| 1 | #!/usr/bin/env python |
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| 2 | from asap import * |
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| 3 | |
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| 4 | import os |
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| 5 | outdir = "./output" |
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| 6 | if not os.path.exists(outdir): |
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| 7 | os.mkdir(outdir) |
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| 8 | |
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| 9 | rcParams['verbose'] = 0 |
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| 10 | rcParams['plotter.ganged'] = 0 |
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| 11 | |
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| 12 | # Don't plot to the screen... |
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| 13 | del plotter |
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| 14 | plotter = asapplotter(False) |
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| 15 | |
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| 16 | print "Test of Parkes polarimetry (P484)" |
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| 17 | |
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| 18 | data_1665 = scantable('data/parkes-pol.rpf') |
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| 19 | data_1665.parallactify(True) |
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| 20 | data_1665.rotate_linpolphase(-45) |
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| 21 | data_1665.rotate_xyphase(-2) |
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| 22 | data_1665.set_unit('km/s') |
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| 23 | data_1665.set_freqframe('LSRK') |
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| 24 | |
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| 25 | # Look at the first scan |
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| 26 | selection = selector() |
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| 27 | selection.set_scans(0) |
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| 28 | data_1665.set_selection(selection) |
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| 29 | |
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| 30 | d1_5 = data_1665.copy() |
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| 31 | d1_7 = data_1665.copy() |
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| 32 | |
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| 33 | d1_7.set_restfreqs([1667.3590],'MHz') |
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| 34 | |
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| 35 | # Baseline both |
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| 36 | msk = d1_5.create_mask([-30,-25],[-5,0]) |
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| 37 | d1_5.poly_baseline(mask=msk,order=1) |
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| 38 | msk = d1_7.create_mask([-30,-25],[-5,0]) |
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| 39 | d1_7.poly_baseline(mask=msk,order=1) |
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| 40 | |
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| 41 | # merge the two scans back together into a new scantable |
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| 42 | plotscans = merge(d1_5,d1_7) |
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| 43 | toggle_verbose() |
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| 44 | plotscans.summary() |
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| 45 | toggle_verbose() |
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| 46 | del d1_5,d1_7,data_1665 |
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| 47 | # Plot the results |
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| 48 | plotter.set_mode('p','s') |
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| 49 | plotter.set_layout(2,1) |
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| 50 | plotter.set_range(-30,0) |
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| 51 | selection.reset() |
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| 52 | plotter.plot(plotscans) |
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| 53 | selection.set_polarisations(['I','Q', 'U', 'V']) |
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| 54 | plotter.set_selection(selection) |
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| 55 | plotter.save('output/parkes_iquv.png',dpi=80) |
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| 56 | selection.set_polarisations(['I','Plinear']) |
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| 57 | plotter.set_selection(selection) |
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| 58 | plotter.save('output/parkes_iplin.png',dpi=80) |
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| 59 | selection.set_polarisations(['RR','LL']) |
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| 60 | plotter.set_selection(selection) |
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| 61 | plotter.save('output/parkes_rrll.png',dpi=80) |
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| 62 | |
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| 63 | print "Parkes-Pol Test successful" |
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