sband narrow cal values measured 16nov12

21nov12

Links to PLOTS:
  hcorcal:
     Fits to the Average CalDeflection/Tsys and Hcorcal in Kelvins  (.ps)  (.pdf): .
        
  othercals
       OtherCals/Hcorcal and the fits (.ps)  (.pdf):
       Over plotting all of the cals (in deg K) (.ps) (.pdf).
  diagnostics:
        Plotting Tsys measurements 2012 comparing old and new receivers. (.ps) (.pdf):
              

Links to SECTIONS:
Why the cals were remeasured.
Measuring the high correlated cal using blank sky and absorber
Measuring the other cals on blank sky relative to the high correlated cal.
Diagnostics


Why the cals were remeasured.

    The sbn cal values were measured on 16nov12 (absorber) and  19nov12 (on sky). They cals were remeasured because a new receiver was installed 28oct12.


Measuring the high correlated cal using sky and absorber: (top)

    The high correlated  cal value (diode 1 going to polA and polB) for sbn wide was measured on 16nov1`2  using  the  mock sky/absorber technique.
 These observations used the mock  spectrometer with the hardware winking cal.. 

    The temperatures used in the computation were:
 
Tabsorber 300.6K (81.3F avg temp sensor)
Tsky 5.2K
Treceiver 7K (from ganesh..hilltop)
Tscattered 11 K

    The recording and processing steps were:

    The results of the reduction are:

 
processing: x101/sbn/cals/nov12/hcorcal/sbninpfit.pro,sbncmp.pro,sbnplot.pro


Measuring the other cals using sky and the high correlated cal (top)

    The high correlated cal was measured (see above) using sky and absorber as the cold and  hot load . The other cals were then measured relative to the high correlated cal on 19nov12 around 9:45 am. The setup was the same as the hcorcal (see above) except  that each integration only lasted for 10 seconds (on sky). Most receivers  have hcorcal,hcal,hxcal,h90cal and well as the low cal versions of this. Sbn only has hcorcal and lcorcal. I repeated the hcorcal or lcorcal measurement so that we ended up with the same number of measurements. This let the offline reduction software run without too many changes. Since we had 4 copies of each ratio, i ended up averaging these.
The following cal sequence was run:     . The 25 hz hardware winking cal was used. 10 scans of 10 seconds each covered all the combinations..
the recording and processing steps were:

     
  The results of the reduction are:


Diagnostics:

Summary

processing: x101/sbn/cals/nov12/othercals/sbninpfit.pro,sbncmp.pro,sbnplot.pro


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