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(42S) Optical Alignment of the Spherical Antenna Measurement System - SlideRule - 01-12-2019 08:55 PM
An extract from the APPENDIX of Optical Alignment of the Spherical Antenna Measurement System, Defence Research Establishment, Ottawa (rep. num. 1316), NOV 1997.
Appendix A - Calculator Program "THEOD"
A.1 Introduction
This program processes the (azimuth and vertical) theodolite readings taken during the optical alignment of the spherical ORBIT positioner system …
The program also calculates the resulting centre angle (in sec's.) in an azimuth-vertical spherical space. The theodolite is at the centre of the sphere and the distance from the theodolite to the mirror is the sphere radius. The program calculates the length (in mm) at the mirror covered by the centre angle using a radius given in metres …
In addition the program calculates the coordinates where the second point (in the 0° -180° measurement method, in autocollimation mode) should be moved so the centre of the yellow circle (traced by the autocollimation cross) is displaced over the centre of the theodolite cross-hairs …
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