A Note on the High-Latitude Density Bulge Inferred from Low-Altitude Satellite Drag Data.
Rept. for Jun-Oct 71,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Pagination or Media Count:
Drag data from the satellite OV1-15 are compared with the newest density model by Jacchi 1971a at altitudes below 200 km. Residuals between the observed and model density indicate the presence of a high-latitude density bulge, thereby confirming the results of a previous study which was based on an older Jacchia model 1970. Recent composition measurements in the polar regions have indicated that the N2 density is enhanced in a localized region, but not O. This anomaly persists even under geomagnetically quiet conditions. These results provide an explanation of why a polar-region density bulge has been observed consistently only at low altitudes 200 km where N2 is the major constituent, but not at higher altitudes where O predominates. Author
- Atmospheric Physics