Global Density Specification in the Lower Thermosphere
Abstract
Energetic inputs were derived from various satellite measurements and ground-based sensors for input into the Thermosphere General Circulation Model (TGCM) simulation of the magnetic storm occurring on March 22, 1979. The simulation was compared with thermospheric densities and winds measured from an Air Force satellite, and incoherent scatter radar measurements of thermospheric temperatures. An evaluation of the overall performance of the model and various physical processes accounting for discrepancies with data was performed. A FORTRAN program was developed to perform wave/spectral analyses of density data from the Satellite Electrostatic Triaxial Accelerometer (SETA) instrument using the maximum entropy method. The program was applied to a subset of available SETA data to illustrate typical wave characteristics for geomagnetically quiet and disturbed conditions. A climatological summary was performed of the average magnetic activity dependences of high-latitude thermospheric winds and densities below 200 km using SETA data from the March/April, 1979, period. Keywords: Density; Thermosphere; Winds; Waves; Magnetic activity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1988
- Accession Number
- ADA204699
Entities
People
- Jeffrey M. Forbes
Organizations
- Boston University