function  rects = doa2rect(doas)%DOA2RECT Converts between DOA coordinates and rectangular coordinates.%%--------%Synopsis:%  rects = doa2rect(doas)%Description:%  Converts between DOA coordinates and rectangular coordinates.%%Output and Input:%  rects (Vector of PosT): Output rectangular coordinates.%  doas (Vector of DoaT): Input DOA coordinates.%%--------%Notations:%  Data type names are shown in parentheses and they start with a capital%  letter and end with a capital T. Data type definitions can be found in [1]%  or by "help dbtdata".%  [D] = This parameter can be omitted and then a default value is used.%  When the [D]-input parameter is not the last used in the call, it must be%  given the value [], i.e. an empty matrix.%  ... = There can be more parameters. They are explained under respective%  metod or choice.%%Known Bugs:%%References:%  [1]: Bj鰎klund S.: "DBT, A MATLAB Toolbox for Radar Signal Processing.%    Reference Guide", FOA-D--9x-00xxx-408--SE, To be published.%%See Also:%%   *  DBT, A Matlab Toolbox for Radar Signal Processing  *% (c) FOA 1994-2000. See the file dbtright.m for copyright notice.%%  Start        : 980526 Svante Bj鰎klund (svabj).%  Latest change: $Date: 2000/10/16 15:20:39 $ $Author: svabj $.%  $Revision: 1.4 $% *****************************************************************************r = 1;theta = doas(1,:);if (size(doas,1) == 2)  phi = doas(2,:);else  phi = zeros(1,size(doas,2));end%ifrCosPhi = r.*cos(phi);x = rCosPhi.*sin(theta);y = rCosPhi.*cos(theta);z = - r.*sin(phi);rects = [x; y; z];