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Accession Number:
AD0612147
Title:
PRECISION MEASUREMENT OF VHF GAIN AND POINTING ACCURACY OF THE NRL 150-FOOT PARABOLIC ANTENNA.
Corporate Author:
NAVAL RESEARCH LAB WASHINGTON D C
Report Date:
1965-01-13
Abstract:
Radio astronomy techniques were employed by accurately determine the gain, pointing error, and temperature of the CBA, NRL 150-foot parabolic antenna system. A frequency of 146 Mhz was chosen for measurements corresponding to one of the few 4-Mhz wide channels in the mid-VHF spectrum free from commercial transmitters. The power gain at this frequency was measured as 34.9 db corresponding to an efficiency of 63 and evidenced a high performance antenna system for its class. This result also corroborated predictions of photogrammetric studies and other calibration checks on the dish. The pointing error was found to be 0.08 degrees which was well within the tolerance specified by the beam width at this frequency. Antenna temperature measurements corresponded closely to the expected sky-brightness temperature leading to the conclusion that broadband, man-made, RFI broadband interference did not significantly contribute to the continuum background noise. Author
Descriptive Note:
Interim rept.,
Pages:
0020
File Size:
0.00MB
