| 1 | from asap.scantable import scantable
|
|---|
| 2 | from asap.parameters import rcParams
|
|---|
| 3 | from asap.logging import asaplog, asaplog_post_dec
|
|---|
| 4 | from asap.selector import selector
|
|---|
| 5 | from asap import asaplotgui
|
|---|
| 6 |
|
|---|
| 7 | @asaplog_post_dec
|
|---|
| 8 | def average_time(*args, **kwargs):
|
|---|
| 9 | """
|
|---|
| 10 | Return the (time) average of a scan or list of scans. [in channels only]
|
|---|
| 11 | The cursor of the output scan is set to 0
|
|---|
| 12 | Parameters:
|
|---|
| 13 | one scan or comma separated scans or a list of scans
|
|---|
| 14 | mask: an optional mask (only used for 'var' and 'tsys' weighting)
|
|---|
| 15 | scanav: True averages each scan separately.
|
|---|
| 16 | False (default) averages all scans together,
|
|---|
| 17 | weight: Weighting scheme.
|
|---|
| 18 | 'none' (mean no weight)
|
|---|
| 19 | 'var' (1/var(spec) weighted)
|
|---|
| 20 | 'tsys' (1/Tsys**2 weighted)
|
|---|
| 21 | 'tint' (integration time weighted)
|
|---|
| 22 | 'tintsys' (Tint/Tsys**2)
|
|---|
| 23 | 'median' ( median averaging)
|
|---|
| 24 | align: align the spectra in velocity before averaging. It takes
|
|---|
| 25 | the time of the first spectrum in the first scantable
|
|---|
| 26 | as reference time.
|
|---|
| 27 | Example:
|
|---|
| 28 | # return a time averaged scan from scana and scanb
|
|---|
| 29 | # without using a mask
|
|---|
| 30 | scanav = average_time(scana,scanb)
|
|---|
| 31 | # or equivalent
|
|---|
| 32 | # scanav = average_time([scana, scanb])
|
|---|
| 33 | # return the (time) averaged scan, i.e. the average of
|
|---|
| 34 | # all correlator cycles
|
|---|
| 35 | scanav = average_time(scan, scanav=True)
|
|---|
| 36 | """
|
|---|
| 37 | scanav = False
|
|---|
| 38 | if kwargs.has_key('scanav'):
|
|---|
| 39 | scanav = kwargs.get('scanav')
|
|---|
| 40 | weight = 'tint'
|
|---|
| 41 | if kwargs.has_key('weight'):
|
|---|
| 42 | weight = kwargs.get('weight')
|
|---|
| 43 | mask = ()
|
|---|
| 44 | if kwargs.has_key('mask'):
|
|---|
| 45 | mask = kwargs.get('mask')
|
|---|
| 46 | align = False
|
|---|
| 47 | if kwargs.has_key('align'):
|
|---|
| 48 | align = kwargs.get('align')
|
|---|
| 49 | compel = False
|
|---|
| 50 | if kwargs.has_key('compel'):
|
|---|
| 51 | compel = kwargs.get('compel')
|
|---|
| 52 | varlist = vars()
|
|---|
| 53 | if isinstance(args[0],list):
|
|---|
| 54 | lst = args[0]
|
|---|
| 55 | elif isinstance(args[0],tuple):
|
|---|
| 56 | lst = list(args[0])
|
|---|
| 57 | else:
|
|---|
| 58 | lst = list(args)
|
|---|
| 59 |
|
|---|
| 60 | del varlist["kwargs"]
|
|---|
| 61 | varlist["args"] = "%d scantables" % len(lst)
|
|---|
| 62 | # need special formatting here for history...
|
|---|
| 63 |
|
|---|
| 64 | from asap._asap import stmath
|
|---|
| 65 | stm = stmath()
|
|---|
| 66 | for s in lst:
|
|---|
| 67 | if not isinstance(s,scantable):
|
|---|
| 68 | msg = "Please give a list of scantables"
|
|---|
| 69 | raise TypeError(msg)
|
|---|
| 70 | if scanav: scanav = "SCAN"
|
|---|
| 71 | else: scanav = "NONE"
|
|---|
| 72 | alignedlst = []
|
|---|
| 73 | if align:
|
|---|
| 74 | refepoch = lst[0].get_time(0)
|
|---|
| 75 | for scan in lst:
|
|---|
| 76 | alignedlst.append(scan.freq_align(refepoch,insitu=False))
|
|---|
| 77 | else:
|
|---|
| 78 | alignedlst = lst
|
|---|
| 79 | if weight.upper() == 'MEDIAN':
|
|---|
| 80 | # median doesn't support list of scantables - merge first
|
|---|
| 81 | merged = None
|
|---|
| 82 | if len(alignedlst) > 1:
|
|---|
| 83 | merged = merge(alignedlst)
|
|---|
| 84 | else:
|
|---|
| 85 | merged = alignedlst[0]
|
|---|
| 86 | s = scantable(stm._averagechannel(merged, 'MEDIAN', scanav))
|
|---|
| 87 | del merged
|
|---|
| 88 | else:
|
|---|
| 89 | #s = scantable(stm._average(alignedlst, mask, weight.upper(), scanav))
|
|---|
| 90 | s = scantable(stm._new_average(alignedlst, compel, mask, weight.upper(), scanav))
|
|---|
| 91 | s._add_history("average_time",varlist)
|
|---|
| 92 |
|
|---|
| 93 | return s
|
|---|
| 94 |
|
|---|
| 95 | @asaplog_post_dec
|
|---|
| 96 | def quotient(source, reference, preserve=True):
|
|---|
| 97 | """
|
|---|
| 98 | Return the quotient of a 'source' (signal) scan and a 'reference' scan.
|
|---|
| 99 | The reference can have just one scan, even if the signal has many. Otherwise
|
|---|
| 100 | they must have the same number of scans.
|
|---|
| 101 | The cursor of the output scan is set to 0
|
|---|
| 102 | Parameters:
|
|---|
| 103 | source: the 'on' scan
|
|---|
| 104 | reference: the 'off' scan
|
|---|
| 105 | preserve: you can preserve (default) the continuum or
|
|---|
| 106 | remove it. The equations used are
|
|---|
| 107 | preserve: Output = Toff * (on/off) - Toff
|
|---|
| 108 | remove: Output = Toff * (on/off) - Ton
|
|---|
| 109 | """
|
|---|
| 110 | varlist = vars()
|
|---|
| 111 | from asap._asap import stmath
|
|---|
| 112 | stm = stmath()
|
|---|
| 113 | stm._setinsitu(False)
|
|---|
| 114 | s = scantable(stm._quotient(source, reference, preserve))
|
|---|
| 115 | s._add_history("quotient",varlist)
|
|---|
| 116 | return s
|
|---|
| 117 |
|
|---|
| 118 | @asaplog_post_dec
|
|---|
| 119 | def dototalpower(calon, caloff, tcalval=0.0):
|
|---|
| 120 | """
|
|---|
| 121 | Do calibration for CAL on,off signals.
|
|---|
| 122 | Adopted from GBTIDL dototalpower
|
|---|
| 123 | Parameters:
|
|---|
| 124 | calon: the 'cal on' subintegration
|
|---|
| 125 | caloff: the 'cal off' subintegration
|
|---|
| 126 | tcalval: user supplied Tcal value
|
|---|
| 127 | """
|
|---|
| 128 | varlist = vars()
|
|---|
| 129 | from asap._asap import stmath
|
|---|
| 130 | stm = stmath()
|
|---|
| 131 | stm._setinsitu(False)
|
|---|
| 132 | s = scantable(stm._dototalpower(calon, caloff, tcalval))
|
|---|
| 133 | s._add_history("dototalpower",varlist)
|
|---|
| 134 | return s
|
|---|
| 135 |
|
|---|
| 136 | @asaplog_post_dec
|
|---|
| 137 | def dosigref(sig, ref, smooth, tsysval=0.0, tauval=0.0):
|
|---|
| 138 | """
|
|---|
| 139 | Calculate a quotient (sig-ref/ref * Tsys)
|
|---|
| 140 | Adopted from GBTIDL dosigref
|
|---|
| 141 | Parameters:
|
|---|
| 142 | sig: on source data
|
|---|
| 143 | ref: reference data
|
|---|
| 144 | smooth: width of box car smoothing for reference
|
|---|
| 145 | tsysval: user specified Tsys (scalar only)
|
|---|
| 146 | tauval: user specified Tau (required if tsysval is set)
|
|---|
| 147 | """
|
|---|
| 148 | varlist = vars()
|
|---|
| 149 | from asap._asap import stmath
|
|---|
| 150 | stm = stmath()
|
|---|
| 151 | stm._setinsitu(False)
|
|---|
| 152 | s = scantable(stm._dosigref(sig, ref, smooth, tsysval, tauval))
|
|---|
| 153 | s._add_history("dosigref",varlist)
|
|---|
| 154 | return s
|
|---|
| 155 |
|
|---|
| 156 | @asaplog_post_dec
|
|---|
| 157 | def calps(scantab, scannos, smooth=1, tsysval=0.0, tauval=0.0, tcalval=0.0, verify=False):
|
|---|
| 158 | """
|
|---|
| 159 | Calibrate GBT position switched data
|
|---|
| 160 | Adopted from GBTIDL getps
|
|---|
| 161 | Currently calps identify the scans as position switched data if they
|
|---|
| 162 | contain '_ps' in the source name. The data must contains 'CAL' signal
|
|---|
| 163 | on/off in each integration. To identify 'CAL' on state, the word, 'calon'
|
|---|
| 164 | need to be present in the source name field.
|
|---|
| 165 | (GBT MS data reading process to scantable automatically append these
|
|---|
| 166 | id names to the source names)
|
|---|
| 167 |
|
|---|
| 168 | Parameters:
|
|---|
| 169 | scantab: scantable
|
|---|
| 170 | scannos: list of scan numbers
|
|---|
| 171 | smooth: optional box smoothing order for the reference
|
|---|
| 172 | (default is 1 = no smoothing)
|
|---|
| 173 | tsysval: optional user specified Tsys (default is 0.0,
|
|---|
| 174 | use Tsys in the data)
|
|---|
| 175 | tauval: optional user specified Tau
|
|---|
| 176 | tcalval: optional user specified Tcal (default is 0.0,
|
|---|
| 177 | use Tcal value in the data)
|
|---|
| 178 | """
|
|---|
| 179 | varlist = vars()
|
|---|
| 180 | # check for the appropriate data
|
|---|
| 181 | ## s = scantab.get_scan('*_ps*')
|
|---|
| 182 | ## if s is None:
|
|---|
| 183 | ## msg = "The input data appear to contain no position-switch mode data."
|
|---|
| 184 | ## raise TypeError(msg)
|
|---|
| 185 | s = scantab.copy()
|
|---|
| 186 | from asap._asap import srctype
|
|---|
| 187 | sel = selector()
|
|---|
| 188 | sel.set_types( srctype.pson )
|
|---|
| 189 | try:
|
|---|
| 190 | scantab.set_selection( sel )
|
|---|
| 191 | except Exception, e:
|
|---|
| 192 | msg = "The input data appear to contain no position-switch mode data."
|
|---|
| 193 | raise TypeError(msg)
|
|---|
| 194 | s.set_selection()
|
|---|
| 195 | sel.reset()
|
|---|
| 196 | ssub = s.get_scan(scannos)
|
|---|
| 197 | if ssub is None:
|
|---|
| 198 | msg = "No data was found with given scan numbers!"
|
|---|
| 199 | raise TypeError(msg)
|
|---|
| 200 | #ssubon = ssub.get_scan('*calon')
|
|---|
| 201 | #ssuboff = ssub.get_scan('*[^calon]')
|
|---|
| 202 | sel.set_types( [srctype.poncal,srctype.poffcal] )
|
|---|
| 203 | ssub.set_selection( sel )
|
|---|
| 204 | ssubon = ssub.copy()
|
|---|
| 205 | ssub.set_selection()
|
|---|
| 206 | sel.reset()
|
|---|
| 207 | sel.set_types( [srctype.pson,srctype.psoff] )
|
|---|
| 208 | ssub.set_selection( sel )
|
|---|
| 209 | ssuboff = ssub.copy()
|
|---|
| 210 | ssub.set_selection()
|
|---|
| 211 | sel.reset()
|
|---|
| 212 | if ssubon.nrow() != ssuboff.nrow():
|
|---|
| 213 | msg = "mismatch in numbers of CAL on/off scans. Cannot calibrate. Check the scan numbers."
