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The Drag Temperature Model

CCMC Services available for DTM
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Model Developer(s)
Sean Bruinsma
Centre National d'Etudes Spatiales

Model Description
The Drag Temperature Model (DTM) is a semi-empirical model describing the temperature, density, and composition of the Earth’s thermosphere in the altitude range [120 - 1,500] km. DTM2013 was developed in the framework of the Advanced Thermosphere Modelling and Orbit Prediction project (ATMOP). The DTM2013 model is fitted to the high-resolution and high-precision accelerometer-inferred densities from the CHAMP and GRACE missions, but also to 2.5 years of GOCE data at 270 km. The low-resolution densities derived from orbit perturbation analysis as well as spectrometer data from Atmosphere Explorer and Dynamics Explorer have also been used, i.e., the same density data sets that were used in the construction of DTM2009 and DTM2012. This model is constructed using the 30 cm radio flux as solar proxy, and the 3-hour am index as geomagnetic proxy.

Model Input
The DTM uses solar radio flux, either F30 or F10.7 (daily and 81-day average values) and geomagnetic Kp index. The DTM at CCMC is run with F30 scaled to F10.7 and Kp.

Model Output
The model predicts total and partial densities (atomic hydrogen, helium, atomic oxygen, molecular nitrogen, and molecular oxygen in g/cm^3), as well as temperature and exospheric temperature, as a function of the user-provided values of date, location, solar flux and geomagnetic activity.

References and relevant publications

Relevant links

CCMC Contact(s)


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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