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The Jacchia-Bowman 2008 Empirical Thermospheric Density Model


CCMC Services available for JB2008
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Model Developer(s)
Bruce.R.Bowman

Model Description
The new empirical thermospheric density model, Jacchia-Bowman 2008, is developed as an improved revision to the Jacchia-Bowman 2006 model, which is based on the CIRA72 (COSPAR International Reference Atmosphere 1972) model. The CIRA72 model integrates the diffusion equations using the Jacchia 71 temperature formulation to compute density values for an input geographical location and solar conditions. New Driving solar indices are computed from on-orbit sensor data, which are used for the solar irradiances in the extreme through far ultraviolet, including X-ray and Lyman-? wavelengths. New exospheric temperature equations are developed to represent the thermospheric EUV and FUV heating. New semiannual density equations based on multiple 81-day average solar indices are used to represent the variations in the semiannual density cycle that result from EUV heating. Geomagnetic storm effects are modeled using the Dst index as the driver of global density changes.

Model Input
JB2008 requires solar inputs [F10.7, S10.7 (EUV), M10.7 (FUV), Y10.7 (X-ray and Lyman-?) indices, the centered 81-day average of the four indices] and geomagnetic inputs [Ap and Dst indices]

Model Output
JB2008 produces exospheric temperature, neutral temperature, and total mass density.

Relevant links

CCMC Contact(s)

301-286-4040

Developer Contact(s)

National Aeronautics and Space Administration Air Force Materiel Command Air Force Office of Scientific Research Air Force Research Laboratory Air Force Weather Agency NOAA Space Environment Center National Science Foundation Office of Naval Research

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