JB2006

Welcome to the website for the JB2006 empirical thermospheric density model.

The Jacchia-Bowman 2006 (JB2006) model was developed using the CIRA72 (Jacchia 71) model as the basis for the diffusion equations.  New solar indices have been used for the solar irradiances in the extreme and far ultraviolet wavelengths.  New exospheric temperature and semiannual density equations were created to represent the major thermospheric density variations.  Temperature correction equations were also developed for diurnal and latitudinal effects, and finally density correction factors have been included for model corrections required at high altitudes (1500- 4000 km).  This model has been validated through comparisons of accurate daily density drag data previously computed for numerous satellites.  For 400 km altitude the standard deviation of 16% for the Jacchia 1971 model has been reduced to 10% in the JB2006 model during periods of low geomagnetic storm activity.

Please follow the links to Indices, Code, Publications, Contacts, Figures, and SET for more detailed information.