Significant upper thermospheric contribution to the O (1S) 557.7 nm dayglow emission: first ground based evidence
✍ Scribed by Alok Taori; R. Sridharan; D. Chakrabarty; N.K. Modi; R. Narayanan
- Book ID
- 104407456
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 605 KB
- Volume
- 65
- Category
- Article
- ISSN
- 1364-6826
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✦ Synopsis
Out of the two source regions of O ( 1 S) green line 557:7 nm emission namely the one in the lower thermosphere and the other in the upper thermosphere, the upper thermospheric source is known to contribute only 15 -20% of the total 557:7 nm volume emission during nighttime. On the other hand, successful, simultaneous ground based measurements of daytime 557:7 nm O ( 1 S) and 630:0 nm O ( 1 D) thermospheric emissions with the multiwavelength daytime photometer (MWDPM) reveal striking similarities in their variabilities, the inference being the dominance of thermospheric contribution in 557:7 nm O ( 1 S) emission throughout the day, in conformity with the space borne measurements made else where. The ÿrst set of ground-based measurements are presented and discussed.