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polconvert_CASA.py
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polconvert_CASA.py
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# Copyright (c) Ivan Marti-Vidal 2012-2022
# EU ALMA Regional Center. Nordic node.
# Universitat de Valencia (Spain)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/>,
# or write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# a. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# b. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the
# distribution.
# c. Neither the name of the author nor the names of contributors may
# be used to endorse or promote products derived from this software
# without specific prior written permission.
#
#
#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#
#
from __future__ import absolute_import
from __future__ import print_function
__version__ = "2.0.3 " # 7 characters
date = 'Jul 15, 2022'
################
# Import all necessary modules.
import os,sys,shutil,re
import gc
import time
import struct as stk
import scipy.optimize as spopt
import numpy as np
import pylab as pl
import datetime as dt
import pickle as pk
mypath = os.path.dirname(__file__)
sys.path.append(mypath)
import polconvert_standalone as PCONV
if True:
if sys.version_info.major < 3:
try:
from taskinit import *
tb = gentools(['tb'])[0]
except Exception as ex:
print('unable to load casa tools in python2\n\n')
raise ex
else:
try:
from casatools import ms as ms_casa
from casatools import table as tb_casa
tb = tb_casa()
except Exception as ex:
print('unable to load casa tools in python3\n\n')
raise ex
def polconvert(IDI='', OUTPUTIDI='', DiFXinput='', DiFXcalc='', doIF=[], linAntIdx=[1],
Range=[], ALMAant='', spw=-1, calAPP='', calAPPTime=[0.,5.], APPrefant='',
gains=[['NONE']], interpolation=[], gainmode=[], XYavgTime=0.0,
dterms=['NONE'], amp_norm=0.01, XYadd={}, XYdel={}, XYratio={},
usePcal={}, swapXY=[], swapRL=False, feedRotation=[],
correctParangle=False, IDI_conjugated=False, plotIF=-1,
plotRange=[], plotAnt=-1, excludeAnts=[], excludeBaselines=[],
doSolve=-1, solint=[1,1], doTest=True, npix=-1, solveAmp=True,
solveMethod='COBYLA', calstokes=[1.,0.,0.,0.], calfield=-1, saveArgs=False):
""" POLCONVERT - CASA INTERFACE VERSION 2.0.3.
Converts VLBI visibilities from mixed-polarization (linear-circular)
into circular basis. Works with single VLBI stations as well as with
calibrated phased arrays (i.e., phased ALMA).
IDI: Input FITS-IDI file with VLBI visibilities. It can also be a
direcotry containing SWIN files from DiFX.
OUTPUTIDI: Output FITS-IDI file (or SWIN directory). If equal to
IDI, the file(s) will be overwritten.
DiFXinput: If SWIN files are being converted, this must be the
*.input file used by DiFX.
DiFXcalc: If SWIN files are being converted, this must be the
*.calc file used by DiFX.
doIF = List of IFs to convert (starts from 1). Default means all.
linAntIdx: List of indices of the linear-polarization antennas
in the IDI/SWIN file (lowest index starts with 1).
It can also be a list of the antenna code names.
Range: Time range to convert (integer list; AIPS format). Default
means all data.
ALMAant: If ALMA has been used, this is the antenna table from
the MS with the intra-ALMA visibilities.
spw: Spectral window in ALMAvis that contains the VLBI band. If
negative, the program will derive it automatically.
calAPP: If ALMA has been used, this is the combined
ASDM_CALAPPPHASE table from the ASDM. The list of
measurement sets can also be given (so the table is
concatenated from all of them).
calAPPTime: Time shift and time tolerance (in sec) for the
CALAPPPHASE table obtained from the ASDM.
APPrefant: If not empty, re-reference the TelCal phases, assuming
that the X-Y phase-difference table provided in 'gains'
(see keyword below) uses APPrefant as the reference
antenna. Notice that the name of the gain table with
the X-Y phase differences has to contain the string
'.XY0'.
gains: Gain tables to pre-calibrate the linear-pol VLBI stations
(one list of gains per linear-pol station).
interpolation: Interpolation type to use (one per calibration
table). Tells whether to apply linear or nearest
interpolation. Default is to use linear for all
tables.
gainmode: Mode of gain calibration to impose (one per calibration
table). Default is 'T' for all tables, unless either
the string 'XY0', 'bandpass' or 'Gxyamp' appears in the
table name. The gain types can be either 'G' (i.e.,
split gains per polarization) or 'T' (i.e., combine
polarizations).
XYavgTime: Re-compute the G-mode gains by adding a time smoothing
of X-Y differences to the T-mode gains. Default is NOT
to do this (i.e., use the G-mode gains as given). If
positive, use a running time average with this size
(in seconds).
dterms: D-term tables to pre-calibrate the linear-pol VLBI
stations (one table per linear-pol station).
amp_norm: If positive, normalize the amplitude correction to the
X-Y average, and save the scaling factor (vs time) in
an external (ASCII) file (ANTAB format, assuming a
DPFU=amp_norm). If zero, or negative, apply the
amplitude correction as is.
XYadd: Add manually a phase between X and Y before conversion (in
deg.). A dictionary (antenna codes as keywords) with
elements set to either a list of one value per IF OR a
list of lists (one value per channel, for each IF).
XYdel: Add manually a multiband delay between X and Y before
conversion (in deg./chanel). A dicitonary (antenna codes
as keywords) with one value per linear-pol station.
XYratio: Add manually an amplitude ratio between X and Y before
conversion (R=X/Y). Follows the same format as XYadd. If
a negative value is given for an antenna, the X/Y ratio
will be estimated from its autocorrelations (the
spectrum for antenna i will be computed using a
running-median filter of width equal to -1/XYratio[i] of
the IF bandwidth). If 0.0 is given for an antenna, the
ratio will be estimated from the phasecal amplitudes (as
long as usePcal is True and there are pcal files
available; nto supported for FITS-IDI).
usePcal: Dictionary (antenna codes as keywords), whose elements
are booleans (i.e., one boolean per linear-polarization
station). If True, use the X-Y difference of phasecal
tones as an estimate of the X-Y cross-polarization
phase. Default means to NOT use the phasecals.
swapXY: If true, swap the X-Y channels (one boolean per antenna).
swapRL: Swap R-L of the OTHER antenna(s) when plotting the
fringes.
feedRotation: Rotation angle of the feed (one value per antenna,
in degrees). Default means zero degrees (so that
X is truly horizontal for the linear-pol.
antennas). These angles are used in the
gain-solver step.
correctParangle: If True, the correction for parallactic angle
is applied to the converted antenna(s).
IDI_conjugated: Assume a swap in the baseline defintion (i.e.,
conjugation) of the FITS-IDI file. This has NO
effect on SWIN files.
plotIF: IF index(es) to plot. Default means to NOT plot. An
empty list, [], means to plot ALL IFs being converted
(but do not forget to set plotRange and plotAnt!)
plotRange: Time range to plot (integer list; AIPS format).
Default means to NOT plot.
plotAnt: Index of the other antenna in the baseline to plot.
Default means to NOT plot.
excludeAnts: List of antennas (i.e., list of antenna codenames)
to NOT use in the cross-polarization gain
estimates.
excludeBaselines: List of baselines (i.e., a list of lists of
two antenna codenames) to NOT use in the
cross-polarization gain estimates.
doSolve: If negative, do not estimate the cross-polarization
gains. If positive or zero, estimate the gains using
a Global Cross-Pol Fringe Fitting (GCPFF). The gains
are fitted with an error function (Chi Square)
defined as:
sum( doSolve*(RR/LL-1)^2 + (RL^2 + LR^2) ),
so that doSolve=0 minimizes the cross-hand
polarizations (so it assumes a small linear
polarization of the source), whereas doSolve >> 1
assumes a negligible Stokes V.
solint: If solint[0] null or negative, solve the
cross-polarization phase plus a multi-band delay (MBD).
If not, solve in bandpass mode by averaging solint[0]
channels per solution. Divide the solution time range
(per scan) in solint[1] chunks (i.e., in solint[1]
subscans). I.e., if solint[1]==1, the fringes are fully
averaged in time for each scan (but corrected for the
scan fringe rates) before the GPLFF condition is
computed. solint[2] is the minimum time jump (in
seconds) to split the data into different scans
(default: 50 seconds).
doTest: If true, only compute (and eventually plot), the data,
but leave OUTPUTIDI untouched.
npix: Number of pixels for the fringe plots.
solveAmp: If the cross-polarization gains are being estimated,
solve also for the X/Y amplitude ratios.
solveMethod: Method for the minimization of the Chi squared in
the GCPFF. Can be, for instance: 'COBYLA'.
calstokes: Stokes parameters, [I,Q,U,V] of the calibrator (of
course, this is only used if doSolve is not negative).
The total intensity is not needed in the calibration
(i.e., calstokes[0] can be left to 1.0, so that the
other parameters will correspond to fractional
polarization).
calfield: If not negative, field ID of the calibrator (useful
if a time range covering several scans is being used
in the GCPFF). If negative, use all data in the time
range, regardless of the field ID.
"""
############################################
# this turns into the verbosity argument of _PolConvert.so
print('Entered polconvert_CASA::polconvert()')
DEBUG = False
if 'POLCONVERTDEBUG' in os.environ:
if os.environ['POLCONVERTDEBUG'] == 'True': DEBUG = True
else: DEBUG = False
print('DEBUG setting is ' + str(DEBUG))
print('__name__ is ' + __name__)
# Auxiliary function: print error and raise exception:
def printError(msg):
print(msg,'\n')
lfile = open("PolConvert.log","a")
print('\n'+msg+'\n', file=lfile)
lfile.close()
sys.stdout.flush()
raise Exception(msg)
# Auxiliary function: print message (terminal and log):
def printMsg(msg, doterm=True, dolog=True):
if doterm:
print(msg)
if dolog:
lfile = open("PolConvert.log","a")
print(msg,file=lfile)
lfile.close()
# Auxiliary function: Geometric Median of a complex number:
def geoMedian(Window, method='phasor'):
WinData = np.array(Window)
# Simplest approach (Amp & Phase separate). Assume NO WRAPS in phase:
pAvg = np.median(np.abs(WinData))*np.exp(1.j*np.median(np.angle(WinData)))
if method=='phasor':
return pAvg
# A bit more complicated (point of minimum distance).
elif method=='Torricelli':
def L1Dist(p):
return np.sum(np.abs(WinData-p[0]-1.j*p[1]))
Torr = spopt.minimize(L1Dist, [pAvg.real, pAvg.imag], method='COBYLA')
return Torr.x[0] + 1.j*Torr.x[1]
# Auxiliary function: Smooth the X-Y difference of G-mode gains
# using a running average:
def XYsmooth(GAINTABLE, DTIME, SPW, IANT=-1):
os.system('rm -rf %s.XYsmooth.PolConvert'%GAINTABLE)
try:
os.system('cp -r %s %s.XYsmooth.PolConvert'%(GAINTABLE,GAINTABLE))
tb.open('%s.XYsmooth.PolConvert/ANTENNA'%GAINTABLE)
GallAnts = tb.getcol('NAME')
tb.close()
if IANT>=0:
allAnts = [IANT]
else:
allAnts = list(range(len(GallAnts)))
tb.open('%s.XYsmooth.PolConvert'%GAINTABLE,nomodify=False)
Gtimes = tb.getcol('TIME')
Gants = tb.getcol('ANTENNA1')
Gspws = tb.getcol('SPECTRAL_WINDOW_ID')
Gflg = np.logical_not(tb.getcol('FLAG'))
if np.shape(Gflg)[0] > 1:
isT = 1
else:
isT = 0
# print isT, np.shape(Gflg)
Ggood = np.logical_and(Gflg[0,0,:],Gflg[isT,0,:])
Mask = np.logical_and(Gspws == SPW, Ggood)
Ggains = tb.getcol('CPARAM')
except:
printError('ERROR: Bad gain table %s!'%GAINTABLE)
# Get the X-Y cross-phase gain:
GDiff = Ggains[0,0,:]/Ggains[isT,0,:]
# Get the polarization-independent gain:
TMode = Ggains[0,0,:]*Ggains[isT,0,:]
# Smooth them:
for iant in allAnts:
Mask2 = np.where(np.logical_and(Mask,Gants==iant))[0]
sys.stdout.write('\rSmoothing X-Y difference for antenna %s (%i of %i) '%(GallAnts[iant],iant+1,len(GallAnts)))
sys.stdout.flush()
for tii,ti in enumerate(Mask2):
Window = []
tij = tii
while tij>=0 and np.abs(Gtimes[ti]-Gtimes[Mask2[tij]])<DTIME/2.:
Window.append(GDiff[Mask2[tij]])
tij -= 1
tij = tii+1
while tij<len(Mask2) and np.abs(Gtimes[ti]-Gtimes[Mask2[tij]])<DTIME/2.:
Window.append(GDiff[Mask2[tij]])
tij += 1
# Median (normalized):
AvgDiff = geoMedian(Window)
AvgDiff /= np.abs(AvgDiff)
Ggains[0,0,ti] = np.sqrt(TMode[ti]*AvgDiff)
Ggains[isT,0,ti] = np.sqrt(TMode[ti]/AvgDiff)
# Update the table:
tb.putcol('CPARAM',Ggains)
tb.close()
print('\nDONE!\n\n')
# Auxiliary function: Re-reference XY-phases to
# another ALMA refant, using the CalAPPPhase table:
def ReReference(CALAPPPHASE,XY0,SPW,REFANT):
printMsg("\n\n GOING TO RE-REFERENCE X-Y PHASES TO %s.\n\n"%REFANT)
DTMax = 180. # Minimum time gap (sec) to assume that TelCal has been reset.
# Figure out the baseband:
tb.open('%s/SPECTRAL_WINDOW'%XY0)
try:
spname = tb.getcol('NAME')[SPW]
BB = [ii for ii in spname.split('#') if "BB_" in ii][0]
except:
printError("\n ERROR: BAD NAME FOR SPW %i IN TABLE %s\n"%(SPW,XY0))
tb.close()
# Read TelCal's phases:
tb.open(CALAPPPHASE)
IMAX = np.argmax(tb.getcol('numPhasedAntennas'))
ANT = list(tb.getcell('phasedAntennas',IMAX))
try:
REFIDX = ANT.index(REFANT)
except:
printError("\n\n ERROR: ANTENNA %s IS NOT IN CALAPP-PHASE TABLE!"%REFANT)
ti = tb.getcol('startValidTime')
bb = tb.getcol('basebandName')
Tsort = np.argsort(ti)
Torder = np.copy(ti[Tsort])
UT = 24.*(Torder/86400.-int(Torder[0]/86400.))
# Arrange phases of the REFANT:
Gains = []
for i in range(len(ti)):
aux = list(tb.getcell('phasedAntennas', rownr = i))
try:
REFI = aux.index(REFANT)
aux2 = tb.getcell('phaseValues', rownr = i)
NIF = tb.getcell('numChannels', rownr = i)
Gains.append([aux2[NIF*REFI:NIF*(REFI+1)],aux2[NIF*(REFI+len(aux)):NIF*(REFI+len(aux)+1)]])
except:
printMsg("WARNING: ANTENNA %s NOT IN LIST OF PHASE ANTENNAS AT TIME %.1f.\n THE RESULTING X-Y PHASES MAY BE *WRONG* AT THIS TIME!"%(REFANT,ti))
Gains.append([np.zeros(NIF),np.zeros(NIF)])
GainsA = np.array(Gains)
# Filter phases for the SPW:
b1 = bb[Tsort] == BB
Nchan = np.shape(GainsA)[-1]
IX = np.copy(GainsA[Tsort,:][b1,0,:])
IY = np.copy(GainsA[Tsort,:][b1,1,:])
tb.close()
Mask = np.where(np.logical_and(Torder[b1][1:]-Torder[b1][:-1]>DTMax,IX[:-1,0]!=0.0))
# Plot TelCal phases for REFANT:
plfig = pl.figure()
plsub = plfig.add_subplot(111)
symb = ['or','og','ob','ok','om','oy','^r','^g','^b','^k','^m','^y']
XYDiff = []
AvXY = []
for ni in range(Nchan):
IntX = IX[1:,ni][Mask]
IntY = IY[1:,ni][Mask]
XYDiff.append(np.mod(IntX-IntY,2.*np.pi))
# We take the time MEDIAN as the best XY-phase estimate for the REFANT:
AvXY.append(np.median(XYDiff[-1]))
plsub.plot(UT[b1][1:][Mask],XYDiff[-1]*180./np.pi,symb[ni],label='CH %i'%(ni+1))
printMsg('For antenna %s, Chan %i, found TelCal median X-Y phase of %.1f deg.'%(REFANT,ni+1,180./np.pi*AvXY[-1]))
pl.legend(numpoints=1)
plsub.set_xlabel('UT (h)')
plsub.set_ylabel('X-Y phase (deg.)')
