinese GRACE-type mission, and the planned Next Generation Gravity Missions. This could also shed some light on the in-orbit calibrations of the ultra-precision inertial sensors for future GW space antennas because of the technological inheritance between these two generations of inertial sensors.

Keywords

Satellite Gravity; Inertial Sensor; Accelerometer; Calibration; Gravitational Wave Detection

Subject

Environmental and Earth Sciences, Remote Sensing

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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