spaceangle

PURPOSE

SYNOPSIS

DESCRIPTION

 sa=spaceangle(az1,el1,az2,el2,units)

 Calculate the space angle between vectors az1,el1 and az2,el2

 If optional parameter units is 'deg' inputs and outputs in
 degrees. Otherwise radians

CROSS-REFERENCE INFORMATION

• antHealth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• beam_fittingSA CHECK BEFORE USING - WAS FIDDLING WITH NORMALISATION ACT 12/1/2011 %
• calcSourceDist %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• do_fit [fm,sa,gof]=do_fit(pars,freepars,obs,ide)
• do_fit_opt [fm,sa,gof]=do_fit(pars,freepars,obs,ide)
• gof_spaceangle gof=gof_spaceangle(tm,modfunc,oaz,oel,iaz,iel)
• plot_res plot_res(model,ide,obs,plottitle,gof)
• rad_set function rad_set(lststart,lstspace, lstfinish)
• rad_set_south function rad_set_south(lststart,lstspace, lstfinish)
• stepbystep_fit [fm,rmssa]=stepbystep_fit(om,ide,obs)
• calcTnoise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• calcTnoise_v2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• calcTnoise_v3 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• calcTsys %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• absCBF_AZEL %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• flagRFI_pos %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
• read_posflag %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

SOURCE CODE

0001 function sa=spaceangle(az1,el1,az2,el2,units)
0002 % sa=spaceangle(az1,el1,az2,el2,units)
0003 %
0004 % Calculate the space angle between vectors az1,el1 and az2,el2
0005 %
0006 % If optional parameter units is 'deg' inputs and outputs in
0007 % degrees. Otherwise radians
0008 
0009 if(~exist('units'))
0010   units='rad';
0011 end
0012 
0013 if(strcmp(units,'deg'))
0014   d2r=pi/180;
0015   az1=az1*d2r; az2=az2*d2r;
0016   el1=el1*d2r; el2=el2*d2r;
0017 end
0018 
0019 [x1,y1,z1]=sph2cart(az1,el1,1);
0020 [x2,y2,z2]=sph2cart(az2,el2,1);
0021 
0022 sa=acos(x1.*x2+y1.*y2+z1.*z2);
0023 
0024 if(strcmp(units,'deg'))
0025   sa=sa/d2r;
0026 end
0027 
0028 
0029  
0030 
0031