By default, after processing a calibration scan, MRTCAL will save the calibration products in the CLASS output file3. They will thus be available to the user when he opens the CLASS file for reading. For example, after calibrating iram30m-4mhz-20100930s200-imb.fits and iram30m-4mhz-20100930s201-imb.fits one can see:
MRTCAL> file in 09054.30m I-CONVERT, File is [Native] I-INPUT, 09054.30m successfully opened MRTCAL> find I-FIND, 14 observations found MRTCAL> list Current index contains: N;V Source Line Telescope Lambda Beta Sys Sca Sub 1;1 CALSKY NULL 30ME0HLI-4M1 -600.0 +0.0 Eq 200 1 2;1 CALSKY NULL 30ME0VLI-4M2 -600.0 +0.0 Eq 200 1 3;1 CONTROLD NULL 30ME0HLI-4M1 +0.0 +0.0 Eq 201 2 4;1 CONTROLD NULL 30ME0VLI-4M2 +0.0 +0.0 Eq 201 2 5;1 CONTROLD NULL 30ME0HLI-4M1 +0.0 +0.0 Eq 201 4 6;1 CONTROLD NULL 30ME0VLI-4M2 +0.0 +0.0 Eq 201 4 7;1 CONTROLD NULL 30ME0HLI-4M1 +0.0 +0.0 Eq 201 6 8;1 CONTROLD NULL 30ME0VLI-4M2 +0.0 +0.0 Eq 201 6 9;1 CONTROLD NULL 30ME0HLI-4M1 +0.0 +0.0 Eq 201 8 10;1 CONTROLD NULL 30ME0VLI-4M2 +0.0 +0.0 Eq 201 8 11;1 CONTROLD NULL 30ME0HLI-4M1 +0.0 +0.0 Eq 201 10 12;1 CONTROLD NULL 30ME0VLI-4M2 +0.0 +0.0 Eq 201 10 13;1 CONTROLD NULL 30ME0HLI-4M1 +0.0 +0.0 Eq 201 12 14;1 CONTROLD NULL 30ME0VLI-4M2 +0.0 +0.0 Eq 201 12
The calibration products are saved as CLASS spectra with source name CALSKY. There are as many of them as frontend-backend combination (telescope name in CLASS). In order to find only the science data, user has to find explicitly his source name, e.g.:
MRTCAL> find /source controld I-FIND, 12 observations found
A CALSKY entry is a spectrum providing the CalSky load as the main data (RY), plus a collection of Associated Arrays:
MRTCAL> find /source calsky I-FIND, 2 observations found MRTCAL> get first I-GET, Observation 1; Vers 1 Scan 200 MRTCAL> dump [...] ASSOCIATED ARRAYS ----------------------------------------- Number of associated arrays: 7 Associated array #1: CALAMBIENT Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 10158.63 9447.842 ... 17594.74 15591.32 Associated array #2: CALCOLD Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 5958.474 5238.263 ... 7394.842 7605.105 Associated array #3: TREC Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 304.3947 304.3947 ... 177.7052 177.7052 Associated array #4: TCAL Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 243.2139 243.2139 ... 249.4267 249.4267 Associated array #5: TSYS Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 424.9489 423.0339 ... 279.2844 283.7039 Associated array #6: TAUZEN Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 6.2096495E-02 6.2096495E-02 ... 5.5034418E-02 5.5034418E-02 Associated array #7: FLAG Unit: Format: -11 Bad: -1000.000 Dimensions: 1006 x 0 Data: 0.000000 0.000000 ... 0.000000 0.000000Those 8 arrays provide useful information as a function of frequency:
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