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diff --git a/math/slalib/doc/geoc.hlp b/math/slalib/doc/geoc.hlp new file mode 100644 index 00000000..538474d1 --- /dev/null +++ b/math/slalib/doc/geoc.hlp @@ -0,0 +1,33 @@ +.help geoc Jun99 "Slalib Package" +.nf + + SUBROUTINE slGEOC (P, H, R, Z) + + - - - - - + G E O C + - - - - - + + Convert geodetic position to geocentric (double precision) + + Given: + P dp latitude (geodetic, radians) + H dp height above reference spheroid (geodetic, metres) + + Returned: + R dp distance from Earth axis (AU) + Z dp distance from plane of Earth equator (AU) + + Notes: + 1) Geocentric latitude can be obtained by evaluating ATAN2(Z,R). + 2) IAU 1976 constants are used. + + Reference: + Green,R.M., Spherical Astronomy, CUP 1985, p98. + + P.T.Wallace Starlink 4th October 1989 + + Copyright (C) 1995 Rutherford Appleton Laboratory + Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. + +.fi +.endhelp |