Directory: general/cotrans/special/enp/

Contents

.pro files

enp_crib.pro

Procedure: enp_crib.pro Purpose: A crib showing how to transform data from ENP coordinates to GEI coordinates and vice versa E: sat to earth (in orbtial plane) N: east (in orbital plane) P: north (perpendicular to orbtial plane).

enp_matrix_make.pro

Procedure: enp_matrix_makePurpose: Creates a set of matrices that will rotate data from the input coordinate system into ENP.(ie creates a GEI->ENP transformation matrix), You can use the invert keyword on tvector rotate to go from ENP->GEI E: sat to earth (in orbtial plane) N: east (in orbital plane) P: north (perpendicular to orbtial plane).