Physics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ijrsp..25...53s&link_type=abstract
Indian J. Radio Space Phys., Vol. 25, No. 1, p. 53 - 60
Physics
3
Radio Spectrographs: Sun, Solar Radio Bursts: Methods Of Observation
Scientific paper
A solar radio spectrograph, constructed to study the dynamic activities of the Sun, is described. It consists of the following four parts: (1) antenna system, (2) analog receiver system, (3) control system, and (4) data acquisition and recording system. The antenna system is a log periodic array with 8 dB gain and bandwidth of 50 MHz. The receiver system is a double stage superheterodyne receiver with a overall gain of 80 dB. The control system consists of an IEEE 488 GPIB card and a PC to control the sweeping frequency synthesizer which is acting as one of the local oscillators in the receiver. The data acquisition and recording system include a hi-speed data acquisition card and a PC for acquiring the observed data and recording the data for the reproduction of the spectra. The spectrograph is acquiring observational data on solar radio bursts in the bandwidth of 30 - 80 MHz, which is quite important for understanding the physics of flares and bursts. Its calibration and the the results of observations are also described.
Shanmugaraju Annamalai
Umapathy S.
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