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Single-pointing observations

For the sake of a cookbook recipe, here is an example of a MIRA session.






file in "/ncsServer/mrt/ncs/data/2005-04-06" opens the input directory for reading
file out spectra.30m new opens output file for calibrated data
  (CLASS format by default)
find /observed 2005-09-06 /scan 5 15 only puts scans 5 to 15 from September 6
  into the index list.
 



... and yields the following list (with column 1 - scan number, column 2 - object, column 3 - observing procedure, column 4 switch mode, column 5 - backend name, column 6 - date of observation, column 7 - observation number) :



   5 VENUS      calibrat      beamSwitching      CONTI   2005-09-06     1
   6 VENUS      pointing      beamSwitching      CONTI   2005-09-06     2
   9 VENUS      focus         beamSwitching      CONTI   2005-09-06     3
  12 IRC+10216  calibrat      beamSwitching      4MHZ    2005-09-06     4
  13 IRC+10216  onOff         beamSwitching      4MHZ    2005-09-06     5
  14 IRC+10216  calibrat      beamSwitching      4MHZ    2005-09-06     6
  15 IRC+10216  onTheFly      totalPower         4MHZ    2005-09-06     7
 



The same list can be displayed with MIRA command LIST, which also allows to write it to an output file and not to the screen (option /OUTPUT), and to issue information on the frontends connected and spectral lines observed (option /LONG).





\fbox{\usebox{\savepar}} A typical data reduction session looks like this:



scan 5 loads scan 5 (calibration), computes the calibration paramters,
  and issues the following information:
  
FeBe Number              Frontend                   Backend
     
     1                     A100                      CONTI
     2                     B100                      CONTI
     3                     A230                      CONTI
     4                     B230                      CONTI
						   
				     
idFe THotLoad TColdLoad idBe  Pix  recTemp sysTemp calTemp tauZenith pwv
     ---- [Kelvin] ----            ------ [Kelvin] -------  [Neper]  [mm]
-------------------------------------------------------------------------
A100  295.199    86.000 CONTI  1     78.60  480.33  228.15    7.29   10.1
B100  295.199    88.000 CONTI  1     39.91  404.02  216.94    7.31   11.9
A230  295.199    86.000 CONTI  1    289.67 1515.64  350.22    0.39    5.6
B230  295.199    86.000 CONTI  1     91.00  800.64  305.18    0.43    6.2
scan 6 loads scan 6 (a pointing on Venus)






\fbox{\usebox{\savepar}}



cal all corrects all observations in the current scan for gains,
  applies the Ta* scale and subtracts off signals.
  N.B. CAL is NOT a prerequisite for solving pointings or foci.
solve 4 solves the pointing measurement, using the receiver B230, plots
  the results (Fig.1, 2), and writes an XML file for the control system.






\fbox{\usebox{\savepar}}





\fbox{\usebox{\savepar}}



scan 9 loads scan 9
solve 1 solve and plot the focus for receiver B230 (Fig.3), and writes an XML
  file for the control system.
scan 12 loads scan 12 (a calibration for the 4MHz filterbank), and issues
  

FeBe Number              Frontend                   Backend
     
     1                     A230                      4MHZ 
     2                     B230                      4MHZ 
     
       
idFe THotLoad TColdLoad idBe  Pix  recTemp sysTemp calTemp tauZenith pwv
     ---- [Kelvin] ----            ------ [Kelvin] -------  [Neper]  [mm]
-------------------------------------------------------------------------
A230  295.199    86.000 4MHZ   1    362.19 3018.86  240.79    0.40    5.8
B230  295.199    86.000 4MHZ   1    127.34 1658.64  213.17    0.42    6.0
scan 13 loads scan 13 (an on-off on IRC+10216)
view [1 /phases ON] plots the uncalibrated spectrum of the A230 receiver.
  The text in brackets is the default for \view (uncalibrated data).
view 1 /phases OFF You may want to look e.g. at the off-phase, too.
cal all calibrates the spectra of both the A230 and B230 receivers.
view [1 /signal] plots the calibrated spectrum for the A230 receiver (Fig.4).
  The text in brackets is the default for \view (calibrated data).
write /febe ALL writes the calibrated spectra into the output file for CLASS
  (starting with observing number 1)
 





MIRA offers possibilities to plot calibration counts, gainarrays of spectrometers, raw data (individual phases of the switch cycle), calibrated data (as spectra or pseudo-maps for OTF). For details, please have a look at section 4.
Figure 1: Example for a pointing solution (first step).
Figure 2: Example for a pointing solution (subscans coadded).
Figure 3: Example for a focus solution.
Figure 4: Example of a calibrated spectrum.

 


next up previous index
Next: OTF maps Up: A typical (offline) data Previous: A typical (offline) data   Index
Gildas manager 2018-11-19