Modeling of O+(2P) dayglow emission
Abstract
O+(2P) emission can be used to infer the thermospheric atomic oxygen density hence model-ing this emission has a good potential reason. The accuracy of the emission rate of 732.0 nm depends mainly on the production and loss rates of O+(2P) in the thermosphere. However the quenching rate coefficient of O+(2P) by O and N2 given by various studies shows a large variation and hence leads in erroneous determination of O concentration and further in vali-dating the airglow model. The Volume emission rate (VER) of 732.0 nm dayglow emission is calculated using glow model with two different solar EUV flux coupled with the three differ-ent estimates of the quenching rate coefficients. The present study indicates that the VER's obtained using these quenching rate coefficients vary to a great extent due to large variation in quenching rate values. It is to be pointed here that value for quenching rate coefficient of O+(2P) ions by molecular nitrogen as obtained by Stephan et al.,(2003) agrees with the lab-oratory measurements of Li et al.,(1997) and as his values for O quenching agrees with that of Rusch et al.,(1977) it seems that the Chang et al.,(1993) values are out of line. However there is a dire need of more lab work concerning determination of quenching rate coefficient of O+(2P) by O or in getting observation of Volume emission rate of 732.0 nm emission which will ultimately lead in appropriate modeling of O+(2P) dayglow emission.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38..983U