Ionospheric electron density irregularities observed by satellite-to-satellite, dual-frequency, low-low doppler tracking link
Article first published online: 7 DEC 2012
Copyright 1984 by the American Geophysical Union.
Volume 19, Issue 4, pages 1098–1110, July-August 1984
How to Cite
1984), Ionospheric electron density irregularities observed by satellite-to-satellite, dual-frequency, low-low doppler tracking link, Radio Sci., 19(4), 1098–1110, doi:10.1029/RS019i004p01098., and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 24 JAN 1984
- Manuscript Received: 7 JUN 1983
A low-low, satellite-to-satellite, dual-frequency, Doppler tracking experiment was performed by the Harvard-Smithsonian Center for Astrophysics on the occasion of the 1975 Apollo-Soyuz Test Project. The data are analyzed here for irregularities in electron density at the altitude of 212 km. The differential Doppler data with the relative motion term removed are integrated to obtain a representation of the electron density variation along the satellite path. Well-known large-scale features such as the equatorial geomagnetic anomaly and day/night ionization level differences are clearly observed in the integrated data. The larger crest of the morning geomagnetic anomaly is seen to occur in the southern (winter) hemisphere in agreement with previous observations. In addition, a sharp peak in the electron density at the day-to-night transition point is observed in two consecutive revolutions. This effect may be due to the previously postulated atmospheric shock wave generated by supersonic motion of the terminator.