This paper describes a JOSS computer program for the geodetic inverse solution which computes distances and azimuths between two geodetic positions. It uses the full capacity of JOSS (9 significant digits) and is good in most cases to within 0.1 meter in distance and 0.01 arc-second in direction. Comparisons with the precise program of the National Geodetic Survey are tabulated, and any desired values of ellipsoidal parameters may be used.
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