plsub.set_xlim((0,24))
pl.title('TelCal X-Y phases for new REFANT: %s'%REFANT)
pl.savefig('%s.RE-REFERENCING.png'%CALAPPPHASE)
# Correct XY=phase table:
printMsg("\n\n ADDING PHASES TO NEW XY0 TABLE\n\n")
os.system("rm -rf %s.REFANT_%s"%(XY0,REFANT))
os.system("cp -r %s %s.REFANT_%s"%(XY0,XY0,REFANT))
tb.open("%s.REFANT_%s"%(XY0,REFANT),nomodify=False)
spwi = tb.getcol('SPECTRAL_WINDOW_ID')
XYData = []
Mask = spwi==SPW
for si in np.where(Mask)[0]:
XYData.append(tb.getcell("CPARAM",si))
XYData = np.array(XYData)
# XYData = tb.getcol("CPARAM")
# Mask = spwi==SPW
NNu = np.shape(XYData)[1]
NuPerChan = NNu/Nchan
for ni in range(Nchan):
XYData[0,ni*NuPerChan:(ni+1)*NuPerChan,Mask] *= np.exp(-1.j*(AvXY[ni]))
for sii,si in enumerate(np.where(Mask)[0]):
tb.putcell("CPARAM",si,XYData[sii])
# tb.putcol("CPARAM",XYData)
tb.close()
# Plot new vs. old XY-phases:
Idx = np.where(Mask)[0][0]
tb.open(XY0)
XOrig = tb.getcell("CPARAM",Idx)[0,:]
YOrig = tb.getcell("CPARAM",Idx)[1,:]
tb.close()
plfig.clf()
plsub = plfig.add_subplot(111)
plsub.plot(np.angle(XOrig/YOrig)*180./np.pi,'or',label='Original')
tb.open("%s.REFANT_%s"%(XY0,REFANT))
XOrig = tb.getcell("CPARAM",Idx)[0,:]
YOrig = tb.getcell("CPARAM",Idx)[1,:]
tb.close()
plsub.plot(np.angle(XOrig/YOrig)*180./np.pi,'ob',label='Re-Referenced')
pl.legend(loc=0,numpoints=1)
plsub.set_ylim((-250,250))
pl.savefig('%s_RE-REF_XYPHASES.png'%XY0)
# Auxiliary function: unwrap phases for time interpolation
def unwrap(phases, check=False):
dims = np.shape(phases)
if dims[1]==0: # Bandpass type
for i in range(len(phases)-1):
if phases[i+1]-phases[i] > np.pi:
phases[i+1,:] -= 2.*np.pi
elif phases[i+1]-phases[i] < -np.pi:
phases[i+1,:] += 2.*np.pi
if check:
pl.figure()
pl.plot(180./np.pi*phases)
elif dims[0]>1: # Bandpass-gain type
for j in range(dims[1]):
for i in range(dims[0]-1):
if phases[i+1,j]-phases[i,j] > np.pi:
phases[i+1:,j] -= 2.*np.pi
printMsg('Adding phase wrap to gain at channel %i'%i)
elif phases[i+1,j]-phases[i,j] < -np.pi:
phases[i+1:,j] += 2.*np.pi
printMsg('Removing phase wrap to gain at channel %i'%i)
if check:
pl.figure()
pl.plot(180./np.pi*phases[:,0])
# Auxiliary function: prepare the CALAPPPHASE, from a set of MSs:
def makeCalAPP(mslist):
printMsg('Will create CALAPPPHASE table from measurement sets.')
