Title :
Radioholographic measurements and surface adjustment of the 64-meter reflector antenna in Medvezhy Ozera (Russia)
Author :
Kalinin, A.V. ; Poperechenko, B.A.
Author_Institution :
Inst. of Radiophys. Res., Acad. of Sci., Nizhny Novgorod, Russia
Abstract :
Radioholographic measurements and mirror surface adjustment were fulfilled for one of the largest Russian fully steerable radiotelescopes-64-meter mirror antenna at the space communication center Medvezhy Ozera near Moscow. The map of mirror distortions was restored with the use of 4 GHz band satellites signals. The surface RMS deviation was near 2 mm. The RMS difference of the maps measured under identical external conditions was about 0.1 mm. After partial adjustment of the mirror surface the antenna efficiency was increased from 0.51 to 0.65 at the 5-cm band. In addition, the stability of surface form was investigated for this antenna by means of comparison of surface maps measured under different external conditions and at different source elevations.
Keywords :
antenna radiation patterns; antenna testing; holography; radiotelescopes; reflector antennas; space communication links; spatial variables measurement; 4 GHz; 5 cm; 64 m; 64-meter reflector antenna; Medvezhy Ozera; Moscow; Russia; antenna efficiency; external conditions; mirror antenna; mirror distortions map; mirror surface adjustment; radioholographic measurements; satellites signals; source elevations; space communication center; steerable radiotelescopes; surface RMS deviation; surface maps; surface stability; Antenna measurements; Coordinate measuring machines; Distortion measurement; Extraterrestrial measurements; Holography; Mirrors; Power engineering; Reflector antennas; Satellite broadcasting; Wavelength measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.630225
