PROCEDURE sphere_to_cart,r,theta,phi, x,y,z PURPOSE: transform from spherical to cartesian coordinates INPUTS: r, theta, phi (array or scalar) (Units are degrees) OUTPUTS: x, y, z (will have the same dimensions as r,theta,phi) KEYWORD OUTPUT: VEC: a named variable in which the vector [x,y,z] is returned CREATED BY: Davin Larson LAST MODIFICATION: @(#)sphere_to_cart.pro 1.6 02/11/01 NOTES: -90 < theta < 90 (latitude not co-lat) SEE ALSO: xyz_to_polar.pro