Spectral Observations of Solar Radio Bursts. I. Receiving Equipment.

Abstract

view Abstract Citations (12) References (1) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Spectral Observations of Solar Radio Bursts. I. Receiving Equipment. Thompson, A. R. Abstract The spectrum of solar radio bursts is observed at the Harvard Radio Astronomy Station, Fort Davis, Texas, over the frequency ranges 25-580 Mc/s and 2100-3900 Mc/s. The observations cover the period from sunrise to sunset of each day and were commenced in October, 1956, over three octaves of the present frequency range Six sweep-frequency receivers are used, each of which covers almost one octave of the frequency spectrum. The antennas for the frequencies below 100 Mc/s consist of broad-band dipoles mounted over a reflecting screen, and for the frequencies above 100 Mc/s, they consist of an equatorially mounted paraboloid with four primary feeds The outputs of the receivers are displayed on six cathode-ray tubes and are recorded photographically After sunset each day, the equipment is calibrated in intensity by recording signals of known power from a noise generator. A table relating the calibration-power levels to the intensity of equivalent solar signals at a number of frequencies is given in the paper. Publication: The Astrophysical Journal Pub Date: March 1961 DOI: 10.1086/147066 Bibcode: 1961ApJ...133..643T full text sources ADS | Related Materials (2) Part 2: 1962ApJ...135..138M Part 3: 1962ApJ...136..546T