os.system('rm -rf ./CALAPPPHASE.tab')
for i,asd in enumerate(mslist):
printMsg('Working out MS #%i - %s'%(i+1,asd))
if i==0:
os.system('cp -rf %s/ASDM_CALAPPPHASE ./CALAPPPHASE.tab'%asd)
else:
tb.open(os.path.join(asd,'ASDM_CALAPPPHASE'))
tb.copyrows('./CALAPPPHASE.tab')
tb.close()
tb.open(os.path.join(asd,'ASDM_CALAPPPHASE'))
time0 = tb.getcol('startValidTime')
time1 = tb.getcol('endValidTime')
tb.close()
tb.open(asd)
mstime = tb.getcol('TIME')
tb.close()
if len(time0)==0:
printMsg('WARNING! NO APPCAL DATA FOR %s\n'%asd)
else:
print('\n\nMEAS SET %s:'%asd)
tmin = np.min(time0)/86400.
tmax = np.max(time1)/86400.
mstmin = np.min(mstime)/86400.
mstmax = np.max(mstime)/86400.
printMsg('MS TIME RUNS FROM %8.5f TO %8.5f DAYS'%(mstmin,mstmax))
if len(time0)>0:
printMsg('FOR APP TABLE, TIME RUNS FROM %8.5f TO %8.5f DAYS'%(tmin,tmax))
return timeranges
tic = time.time()
#########################################
# DO SOME SANITY CHECKS OF PARAMETERS
try:
doSolve = float(doSolve)
except:
printError("ERROR! doSolve should be a float!")
nALMA = len(linAntIdx)
if not os.path.exists(IDI):
raise Exception("ERROR! IDI file (or SWIN folder) does not exist!")
if type(calAPP) is list:
try:
makeCalAPP(calAPP)
calAPP = './CALAPPPHASE.tab'
except:
printError('ERROR: Could not create nor interprete the CALAPPPHASE table!')
c0 = len(calAPP) == 0 ; c1 = len(ALMAant) == 0
if c0 != c1:
printError("ERROR! either both or none of calAPP and ALMAant need to be set!")
if c0:
printMsg("WARNING: calAPP and ALMAant are not set.")
printMsg("ALMA CAL TABLES DO NOT SEEM TO BE USED, ACCORDING TO USER.")
printMsg("This is not a problem in some cases...(isPhased now False).")
isPhased=False
else:
if not os.path.exists(calAPP) or not os.path.exists(ALMAant):
printError("ERROR! calAPP and/or ALMAant WERE NOT FOUND!")
else:
isPhased = True
try:
spw = int(spw)
except:
printError("ERROR! spw should be an integer!")
if len(gains)!= nALMA or len(dterms)!= nALMA:
printError("Invalid format for gains and/or dterms!\n Should be lists as large as the number of linear-polarization VLBI stations!")
# Sanity check for interpolation:
if type(interpolation) is not list:
printError("Interpolation must be a list (or a list of lists)!")
if len(interpolation)==0:
interpolation = [[] for i in range(nALMA)]
if len(interpolation)!= nALMA:
printError("Wrong length for interpolation!")
for i,intype in enumerate(interpolation):
if type(intype) is not list:
printError("Interpolation must be a list (or a list of of lists)!")
if len(intype)==0:
interpolation[i] = ['linear' for g in gains[i]]
intype = interpolation[i]
if len(intype) != len(gains[i]):
printError("Interpolation must have the same dimensions as gains!")
for ints in intype:
if ints not in ['linear','nearest']:
printMsg("integration type " + ints + " requested.")
printError("Only \'linear\' and \'nearest\' interpolations are supported!")
try:
XYavgTime = float(XYavgTime)
except:
printError("XYavgTime must be a positive (or zero) double!")
if XYavgTime < 0.0:
printError("XYavgTime must be positive or zero!")
if type(gainmode) is not list:
printError("gainmode must be a list (or a list of lists)!")
if len(gainmode)==0:
gainmode = [[] for i in range(nALMA)]
if len(gainmode)!= nALMA:
printError("Wrong length for gainmode!")
for i,gtype in enumerate(gainmode):
if type(gtype) is not list:
printError("gainmode must be a list (or a list of of lists)!")
if len(gtype)==0:
gainmode[i] = [{True:'G',False:'T'}['XY0' in g or 'bandpass' in g or 'Gxyamp' in g] for g in gains[i]]
gtype = gainmode[i]
if len(gtype) != len(gains[i]):
printError("gainmode must have the same dimensions as gains!")
for ints in gtype:
if ints not in ['G','T','S']:
printMsg("Gain type " + ints + " requested.")
printError("Only \'G\', \'S\' and \'T\' interpolations are supported!")
