update manual to version 2Beta, aps_wrf_SAR delay computation based on surface pressure

Author: dbekaert

manual/TRAIN_manual.pdf

@@ -66,7 +66,7 @@
 % DB 	02/2016     Close netcdf files
 % DB    04/2016     Branch into weather model script and include merra too
 % SSS   04/2016     Clear variables such memory need is reduced
-
+% DB    07/2016     redefine hydrostatic delay to be based on surface pressure.
 
 fig_test = 1;           % when 1 show the dem as debug figure
 save_3D_delays = 0;     % When 1 saves the tropopsheric delays for each x,y and with height

matlab/aps_weather_model_SAR.m

@@ -35,7 +35,7 @@
     step_level = [1:length(Pressure_level)]';
 end
 
-% loopign though and use TEMP as inital check for nan
+% looping though and use TEMP as inital check for nan
 n_pixels = size(P,1)*size(P,2);
 for k=1:length(Pressure_level)
     ix_nan = isnan(Temp(:,:,step_level(k)));

matlab/aps_weather_model_nan_check.m

@@ -53,6 +53,7 @@
 % 27/09/2015    DB      Separate the DEM loading, ask for number of domains.
 % 28/09/2015    DB      Also save the delay computation for a grid or z to include Pirate compartibility.
 % 28/09/2015    DB      Include multi-core from matlab
+% 07/07/2016    DB      Redefine hydrostatic delay to be based on surface pressure.
 
 save_complete=0;        % save support information when 0
 
@@ -281,10 +282,20 @@
         ylist = ylist(ix);
         latlist = latlist(ix);
         lonlist = lonlist(ix);
-
         latlist=double(latlist);
         lonlist=double(lonlist);
 
+        numy = length(unique(latlist));
+        numx = length(unique(lonlist));
+        ulatlist = unique(latlist);
+        ulonlist = unique(lonlist);
+        uxlist = unique(xlist);
+        uylist = unique(ylist);
+        
+        
+
+       
+        
         if save_complete==0
             % saving the information for support plotting 
             wrf.wrf_lonlat = [lonlist latlist];
@@ -346,6 +357,14 @@
 
         %% Calculate Geometric Height, Z
         Z = (H.*Re)./(g/g0.*Re - H);
+        
+        % Find middle of scene to work out glocal and Rlocal for use later
+        midx = round(mean(uxlist));
+        midy = round(mean(uylist));
+        glocal = g(midy,midx,1);
+        Rlocal = Re(midy,midx,1);
+        
+        
 
         %% Find middle of scene to work out glocal and Rlocal for use later
         cdslices = maxdem/vertres +1;
@@ -354,7 +373,7 @@
         cdstack_wet = zeros(size(lonlist,1),cdslices);
 
         XI=(0:zincr:zref)';
-        %gh = glocal.*(Rlocal./(Rlocal+XI)).^2; %gravity with height for XI height range
+        gh = glocal.*(Rlocal./(Rlocal+XI)).^2; %gravity with height for XI height range
 
         % Interpolate Temp P and e from 0:20:15000 m
         % then integrate using trapz to estimate delay as function of height
@@ -383,8 +402,9 @@
             Lw = (10^-6).*-1*flipud(cumtrapz(flipud(XI),flipud(tmp1)));
             % L is zenith delay one way in metres
             tmp2 = k1.*YPI./YTI;
-            Ld = (10^-6).*-1*flipud(cumtrapz(flipud(XI),flipud(tmp2)));
-
+            %Ld = (10^-6).*-1*flipud(cumtrapz(flipud(XI),flipud(tmp2)));             % This is using P/T expression (Hanssen, 2001)
+            gm = glocal; 
+            Ld = (10^-6).*((k1*Rd/gm).*(YPI - YPI(zref/zincr +1)));                 % This is P0 expression (Hanssen, 2001)
 
             % Interpolate important part (i.e. total delay at elevations
             % less than maxdem) at high res i.e. vertres, and put in cdstack.