Accession Number : ADA194134

Title :   Wave Structures in Thermospheric Density from Satellite Electrostatic Triaxial Accelerometer Measurements.

Descriptive Note : Final rept.

Corporate Author : AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

PDF Url : ADA194134

Report Date : 04 Jun 1987

Pagination or Media Count : 30

Abstract : Density data from the Satellite Electrostatic Triaxial Accelerometer (SETA) experiment were spectrally analyzed by the Maximum Entropy Method (MEM). The purpose is to make available a technique by which the occurrence of wavelike structures in thermospheric densities can be quantitatively analyzed and correlated with various geophysical conditions, including the deposition of energy at high latitudes during geomagnetically disturbed conditions. Spectra were computed for typical magnetically quiet and active days during July 1983, and the relative occurrence of spectral peaks in wavelength ranges of large-scale (hundreds to thousands of kilometers) and medium-scale (tens to hundreds of kilometers) traveling ionospheric disturbances is examined as a function of local time and latitude. Keywords: Atmospheric density, Atmospheric wave structures, Maximum entropy method, Satellite accelerometers.

Descriptors :   *ACCELEROMETERS, *ATMOSPHERIC DENSITY, *THERMOSPHERE, ARTIFICIAL SATELLITES, ATMOSPHERES, DENSITY, DEPOSITION, ENTROPY, GEOPHYSICS, HIGH LATITUDES, IONOSPHERIC DISTURBANCES, LATITUDE, SPECTRA, STRUCTURES, TIME, WAVE PROPAGATION, WAVES, THREE DIMENSIONAL, ELECTROSTATICS

Subject Categories : Atmospheric Physics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE