| [103] | 1 | from asap._asap import sdreader
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| 2 |
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| 3 | class reader(sdreader):
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| 4 | """
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| 5 | This class allows the user to import single dish files
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| 6 | (rpfits,sdfits,ms).
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| [113] | 7 | The reader reads in integrations from the file and reamins at
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| 8 | the fileposition afterwards.
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| [103] | 9 | Available functions are:
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| 10 |
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| 11 | read(integrations)
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| 12 | summary CURRENTLY DISABLED
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| 13 |
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| 14 | Example:
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| 15 | r = reader('/tmp/P389.rpf')
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| 16 | scans r.read() # reads in the complete file into 'scans'
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| 17 | print scans # summarises the contents
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| 18 | del r # destroys the reader
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| 19 | """
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| 20 |
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| [339] | 21 | def __init__(self, filename,unit=None, theif=None, thebeam=None):
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| [103] | 22 | """
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| 23 | Parameters:
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| 24 | filename: the name of an rpfits/sdfits/ms file on disk
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| [339] | 25 | unit: brightness unit; must be consistent with K or Jy.
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| 26 | The default is that a unit is set depending on
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| 27 | the telescope. Setting this over-rides that choice.
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| [333] | 28 | theif: select a specific IF (default is all)
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| 29 | thebeam: select a specific beam (default is all)
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| [103] | 30 | Example:
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| [333] | 31 | r = reader('/tmp/2001-09-01_0332_P363.rpf', theif=2)
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| [103] | 32 | """
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| [339] | 33 | if unit is None:
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| 34 | unit = ""
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| [333] | 35 | if theif is None:
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| 36 | theif = -1
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| 37 | if thebeam is None:
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| 38 | thebeam = -1
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| [339] | 39 | sdreader.__init__(self, filename, unit, theif, thebeam)
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| [103] | 40 |
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| 41 | def read(self,integrations=None):
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| 42 | """
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| 43 | Reads in an returns a specified sequence of integrations.
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| 44 | If no list is given all integrations a read in.
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| 45 | Parameters:
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| 46 | integrations: a 'range' of integration numbers, e.g.
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| 47 | range(100) or [0,1,2,3,4,10,11,100]
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| [113] | 48 | If not given (default) all integrations
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| 49 | are read in
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| [103] | 50 | Example:
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| 51 | r.read([0,1,2,3,4]) # reads in the first 5 integatrions
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| 52 | # NOT scans
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| 53 | r.read(range(100)) # read in the first 100 integrations
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| 54 | """
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| 55 | from asap import scantable
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| 56 | if integrations is None:
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| 57 | integrations = [-1]
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| [127] | 58 | print "Reading integrations from disk..."
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| [103] | 59 | sdreader.read(self,integrations)
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| 60 | tbl = sdreader.getdata(self)
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| 61 | return scantable(tbl)
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| 62 |
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| 63 | def summary(self):
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| [113] | 64 | """
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| 65 | Print a summary of all scans/integrations. This reads through the
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| 66 | whole file once.
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| 67 | Parameters:
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| 68 | None
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| 69 | Example:
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| 70 | r.summary()
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| 71 | """
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| [103] | 72 | sdreader.reset(self)
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| [113] | 73 | sdreader.read(self,[-1])
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| 74 | tbl = sdreader.getdata(self)
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| [103] | 75 | sdreader.reset(self)
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| 76 | print tbl.summary()
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| [113] | 77 | return
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