Radio Astronomy Explorer (RAE)-I. Observations of terrestrial radio noise

Details Radio Astronomy Explorer (RAE)-I. Observations of terrestrial radio noise Radio Astronomy Explorer (RAE)-I. Observations of terrestrial radio noise

Mar 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21..443h&link_type=abstract

Planetary and Space Science, Volume 21, Issue 3, p. 443-461.

Astronomy and Astrophysics

Astronomy

5

Scientific paper

Radio Astronomy Explorer (RAE) I data are analyzed to establish characteristics of HF terrestrial radio noise at an altitude of about 6000 km. Time and frequency variations in amplitude of the observed noise well above cosmic noise background are explained on the basis of temporal and spatial variations in ionospheric critical frequency coupled with those in noise source distributions. It is shown that terrestrial radio noise regularly breaks through the ionosphere and reaches RAE with magnitudes 15 dB and more above cosmic noise background, on frequencies above the F-layer critical frequency. A first description of the worldwide distribution of composite terrestrial noise on 9.18 MHz at 6000 km altitude between +/- 60° latitude is presented for a period in December 1968. Maximum magnitudes are observed with RAE on the dark side of the Earth over continental land masses; the noise is 20-40 dB lower over southern hemisphere oceans and 10-20 dB lower over northern hemisphere oceans. In the December period it appears that man made radio noise from cities dominated over the United States; thunderstorm activity contributed most noise over northern South America and groundbased transmissions on frequencies near 9.18 MHz were most intense over China and Eastern Europe.

Affiliated with

Also associated with

No associations

Rating

Radio Astronomy Explorer (RAE)-I. Observations of terrestrial radio noise does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radio Astronomy Explorer (RAE)-I. Observations of terrestrial radio noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio Astronomy Explorer (RAE)-I. Observations of terrestrial radio noise will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1639568