Accession Number : AD0714993

Title :   Studies of Wavelike Variations in the Ionosphere.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Arendt,P. R. ; Gorman,F. J. , Jr. ; Soicher,H.

Report Date : SEP 1970

Pagination or Media Count : 24

Abstract : Determination of the true height of specific ionospheric plasma frequencies has been used for finding actual motions within the ionospheric plasma. The reported vertical soundings reveal a periodic variation in time at all bottomside altitudes. Spatial variations of this periodic structure have been observed at points separated by about 50 km. Daytime and nighttime periodic structures are different. Periodic variations of angle-of-arrival data of an oblique propagation experiment on a 1330-km circuit have been observed. The periodicities are related to spatial periodic electron density structure in the bottomside ionosphere. The oblique reflections had dominant azimuth periods in the order of 1/4, 1/2, and 1 hour. (Author)

Descriptors :   (*ATMOSPHERIC SOUNDING, ELECTRON DENSITY), (*IONOSPHERIC PROPAGATION, OSCILLATION), REFLECTION, PERIODIC VARIATIONS, REAL TIME, (U)REAL TIME

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE