Harris Priester Drag File
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The Harris-Priester Drag file (harris_priester_density_tables.dat) provides the data file for 1964 Harris–Priester Atmospheric density modeling. This model bases the density profile on a specified flux level for the radiation at the 10.7 cm wavelength. A table of integral flux values (measured at F10.7 = 65, 75, 100, 125, 150, 175, 200, 225, 250, 275 x10-22 W/m2/Hz) provides the atmospheric density for altitudes between 110 and 2000 kilometers. The data file also provides constant density values below 110 km.
Note: This file is not time dependent. It is not updated with each FreeFlyer release.
Below is a semi log plot showing the atmospheric density changes as a function of altitude when using the Harris Priester model. The data for this plot was generated in FreeFlyer for the density profile on Jul 01 2012 00:00:00.000.
Plot of the atmospheric density as a function of altitude from 110 km to 2000 km. The data used for the plot was taken directly from the atmosden.dat file included with FreeFlyer.
Harris Priester Drag File Format
The format of the Harris Priester Drag file included with FreeFlyer installation is shown below.