Inertial Surveying Systems — Experience and Prognosis

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Abstract
Initially, the principle of inertial positioning is introduced and extensive new data from the Ottawa test net are used to discuss the state of the art. Two major problems presently limit the accuracy of the systems used in production work: heading sensitivity and the imperfect knowledge of the anomalous gravity field. An initial analysis of the new data indicates that the first is a software problem rather than a hardware problem. It appears that positioning of points along an L-shaped traverse can be done with the same accuracy as along a straight line. The second problem is assessed in a quantitative manner using simulation software. The impact of future hardware improvements on the accuracy of positioning is studied by simulating the error propagation process.

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