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High accuracy in short ISS missions

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Abstract

Traditionally Inertial Surveying Systems (ISS) are used for missions of30 km to 100 km length. Today, a new type ofISS application is emanating from an increased need for survey control densification in urban areas often in connection with land information systems or cadastral surveys.

The accuracy requirements of urban surveys are usually high. The loss in accuracy caused by the coordinate transfer betweenIMU and ground marks is investigated and an offsetting system based on electronic tacheometers is proposed.

An offsetting system based on a Hewlett-PackardHP 3820A electronic tacheometer has been tested in Sydney (Australia) in connection with a vehicle mountedLITTON Auto-Surveyor SystemII. On missions over750 m (8 stations,25 minutes duration,3.5 minuteZUPT intervals, mean offset distances 9 metres) accuracies of37 mm (one sigma) in position and8 mm in elevation were achieved. Some improvements to theLITTON Auto-Surveyor SystemII are suggested which would improve the accuracies even further.

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  1. School of Surveying, University of New South Wales, P.O. Box 1, 2033, Kensington, NSW, (Australia)

    J. M. Rüeger

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  1. J. M. Rüeger
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Rüeger, J.M. High accuracy in short ISS missions. Bull. Geodesique 60, 155–167 (1986). https://doi.org/10.1007/BF02521015

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  • DOI: https://doi.org/10.1007/BF02521015

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