function R=rotct2lg(lat,lon)% ROTCT2LG  Forms rotation matrix to convert from CT%   coordinate system to LG (NEU) coordinate system.%   If astronomic lat,lon input, then output is in%   local astronomic system. Non-vectorized. See also%   ROTLG2CT.% Version: 9 Jun 2000% Useage:  R=rotct2lg(lat,lon)% Input:   lat - lat of local system origin (rad)%          lon - lon of local system origin (rad)% Output:  R - Rotation matrix to convert from CT to LG (NEU)R=zeros(3,3);R(1,1)=-sin(lat).*cos(lon);R(1,2)=-sin(lat).*sin(lon);R(1,3)=cos(lat);R(2,1)=-sin(lon);R(2,2)=cos(lon);R(2,3)=0;R(3,1)=cos(lat).*cos(lon);R(3,2)=cos(lat).*sin(lon);R(3,3)=sin(lat);