Real time estimation of position and the gravity vector with an inertial survey system |
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| Authors: | J Wang Z Gao |
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| Institution: | (1) Dept. of Geodetic Science and Surveying, The Ohio State University, 1958 Neil Ave. Columbus OH43210, USA, US;(2) Dept. of Precision Instruments, Tsinghua University, Beijing 100084 P.R. China, CN |
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| Abstract: | Based on sine functions for fitting horizontal velocity errors in an inertial survey system and a step or slope function
approximation of the vertical deflection between stops, a positioning accuracy of 10 m (CEP) can be achieved with a car-borne
system – a modified -21 aircraft navigation system, with a 10 min travel period between Zero Velocity Update Times (ZUPTs) and a total 1.5 hour
survey time. A rough estimation of the vertical deflection can also be expected in real time out of the approach. Also a forward-backward-forward
run is presented which demonstrates determination of the gravity anomaly.
Received 10 March 1995; Accepted 8 July 1996 |
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