NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
The equatorial airglow and the ionospheric geomagnetic anomalyOGO D observations of OI (6300A) emissions reveal a global pattern in the equatorial airglow undetected from the ground-based observations. The post sunset emission rate of OI is generally asymmetrical with respect to the geomagnetic equator and shows no apparent correlation with the ultraviolet airglow (OI 1304 and 1356A) and F region electron density measured simultaneously from the same spacecraft. Both the ultraviolet airglow and the ion density measured in the altitude region of 450 km follow similar latitudinal variations and exhibit properties of the equatorial ionospheric anomaly. The asymmetry in OI emission can be attributed to the asymmetry in the height of the F 2 maximum inferred from the height of the maximum emission. From correlative studies of the airglow and the ionospheric measurements, the mechanisms for the ultraviolet and the 6300A emission are discussed in terms of the processes involving radiative and dissociative recombinations. A relationship between molecular oxygen density and the integrated OI emission rate is derived and the feasibility of using this relationship for estimating O2 density is discussed.
Document ID
19720021779
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Chandra, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Reed, E. I. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Troy, B. E., Jr. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Blamont, J. E. (CNRS Verrieres le Buisson, France)
Date Acquired
September 2, 2013
Publication Date
August 1, 1972
Subject Category
Geophysics
Report/Patent Number
NASA-TM-X-65978
X-621-72-260
Accession Number
72N29429
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available