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Sensors 2018, 18(2), 360; https://doi.org/10.3390/s18020360

Strapdown Airborne Gravimetry Quality Assessment Method Based on Single Survey Line Data: A Study by SGA-WZ02 Gravimeter

College of Mechatronics and Automation, National University of Defense Technology, Changsha 410073, China
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Received: 8 January 2018 / Revised: 21 January 2018 / Accepted: 23 January 2018 / Published: 26 January 2018
(This article belongs to the Section Physical Sensors)
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Abstract

Quality assessment is an important part in the strapdown airborne gravimetry. Root mean square error (RMSE) evaluation method is a classical way to evaluate the gravimetry quality, but classical evaluation methods are preconditioned by extra flight or reference data. Thus, a method, which is able to largely conquer the premises of classical quality assessment methods and can be used in single survey line, has been developed in this paper. According to theoretical analysis, the method chooses the stability of two horizontal attitude angles, horizontal specific force and vertical specific force as the determinants of quality assessment method. The actual data, collected by SGA-WZ02 from 13 flights 21 lines in certain survey, was used to build the model and elaborate the method. To substantiate the performance of the quality assessment model, the model is applied in extra repeat line flights from two surveys. Compared with internal RMSE, standard deviation of assessment residuals are 0.23 mGal and 0.16 mGal in two surveys, which shows that the quality assessment method is reliable and stricter. The extra flights are not necessary by specially arranging the route of flights. The method, summarized from SGA-WZ02, is a feasible approach to assess gravimetry quality using single line data and is also suitable for other strapdown gravimeters. View Full-Text
Keywords: airborne gravimetry; strapdown inertial navigation system; quality assessment; single survey line airborne gravimetry; strapdown inertial navigation system; quality assessment; single survey line
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Wang, M.; Wu, M.; Cao, J.; Zhang, K.; Cai, S.; Yu, R. Strapdown Airborne Gravimetry Quality Assessment Method Based on Single Survey Line Data: A Study by SGA-WZ02 Gravimeter. Sensors 2018, 18, 360.

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