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Last change
on this file since 1997 was 1313, checked in by mar637, 18 years ago |
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scantable plugin to flag negative values in the bandpass (MOPS)
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File size:
1.0 KB
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| 1 | def _vanvleck_flag(scan, level=5.0):
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| 2 | """
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| 3 | Find level crossings and flag all data before (and after it).
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| 4 | This rectifies the problem caused by the MOPS bandpass being negative.
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| 5 | Use levels greater > 0.0 to get a better result.
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| 6 | """
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| 7 | sel = selector()
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| 8 | saved = scan.get_selection()
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| 9 | for i in xrange(scan.nrow()):
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| 10 | sel.reset()
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| 11 | sel.set_scans(scan.getscan(i))
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| 12 | sel.set_beams(scan.getbeam(i))
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| 13 | sel.set_ifs(scan.getif(i))
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| 14 | sel.set_polarisations(scan.getpol(i))
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| 15 | sel.set_cycles(scan.getcycle(i))
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| 16 | scan.set_selection(sel)
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| 17 | spec = scan._getspectrum()
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| 18 | msk = mask_not(scan._getmask())
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| 19 | n = len(msk)
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| 20 | modified = False
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| 21 | for j in xrange(n):
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| 22 | if j < n and spec[j] <= level:
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| 23 | msk[j] = 1
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| 24 | modified = True
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| 25 | if modified:
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| 26 | scan.flag(msk)
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| 27 | scan.set_selection(saved)
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| 28 |
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| 29 | if not "vanvleck_flag" in dir(scantable):
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| 30 | scantable.vanvleck_flag = _vanvleck_flag
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| 31 | del _vanvleck_flag
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