Physics
Scientific paper
Oct 1964
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1964p%26ss...12..913e&link_type=abstract
Planetary and Space Science, Volume 12, Issue 10, p. 913-920.
Physics
2
Scientific paper
Studies of the electron density, electron and ion temperatures in the F-region have been made by means of ground-based radar observations at the Millstone Radar Observatory. A 70-m parabolic antenna directed vertically and a 2.5-MW pulse radar operating at 440 Mc/s have been employed for these measurements which were conducted for periods of 30 hours at approximately weekly intervals throughout 1963. Examination of the echo power as a function of height leads to a profile of electron density with height, provided that the electron and ion temperatures are the same (Te = Ti). Additional measurements of the spectra of the signals corresponding to different heights permit the ratio Te/Ti to be determined and, where this is different from unity, the observed profile can then be corrected for the effect on the scattering introduced by the inequality in temperature. The paper presents results of observations in July 1963. It was found that the ratio Te/Ti achieved a maximum value ~2.2 at a height of about 300 km soon after dawn. There was little change in the height dependence in this ratio throughout the daylight hours. At night Te/Ti was close to unity, but there remained a small difference near 300 km. The ion temperature was found to increase with height at all times, but above 500 km this may be due in part to the presence of an unknown amount of He+ ions which considerably affects the interpretation of the signal spectra. The selectron temperatures were largely independent of height above about 300 km.
Operated with support from the U.S. Air Force.
Evans John V.
Loewenthal Max
No associations
LandOfFree
Ionospheric backscatter observations 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 Ionospheric backscatter observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionospheric backscatter observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1610188