5. Location of the Sun and Moon
The SUN-MOON program, prepared by E.R. Schiffmacher, gives the position of the Sun and
Moon for any observer latitude/longitude and selected time (in universal time, UT). The
solar and lunar local transit, rise and set times, and location with respect to the observer
at any given hour and minute (UT) are specified. The solar zenith angle, ?, given in this
program, is 90? minus the elevation angle of the Sun. The square-root of the cosine of this
solar zenith angle (called the Chapman function; see Section 2.3) is used when discussing the
ionospheric E-region ionization and electrical conductivity for the quiet-time dynamo
currents of thermospheric wind and tidal origin. To run the program, insert the disk in the
computer, select the drive letter for the disk, enter SUN-MOON and follow the directions.
An example screen is shown below.
Download this program
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