Citation
Abstract
Field measurements of reflector distortions, using the theodolite angle differences and fixed arc lengths from the vertex of the paraboloid, are based on apparent displacements normal to the line of sight. Two computing methods are described which use directions information from the structural computer analysis to upgrade the readings in the pathlength errors sense. Comparative rms values of the 1/2 pathlength errors, after a paraboloid best fit, resulting from the field measurements, the analytical analysis, and the rms equivalences to RF radio star measurements, are overlayed on an rms surface tolerance versus elevation angle chart for the 64-m-diam antenna. Close rms agreements allow designation of an error tolerance of +0.08 mm (0.003 in.) for the field-measured rms values.
Details
- Volume
- II
- Published
- April 15, 1971
- Pages
- 113–121
- File Size
- 663.4 KB