Spectra of the Jupiter radio bursts
Abstract
BETWEEN March and September of 1973 and 1974, observations were made of the Jupiter radio bursts with the Llanherne filled-aperture low frequency radio telescope1 (650 m × 650 m). The signals over the frequency range 4-29 MHz were recorded directly on to six video tape recorders for 5 min each day near transit. Some observations at 15-17 MHz were also obtained between May and September 1972. Frequency-time spectra were subsequently made with a 256-channel real-time analyser with channels 10 kHz wide and separated by 10 kHz. The spectra were recorded on 35-mm film moving at a variety of speeds from 150 inch min-1 to 3 inch min-1. When records with higher frequency resolution (2 kHz) or time resolution (100 µs) were required, a time expansion spectrum analyser2 with 1,500 channels in a 3 MHz bandwidth was used. Over the observing period, tape records of the Jupiter radio bursts were obtained during about two-thirds of all transits, and so far about 80 h of video tape containing the bursts has been accumulated. Here I present a preliminary description of the chief properties of their spectra.
- Publication:
-
Nature
- Pub Date:
- February 1975
- DOI:
- 10.1038/253415a0
- Bibcode:
- 1975Natur.253..415E
- Keywords:
-
- Jupiter (Planet);
- Planetary Radiation;
- Radio Bursts;
- Radio Spectra;
- Frequency Distribution;
- Spectral Line Width;
- Spectrum Analysis;
- Time Dependence;
- Lunar and Planetary Exploration