for gi in range(len(gains)):
for gii in range(len(gains[gi])):
printMsg('Will calibrate with table %s in %s mode.'%(os.path.basename(gains[gi][gii]),gainmode[gi][gii]))
# Sanity check for gains and dterms:
for g in gains:
if type(g) is not list:
printError("Invalid format for gains!\n Each element should be a list with the names of the gain tables for the ith linear-pol. VLBI station")
else:
for elem in g:
if type(elem) is not str:
printError("Invalid format for gains!\n Each element (of each element) should be a string (the name of a calibration table)")
for elem in dterms:
if type(elem) is not str:
printError("Invalid format for dterms!\n Each element should be a string (the name of a calibration table)")
if len(calAPPTime) != 2:
printError("Bad format for calAPPTime. Should be a list of 2 floats!")
try:
CALAPPTSHIFT, CALAPPDT = [float(cc) for cc in calAPPTime]
except:
printError("Bad format for calAPPTime. Should be a list of 2 floats!")
#########################################
######################
# READ IDs OF ALMA ANTENNAS USED IN THE PHASING:
if isPhased:
success = tb.open(calAPP)
if not success:
printError('ERROR: INVALID calAPP TABLE!')
try:
time0 = tb.getcol('startValidTime')-CALAPPDT+CALAPPTSHIFT
time1 = tb.getcol('endValidTime')+CALAPPDT+CALAPPTSHIFT
#########
# Figure out times with unphased data:
ADJ = tb.getcol('adjustToken')
BBN = tb.getcol('basebandName')
BBC = ['BB_%i'%i for i in range(1,5)]
sc2flag = [[] for i in range(4)] # Currently, we assume 1 spw per BBC in the APP mode.
scgood = [[] for i in range(4)] # Currently, we assume 1 spw per BBC in the APP mode.
timeranges = [[] for i in range(4)] # Currently, we assume 1 spw per BBC in the APP mode.
for j in range(4):
sc2flag[j] = [i for i in range(len(ADJ)) if BBN[i]==BBC[j] and ('PHASE_UPDATED' not in ADJ[i]) and ('PHASE_NOCHANGE' not in ADJ[i])]
scgood[j] = [i for i in range(len(ADJ)) if BBN[i]==BBC[j] and ('PHASE_UPDATED' in ADJ[i] or 'PHASE_NOCHANGE' in ADJ[i])]
SUBSCANDUR = time1[sc2flag[0][0]] - time0[sc2flag[0][0]]
sec = 1.
for j in range(4):
if len(sc2flag[j])>0:
for si in sc2flag[j]:
timerange = [time1[si]-SUBSCANDUR-sec, time1[si]+sec]
if timerange not in timeranges[j]:
timeranges[j].append(timerange)
for si in scgood[j]:
timerange = [time1[si]-SUBSCANDUR-sec,time0[si]+sec]
if si-1 in sc2flag[j]:
if timerange not in timeranges[j]:
timeranges[j].append(timerange)
# For testing:
timerangesArr = [np.array(ti) for ti in timeranges]
#########
nphant = tb.getcol('numPhasedAntennas')
refs = tb.getcol('refAntennaIndex')
asdmtimes = [time0,time1]
phants = []
for i in range(len(nphant)):
phants.append(list(tb.getcell('phasedAntennas', rownr = i)))
tb.close()
except:
printError('ERROR: INVALID calAPP TABLE CONTENT!')
success = tb.open(ALMAant)
if not success:
printError('ERROR: NO VALID ANTENNA TABLE FOUND!')
allants = list(tb.getcol('NAME'))
allantidx = list(range(len(allants)))
tb.close()
refants = np.array([allants.index(phants[t][refs[t]]) for t in range(len(phants))])
antimes = [[[0.,0.]] for ian in allants]
for ian,antenna in enumerate(allants):
for j,phan in enumerate(phants):
if antenna in phan:
antimes[ian].append([time0[j]-CALAPPDT+CALAPPTSHIFT,time1[j]+CALAPPDT+CALAPPTSHIFT])
auxarr = np.zeros((len(antimes[ian]),2))
auxarr[:] = antimes[ian]
antimes[ian] = auxarr
nphtimes = [len(anti) for anti in antimes]
else:
# Not a phased array. Dummy values for phasing info:
allants = [1]
allantidx = [0]
antimes = [np.array([0.,1.e20])]
nphtimes = [1]
refants = np.array([0],dtype=np.int)
asdmtimes = [np.array([0.]),np.array([1.e20])]
timerangesArr = [np.array([0.,0.]) for i in range(4)]
######################
#######
# CHECK IF THIS IS A FITS-IDI FILE OR A SWIN DIR.:
if os.path.isdir(IDI):
isSWIN = True
try:
printMsg('Opening "%s"' % (DiFXcalc))
antcodes = [];
calc = open(DiFXcalc)
lines = calc.readlines()
calc.close()
for ii, line in enumerate(lines):
if 'TELESCOPE' in line and 'NAME' in line:
antcodes.append(line.split()[-1])
except:
raise Exception('ERROR! NO ANTENNAS FOUND IN CALC FILE!')
ifile = open(DiFXinput)
inputlines = ifile.readlines()
ifile.close()
FreqL = [inputlines.index(l) for l in inputlines if 'FREQ TABLE' in l]
# ONLY ONE FREQ TABLE IS ALLOWED:
try:
fr = FreqL[0]
Nfreq = int(list(filter(
lambda x: 'FREQ ENTRIES' in x, inputlines[fr+1:]))[0].split()[-1])
Nr = list(range(Nfreq))
except Exception as ex:
printMsg(str(ex))
printError("BAD input file!")
FrInfo = {'FREQ (MHZ)':[0. for i in Nr], 'BW (MHZ)':[0. for i in Nr],
'SIDEBAND':['U' for i in Nr], 'NUM CHANNELS':[1 for i in Nr],
'CHANS TO AVG':[1 for i in Nr], 'OVERSAMPLE FAC.':[1 for i in Nr],
'DECIMATION FAC.':[1 for i in Nr], 'SIGN' :[1. for i in Nr]}
# READ METADATA FOR ALL FREQUENCIES:
for entry in FrInfo.keys():
for line in inputlines[fr+1:]:
if entry in line:
index = int((line.split(':')[0]).split()[-1])
FrInfo[entry][index] = type(FrInfo[entry][0])(line.split()[-1])
# SORT OUT THE CHANNEL FREQUENCIES:
if len(doIF)==0:
doIF = list(range(1,len(Nr)+1))
metadata = []
IFchan = 0
for nu in Nr:
nu0 = FrInfo['FREQ (MHZ)'][nu]
bw = FrInfo['BW (MHZ)'][nu]
nchan = FrInfo['NUM CHANNELS'][nu]
# MAX. NUMBER OF CHANNELS:
chav = FrInfo['CHANS TO AVG'][nu]
if nu in doIF:
IFchan = max([IFchan,int(nchan/chav)])
sb = {True: 1.0 , False: -1.0}[FrInfo['SIDEBAND'][nu] == 'U']
FrInfo['SIGN'][nu] = float(sb)
freqs = (nu0 + np.linspace((sb-1.)/2.,(sb+1.)/2.,nchan//chav,endpoint=False)*bw)*1.e6
if float(nchan//chav) != nchan/chav:
printMsg("linspace check chan: %d / %d = %f" %
(nchan, chav, nchan/chav))
freqs = (nu0 + np.linspace((sb-1.)/2.,(sb+1.)/2.,
nchan//chav, # should be exactly divisible
endpoint=False)*bw)*1.e6
metadata.append(freqs)
elif os.path.isfile(IDI):
isSWIN = False
try:
import pyfits as pf
ffile = pf.open(IDI)
antcodes = [ff[:2] for ff in ffile['ANTENNA'].data['ANNAME']]
except:
raise Exception('ERROR! NO ANTENNAS FOUND IN FITS FILE!')
# READ FREQUENCY INFO TO HELP SELECTING THE SPW AUTOMATICALLY:
fitsf = pf.open(IDI)
nu0 = fitsf['FREQUENCY'].header['REF_FREQ']
bw = fitsf['FREQUENCY'].header['CHAN_BW']
nch = fitsf['FREQUENCY'].header['NO_CHAN'] #*fitsf['FREQUENCY'].header['NO_BAND']
IFchan = nch
Nr = fitsf['FREQUENCY'].header['NO_BAND']