## Copyright (C) 2017 Jens Ahrensfeld
## 
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or
## (at your option) any later version.
## 
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
## 
## You should have received a copy of the GNU General Public License
## along with this program.  If not, see <http://www.gnu.org/licenses/>.

## -*- texinfo -*- 
## @deftypefn {Function File} {@var{retval} =} ltrack (@var{input1}, @var{input2})
##
## @seealso{}
## @end deftypefn

## Author: Jens Ahrensfeld <ahrensfeld@w2ess001vm>
## Created: 2017-05-29

function ltrack (d)

N = 101
phi = (-(N-1)/2:((N-1)/2))/(N-1)*pi/2;

k=1;
for k=1:length(d)
	err(:,k) = tan(phi)*d(k);
end

close all;
plot(phi, err); grid; xlabel('error(phi)')

err = (-(N-1)/2:((N-1)/2))/(N-1);
phi = [];
k=1;
for k=1:length(d)
	phi(:,k) = atan(err/d(k));
end

figure;
plot(err, 180*phi/pi); grid; xlabel('phi(err)')


endfunction