Topocentric North frame transformation matrix
M = CL_fr_topoNMat(orig)
Computes the frame transformation matrix (M) to the local topocentric North frame of some location defined by its elliptical (i.e. geodetic) coordinates.
By convention, multiplying M by coordinates relative to the initial frame yields coordinates relative to the topocentric North frame. The "initial" frame is by definition the frame in which the location is defined.
See Local frames for more details on the definition of local frames.
Origin of the Topocentric North frame in elliptical (geodetic) coordinates [rad;rad;m] (3xN)
Frame transformation matrix to the topocentric North frame (3x3xN)
1) CNES - MSLIB FORTRAN 90, Volume T (mt_def_topo_N)
CNES - DCT/SB
// Conversion from ECF to topoN (change of origin included): orig = [CL_deg2rad(0) ; CL_deg2rad(40) ; 0]; // ECF M = CL_fr_topoNMat(orig); pos = [ 1000.e3 ; 6578.e3 ; 2000.e3 ]; // ECF pos_orig = CL_co_ell2car(orig); // orig in cartesian coord. pos_topoN = M * (pos - pos_orig) |  |  |