void sphlat_c ( SpiceDouble r,
SpiceDouble colat,
SpiceDouble lons,
SpiceDouble * radius,
SpiceDouble * lon,
SpiceDouble * lat )
Convert from spherical coordinates to latitudinal coordinates.
None.
CONVERSION, COORDINATES
VARIABLE I/O DESCRIPTION
  
r I Distance of the point from the origin.
colat I Angle of the point from positive z axis (radians).
lons I Angle of the point from the XZ plane (radians).
radius O Distance of a point from the origin
lon O Angle of the point from the XZ plane in radians
lat O Angle of the point from the XY plane in radians
r Distance of the point from the origin.
colat Angle between the vector from the origin to the point
and the positive z axis in radians.
lons Angle of the point from the XZ plane (radians).
radius Distance of a point from the origin
lon Angle of the point from the XZ plane in radians. `lon'
is set equal to `lons'.
lat Angle of the point from the XY plane in radians. `lat'
is computed as pi/2  `colat'.
None.
Error free.
None.
This routine returns the latitudinal coordinates of a point
whose position is input in spherical coordinates.
Latitudinal coordinates are defined by a distance from a central
reference point, an angle from a reference meridian, and an angle
above the equator of a sphere centered at the central reference
point.
Spherical coordinates are defined by a distance from a central
reference point, an angle from a reference meridian, and an angle
from the zaxis.
Latitude is obtained by subtracting colatitude from HALFPI()
Radius and longitude mean the same thing in both latitudinal
and spherical coordinates. The table below lists lat and
corresponding colat in terms of degrees.
lat colat
 
0 90
20 70
45 45
30 120
90 0
45 135
None.
None.
W.L. Taber (JPL)
CSPICE Version 1.0.1, 26JUL2016 (BVS)
Minor headers edits.
CSPICE Version 1.0.0, 08FEB1998 (EDW)
spherical to latitudinal coordinates
