Improving Strapdown Airborne Gravimetry by Yaw Tracking Rotation Modulation

• DOI: 10.2112/si99-051.1
• Publication Date: 2020-05-14T21:07:00Z
• Authors: Shaokun Cai; Shuhai Lu; Lei Zhao; Minghao Wang; Ruihang Yu; Juliang Cao; Meiping Wu; Xiao Xu
• Keywords: Gravimetry

Cai, S.; Lu, Zhao, L.; Wang, M.; Yu, R.; Cao, J.; Wu, M., and Xu, X., 2020. Improving strapdown airborne gravimetry by yaw tracking rotation modulation. In: Zheng, C.W.; Q.; Zhan, C., Yang, S.B. (eds.), Air-Sea Interaction Coastal Environments of the Maritime Polar Silk Roads. Journal Research, Special Issue No. 99, pp. 373–381. Coconut Creek (Florida), ISSN 0749-0208.Strapdown is a classical method to obtain high quality gravity disturbance information. However, horizontal components vector are still potential for improvement. Residual error in navigation frame, originated from attitude accelerometer bias, main factor affecting accuracy gravimetry. Theoretical analysis actual repeat line data show that variation flight direction would change sign residual error, this will create biases results survey lines different direction. Therefore, keeping angle unchanged could eliminate effect gravimetry; be achieved single axis In paper, with modulation technique proposed conquer bias. Simulation errors reduced 3.45 mGal 4.59 2.48 1.77 after using improved scheme.