Dec. 2010

Article Contents

Chinese Optics> 2010> 3(6): 653-658.

MA Qing-kun, QIAO Yan-feng. Offshore star calibration of electro-optical shipborne theodolite[J]. Chinese Optics, 2010, 3(6): 653-658.

Citation:

MA Qing-kun, QIAO Yan-feng. Offshore star calibration of electro-optical shipborne theodolite[J].Chinese Optics, 2010, 3(6): 653-658.

MA Qing-kun, QIAO Yan-feng. Offshore star calibration of electro-optical shipborne theodolite[J]. Chinese Optics, 2010, 3(6): 653-658.

Citation:

MA Qing-kun, QIAO Yan-feng. Offshore star calibration of electro-optical shipborne theodolite[J].Chinese Optics, 2010, 3(6): 653-658.

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Offshore star calibration of electro-optical shipborne theodolite

MA Qing-kun^1,2,
QIAO Yan-feng¹

1.
Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033,China;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100039,China

Received Date:21 Jun 2010
Rev Recd Date:13 Oct 2010
Publish Date:20 Dec 2010

Abstract

Abstract

In order to meet the requirements of offshore calibration for theodolites and to reduce calibration costs, this paper presents a calibration method of shipborne theodolites. Using this method, almost all the work can be carried out at sea. At first, based on FK5 ephemeris, the apparent position of a star can be calculated in real-time. After the coordinate transition, bootstrap values in the measurement system are ready. The algorithm of ship movement is used to keep the stablization of tracking at sea. At the same time, real-time data are acquired and recorded, and the axis errors and system errors of the theodolite can be calculated based on several algorithms. Experimental results indicate that the precisions of the calibration in dry-dock and the star calibration are very close. The tolerances of visual axis error, horizontal axis error and the vertical axis error are 0.015, 0.22 and 0.014, respectively. The star calibration agrees with the former results very well in system errors after calculations. It can satisfy the requirements of offshore calibrating of a ship-based theodolite.
- theodolite,
- offshore star calibration,
- calculation

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References (1)

References

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