PRECISION OF RADIO REFLECTOR SURFACES ADJUSTED FROM THEODOLITE TAPE MEASUREMENTS

We analyse the surface errors of five reflectors of millimetre and cen timetre wavelength radio telescopes which were initially adjusted from theodolite-tape measurements. The initial adjustment of the millimetr e-wavelength reflectors was later measured more precisely by radio hol ography. All reflectors had systematic ring-like zone deviations and s uperimposed random deviations of Gaussian distribution of which the di spersion increases towards the reflector rim. Such spatially nonunifor m surface errors are typical for adjustments from theodolite-tape meas urements.