filltsys Namespace Reference

Classes
class	TsysFillerBase
class	SimpleTsysFiller
class	TsysFiller
Functions
def	fillTsys
def	interpolateInFrequency
def	interpolateInTime
def	__checkCoverage
	if abc.min() <= self.abcsp.min() \ and abc.max() >= self.abcsp.max():
def	__checkChannels
	return (ea[0] <= eb[0] and ea[1] >= eb[1])
def	__edge
def	_constructAbcissa
def	getPolarizations
def	getSpecAbcissa
def	getTsysAbcissa
def	fillScanAveragedTsys
def	__extend
def	_search
Variables
tuple	_tb
dictionary	scaling

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Function Documentation

def filltsys.__checkChannels	(		self,
			a,
			b
	)		[private]

return (ea[0] <= eb[0] and ea[1] >= eb[1])

Check location of first and last channels

Definition at line 413 of file filltsys.py.

def filltsys.__checkCoverage	(		self,
			a,
			b
	)		[private]

if abc.min() <= self.abcsp.min() \ and abc.max() >= self.abcsp.max():

Check frequency coverage

Definition at line 398 of file filltsys.py.

def filltsys.__edge	(		self,
			abc
	)		[private]

return left and right edge values.

Definition at line 419 of file filltsys.py.

def filltsys.__extend	(		self,
			a,
			aref,
			b
	)		[private]

Extend spectra

Definition at line 564 of file filltsys.py.

def filltsys._constructAbcissa	(		self,
			ifno
	)		[private]

Construct abcissa array from REFPIX, REFVAL, INCREMENT

Definition at line 431 of file filltsys.py.

def filltsys._search	(		self,
			tcol,
			t,
			startpos = 0
	)		[private]

Simple search

Return minimum index that satisfies tcol[index] > t.
If such index couldn't be found, return -1.

tcol -- array
t -- target value
startpos -- optional start position (default 0)

Definition at line 610 of file filltsys.py.

References irc_cs_task_regression.max.

def filltsys.fillScanAveragedTsys	(		self,
			mode = 'linear'
	)

Fill Tsys

Tsys is averaged over scan first. Then, Tsys is
interpolated in time and frequency. Finally,
averaged and interpolated Tsys is used to fill
TSYS field for spectral data.

Definition at line 487 of file filltsys.py.

References interpolateInFrequency(), interpolateInTime(), and irc_cs_task_regression.max.

def filltsys.fillTsys	(		filename,
			specif,
			tsysif = None,
			mode = 'linear',
			extrap = False
	)

high level function to fill Tsys on spectral data

Tsys is processed along the following three steps:
   1. average within scan
   2. if possible, linearly interpolate in time.
   3. interpolate in frequency with specified mode

filename -- input filename
specif -- IFNO for spectral data
tsysif -- IFNO for calibration (Tsys) data
          default: None (try to find automatically)
          options: any integer
mode -- interpolation mode along frequency axis
        default: 'linear'
        options: 'linear',,'nearest','zero',
                 'slinear','quadratic','cubic'
                 any integer specifying an order of
                 spline interpolation

Definition at line 43 of file filltsys.py.

def filltsys.getPolarizations

(

self

)

Get list of POLNO's

Definition at line 450 of file filltsys.py.

def filltsys.getSpecAbcissa	(		self,
			unit = 'GHz'
	)

Get abcissa for spectral data

unit -- spectral unit
        default: 'GHz'
        options: 'channel', 'GHz', 'MHz', 'kHz', 'Hz'

Definition at line 459 of file filltsys.py.

def filltsys.getTsysAbcissa	(		self,
			unit = 'GHz'
	)

Get abcissa for Tsys data

unit -- spectral unit
        default: 'GHz'
        options: 'channel', 'GHz', 'MHz', 'kHz', 'Hz'

Definition at line 473 of file filltsys.py.

def filltsys.interpolateInFrequency	(		a,
			b,
			x,
			mode = 'linear'
	)

Interpolate 1d array 'b', which is based on axis 'a',
to 'x'.

Inputs:
   a -- base axis (1-d array)
   b -- base array (1-d array)
   x -- transfer axis (1-d array)
   mode -- interpolation mode
           default: 'linear'
           options: 'linear','nearest','zero',
                    'slinear','quadratic','cubic'

Returns:
   interpolated 1d array

Definition at line 82 of file filltsys.py.

References 3C391polim_regression.f.

Referenced by fillScanAveragedTsys().

def filltsys.interpolateInTime	(		t1,
			y1,
			t2,
			y2,
			t
	)

Linearly interpolate between y1 and y2, which are defined
at t1 and t2 respectively, to t, where t1 <= t <= t2.

Inputs:
   t1, t2 -- base time stamp
   y1, y2 -- the value at t1 and t2
             (either scalar or conformed numpy array)
   t -- transfer time stamp

Returns:
   interpolated value

Definition at line 111 of file filltsys.py.

Referenced by filltsys.SimpleTsysFiller.fillScanAveragedTsys(), and fillScanAveragedTsys().

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Variable Documentation

tuple filltsys._tb

Definition at line 26 of file filltsys.py.

dictionary filltsys.scaling

Definition at line 28 of file filltsys.py.