Find co-variance of Q and U from a POL2 observation


Calculates the co-variance of Q and U in each map pixel for a POL2 observation. For a single pixel, the returned co-variance is:

sum( W_iRQ_iRU_i )/(Nsum( W_i ))


The input NDFs should be created by running makemap twice on the CALCQU output for a single POL2 observation - once to create a Q map and once to create a U map. On each invocation of makemap, the config should include " exportndf=(res,qua,noi,lut)" . This will causes two extra NDFs to be created by each invocation of makemap with suffixes " QT_con_lut" , " QT_con_res" , " UT_con_lut" and " UT_con_res" . These should be supplied as input to this command.


QLUT = NDF (Read)
3-D NDF holding Q LUT model (suffix " QT_con_lut" ).
QRES = NDF (Read)
3-D NDF holding Q residuals time-series (suffix " QT_con_res" ).
ULUT = NDF (Read)
3-D NDF holding U LUT model (suffix " UT_con_lut" ).
URES = NDF (Read)
3-D NDF holding U residuals time-series (suffix " UT_con_res" ).
Control the verbosity of the application. Values can be NONE (no messages), QUIET (minimal messages), NORMAL, VERBOSE, DEBUG or ALL. [NORMAL]
OUT = NDF (Write)
The output NDF - a 2-dimensional map holding the QU co-variance at each pixel.
REF = NDF (Read)
2-D NDF holding a Q or U map made from the same POL2 observation. This acts as a template to define the shape, size and WCS of the output NDF.