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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).
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) |
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. |
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: OTF maps
Up: A typical (offline) data
Previous: A typical (offline) data
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Gildas manager
2014-07-01