Accession Number : AD0637610

Title :   PERIODICITIES IN THE JOVIAN DECAMETRIC RADIO EMISSION.

Descriptive Note : Technical note.

Corporate Author : BROWN ENGINEERING CO INC HUNTSVILLE ALA RESEARCH LABS

Personal Author(s) : Holmes,J. Randall

Report Date : JUL 1966

Pagination or Media Count : 106

Abstract : Autocorrelation and power spectral density techniques were applied to the Jovian activity index rate derived from data collected in Florida and Chile at 15, 18, and 22.2 MHz during the apparitions of 1960, 1961, 1962 and 1963. The long wavelength emission from Jupiter contains many periodic components. Those common to most of the data are the four 7-8, 17-18, 24-25, and 35-day periodicities. Attempts to isolate the cause of the irregularities have involved a search for correlation between these periodicities and the naturally occurring rotational periods of Jovian satellites and the radio sources which are presumably tied to the solid disk of the planet by its magnetic field. Periodicities in solar indices have also been examined. (Author)

Descriptors :   (*JUPITER(PLANET), *RADIO ASTRONOMY), VERY LOW FREQUENCY, EXTRATERRESTRIAL RADIO WAVES, PERIODIC VARIATIONS, STATISTICAL FUNCTIONS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE