Accession Number:

ADA326239

Title:

Thermospheric Density Variability and Forecast Model Development.

Descriptive Note:

Scientific rept. no. 1,

Corporate Author:

COLORADO UNIV AT BOULDER DEPT OF AEROSPACE ENGINEERING SCIENCES

Personal Author(s):

• Forbes, Jeffrey M.
• Fuller-Rowell, Timothy

Report Date:

1997-01-15

Pagination or Media Count:

27.0

Abstract:

Thermospheric densities derived from SETA-1, SETA-2 and SETA-3 accelerometer data, and cross track winds from SETA-1, were analyzed to determine the nature of latitudinal structures at latitudes greater than 45 degrees. Distinct dependencies on magnetic activity level, local time, hemisphere and season are revealed. Empirical models such as MSIS or J70 do not represent the observed high latitude structures. The Coupled Thermosphere Ionosphere Model CTIM, however, is able to reproduce several of the salient high latitude structures revealed in the SETA data, albeit usually at about half the amplitude.

Descriptors:

• *GEOMAGNETISM
• *THERMOSPHERE
• *HIGH LATITUDES
• MAGNETIC FIELDS
• ELECTRIC FIELDS
• SEASONAL VARIATIONS
• AURORAE
• IONOSPHERIC MODELS
• MAGNETOSPHERE
• MAGNETIC STORMS
• GRAVITY WAVES
• CROSSWINDS

Subject Categories:

• Atmospheric Physics
• Geomagnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE