Hi,all

I am trying to use qpack to retrieve the AMSUB measurements which Ta 
polarization is quasi-Vertical pol with the form of 
Tv*cos(sensor_los)^2+Th*sin(sensor_los)^2.

How to set the parameters of Q structure when I retrieve the atmosphere state 
of the quasi-Vertical polarization measurement provide?

I  try to hack the art_oem.m with yf and J as follows:

%--- Run ARTS --------------------------------------------------------

if nargout == 3
  do_j  = 1;
  cfile = R.cfile_yj;
else
  do_j  = 0;
  cfile = R.cfile_y;
end
%
arts( cfile );
%
y2 = xmlLoad( fullfile( R.workfolder, 'y.xml' ) );
I=y2(1:2:end);
Q=y2(2:2:end);
tv=I+Q;
th=I-Q;
y=tv*cos((180-theta)*pi/180)*cos((180-theta)*pi/180)+th*sin((180-theta)*pi/180)*sin((180-theta)*pi/180);
%
if do_j 
 
  % Load Jacobian
  J2 = xmlLoad( fullfile( R.workfolder, 'jacobian.xml' ) );
  IJ=J2(1:2:end,:);
  QJ=J2(2:2:end,:);
  VJ=IJ+QJ;
  HJ=IJ-QJ;
  J=VJ;
 
But I failed.


If somebody can give me some advise?


Thanks very much and best regards

Huang Yingzhu








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