Uploaded July 2022 | Updated September 2026, 2 hours ago
Gravitational reference sensors (GRS) for LISA and Taiji are extremely sensitive and therefore couple to the surrounding environment in rather complicated ways. Disturbances from satellite platforms or space environment may affect the performance of the GRS, and cause severe disruptions or extra noises in the data of TM interferometers. Through certain time delay interferometer (TDI) combinations, such data anomalies will affect the gravitational wave signal detections and parameter estimations in science data analysis. Especially, continuous disturbances from the scheduled satellite maneuvers, such as re-pointing of telecommunication antennas, orbit maneuvers etc., may result into the unwanted long-term data gaps. Trying to resolve this problem and to improve the robustness of the science measurements, we suggest here a novel approach to efficiently suppress the data anomalies or extra noises in one or both of the GRS systems onboard the same spacecraft. This is accomplished by introducing the almost “position noise free†TDI combinations $P_i$, where i=1,2,3 labels the spacecraft. In this talk, we discuss the principle of position noise suppressions of the $P_i$ combinations, and, with the numerical simulation tool TaijiSim-TDI, the high performance of this algorithm could be demonstrated and confirmed.
Authors: Wu Pengzhan (Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; Lanzhou University, Lanzhou, China), Xu Peng (Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; Lanzhou University, Lanzhou, China)
Lanzhou University, Lanzhou, China
Presenter: Wu Pengzhan
Gravitational reference sensors (GRS) for LISA and Taiji are extremely sensitive and therefore couple to the surrounding environment in rather complicated ways. Disturbances from satellite platforms or space environment may affect the performance of the GRS, and cause severe disruptions or extra noises in the data of TM interferometers. Through certain time delay interferometer (TDI) combinations, such data anomalies will affect the gravitational wave signal detections and parameter estimations in science data analysis. Especially, continuous disturbances from the scheduled satellite maneuvers, such as re-pointing of telecommunication antennas, orbit maneuvers etc., may result into the unwanted long-term data gaps. Trying to resolve this problem and to improve the robustness of the science measurements, we suggest here a novel approach to efficiently suppress the data anomalies or extra noises in one or both of the GRS systems onboard the same spacecraft. This is accomplished by introducing the almost “position noise free†TDI combinations $P_i$, where i=1,2,3 labels the spacecraft. In this talk, we discuss the principle of position noise suppressions of the $P_i$ combinations, and, with the numerical simulation tool TaijiSim-TDI, the high performance of this algorithm could be demonstrated and confirmed.
Authors: Wu Pengzhan (Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; Lanzhou University, Lanzhou, China), Xu Peng (Institute of Mechanics, Chinese Academy of Sciences, Beijing, China; Lanzhou University, Lanzhou, China)
Lanzhou University, Lanzhou, China
Presenter: Wu Pengzhan
