5.1.1.0 sd.dosigref

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sd.dosigref - Function

5.1.1 Equivalent function with dosigref in GBTIDL
Description

The method calculates a quotient (sig-ref/ref * Tsys). Adopted from GBTIDL dosigref.

Arguments


Inputs
sig	On-source data as a scantable
	allowed:	scantable
	Default:
ref	Reference data as a scantable
	allowed:	scantable
	Default:
smooth	Width of box car smoothing for reference
	allowed:	int
	Default:	1 (no smoothing)
tsysval	User specified Tsys
	allowed:	float
	Default:	0.0 (use Tsys in the data)
tauval	User specified optical depth (required if tsysval is set)
	allowed:	float
	Default:	0.0

Returns
scantable

Example

   s = sd.scantable(’OrionS_rawACSmod’,average=False)
   sel = sd.selector()
   # calibration scans
   sel.set_types([srctype.poncal,srctype.poffcal])
   s.set_selection(sel)
   ssubon=s.copy()
   s.set_selection()
   sel.reset()
   # off-calibration scans
   sel.set_types([srctype.pson,srctype.psoff])
   s.set_selection(sel)
   ssuboff=s.copy()
   s.set_selection()
   sel.reset()
   # calibration
   cals = sd.dototalpower(ssubon,ssuboff)
   # ON scan
   sel.set_types(srctype.pson)
   cals.set_selection(sel)
   sig = cals.copy()
   cals.set_selection()
   sel.reset()
   # OFF scan
   sel.set_types(srctype.psoff)
   cals.set_selection(sel)
   ref = cals.copy()
   cals.set_selection()
   sel.reset()
   # get calibrated data
   ress = sd.dosigref(sig,ref,smooth=1)

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