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A unified approach to post-mission processing of intertial data

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Abstract

The outpout of inertial survey systems is available to the user in two basic forms: as Kalman filtered information at updates or as integrated velocity and position information at regular time intervals. In case of the second data type, the post-mission processing starts with the approximation of the velocity error curve. This approximation is either based on a system error model as in Kalman filtering or uses curve fitting techniques. From there on, smoothing or adjustment procedures are used as further steps in the post-mission treatment of both data types.

A unified treatment of the various post-mission approaches starts with the formulation of appropriate error models of the system outputs. It is then possible to present all existing methods as intermediate steps of a rigorous adjustment procedure. This unified approach gives insight into the limitations of individual methods and provides a means to detect inconsistencies in post-mission processing strategies. An analysis of existing approaches is made and a new method, spectral decomposition, is treated in detail. Compared to the existing procedures, it has advantages with respect to a rigorous covariance propagation and blunder detection.

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  1. Division of Surveying Engineering, The University of Calgary, 2500 University Drive N.W., T2N 1N4, Calgary, Alberta, Canada

    K. P. Schwarz

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  1. K. P. Schwarz
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Schwarz, K.P. A unified approach to post-mission processing of intertial data. Bull. Geodesique 59, 33–54 (1985). https://doi.org/10.1007/BF02519338

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