Determination of the coordinate system errors of PDS-1010M at PMO.

Details Determination of the coordinate system errors of PDS-1010M at PMO. Determination of the coordinate system errors of PDS-1010M at PMO.

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ppmto...8...64l&link_type=abstract

Publ. Purple Mt. Obs., Vol. 8, No. 1, p. 64 - 68

Physics

1

Coordinate Systems: Errors

Scientific paper

The coordinate system errors of the PDS at Purple Mountain Observatory (PMO) are determined with a piece of glass grid. It can be seen that besides regular fluctuations, there are some parabolic curvature in the errors of x-direction and varied skewness in the errors of y-direction. The analysis of the results indicates that this is mainly caused by the curvature of the y-direction rails, and the regular small fluctuations are due to the gears not being exactly round.

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