Feature Request - Allow ECEF format for Station Position File

[vkbellis]

Currently, Station Position files are formatted:
%-----------------------------------------------------------
% station position file for rtklib
%
% latitude longitude height(elipsoidal) id name (NB. ellipsoidal correct spelling)
%-----------------------------------------------------------

Consider adding ECEF format
%-----------------------------------------------------------
% station position file for rtklib - ECEF format
%
% x y z id name
%-----------------------------------------------------------

Thank you.

Kind regards,

Kelly