- bl2gk - Transformation: Geodaetic ellipsidic coordinaten to Gauß-Krüger-coordinaten (german convention)
- eph2xyz - Function to calculate satellite coordinates (xyz) from the ephemerietes of the satellite.
- gk2bl - Transformation: Gauß-Krüger-coordinates (convention of Germany) to geodaetic ellipsoidic coordinates
- gmf - Calculating the "global mapping function" (GMF).
- kepler - Calculate the excentric anomalie
- nutwinkel - Calculates the parameter of the nutation.
- praezwinkel - Calculates the parameter of the Precession.
- tropKor_sm - Calculates the tropospheric adjustment with assumed default values (Saastamoinen).
- xyz2blh - Transformation: Cartesian to ellipsoidic coordinates.