Measurement of rotational temperature at Kolhapur, India

oleh: G. K. Mukherjee, N. Parihar

Format: Article
Diterbitkan: Copernicus Publications 2004-09-01

Deskripsi

Measurements of the hydroxyl rotational temperature for the (8,3) Meinel band have been reported from the observations of the ratio of the relative intensities of P<sub>1</sub>(2) and P<sub>1</sub>(4) lines of the OH(8,3) band at Kolhapur (16.8&deg; N, 74.2&deg; E, dip lat. 10.6&deg; N) in India during the period 1 November 2002-29 April 2003 using tilting-filter photometers. Mean values of rotational temperature have been computed for 60 nights. The monthly mean value of temperature lies in the range 194(&plusmn;11)-208(&plusmn;18)K. The mean rotational temperature obtained from all the measurements was found to be 202&plusmn;15K. The results agree with other low-latitude measurements of rotational temperature using photometric airglow techniques. Quasi-periodic fluctuations with a period of about one to two hours have been prominent on many nights. Furthermore, the results show the general agreement between observations and model (MSIS-86) predictions.