|
|---|
| 214 | raise TypeError(msg)
|
|---|
| 215 | cals = dototalpower(ssubon, ssuboff, tcalval)
|
|---|
| 216 | #sig = cals.get_scan('*ps')
|
|---|
| 217 | #ref = cals.get_scan('*psr')
|
|---|
| 218 | sel.set_types( srctype.pson )
|
|---|
| 219 | cals.set_selection( sel )
|
|---|
| 220 | sig = cals.copy()
|
|---|
| 221 | cals.set_selection()
|
|---|
| 222 | sel.reset()
|
|---|
| 223 | sel.set_types( srctype.psoff )
|
|---|
| 224 | cals.set_selection( sel )
|
|---|
| 225 | ref = cals.copy()
|
|---|
| 226 | cals.set_selection()
|
|---|
| 227 | sel.reset()
|
|---|
| 228 | if sig.nscan() != ref.nscan():
|
|---|
| 229 | msg = "mismatch in numbers of on/off scans. Cannot calibrate. Check the scan numbers."
|
|---|
| 230 | raise TypeError(msg)
|
|---|
| 231 |
|
|---|
| 232 | #for user supplied Tsys
|
|---|
| 233 | if tsysval>0.0:
|
|---|
| 234 | if tauval<=0.0:
|
|---|
| 235 | msg = "Need to supply a valid tau to use the supplied Tsys"
|
|---|
| 236 | raise TypeError(msg)
|
|---|
| 237 | else:
|
|---|
| 238 | sig.recalc_azel()
|
|---|
| 239 | ref.recalc_azel()
|
|---|
| 240 | #msg = "Use of user specified Tsys is not fully implemented yet."
|
|---|
| 241 | #raise TypeError(msg)
|
|---|
| 242 | # use get_elevation to get elevation and
|
|---|
| 243 | # calculate a scaling factor using the formula
|
|---|
| 244 | # -> tsys use to dosigref
|
|---|
| 245 |
|
|---|
| 246 | #ress = dosigref(sig, ref, smooth, tsysval)
|
|---|
| 247 | ress = dosigref(sig, ref, smooth, tsysval, tauval)
|
|---|
| 248 | ###
|
|---|
| 249 | if verify:
|
|---|
| 250 | # get data
|
|---|
| 251 | import numpy
|
|---|
| 252 | precal={}
|
|---|
| 253 | postcal=[]
|
|---|
| 254 | keys=['ps','ps_calon','psr','psr_calon']
|
|---|
| 255 | types=[srctype.pson,srctype.poncal,srctype.psoff,srctype.poffcal]
|
|---|
| 256 | ifnos=list(ssub.getifnos())
|
|---|
| 257 | polnos=list(ssub.getpolnos())
|
|---|
| 258 | sel=selector()
|
|---|
| 259 | for i in range(2):
|
|---|
| 260 | #ss=ssuboff.get_scan('*'+keys[2*i])
|
|---|
| 261 | ll=[]
|
|---|
| 262 | for j in range(len(ifnos)):
|
|---|
| 263 | for k in range(len(polnos)):
|
|---|
| 264 | sel.set_ifs(ifnos[j])
|
|---|
| 265 | sel.set_polarizations(polnos[k])
|
|---|
| 266 | sel.set_types(types[2*i])
|
|---|
| 267 | try:
|
|---|
| 268 | #ss.set_selection(sel)
|
|---|
| 269 | ssuboff.set_selection(sel)
|
|---|
| 270 | except:
|
|---|
| 271 | continue
|
|---|
| 272 | #ll.append(numpy.array(ss._getspectrum(0)))
|
|---|
| 273 | ll.append(numpy.array(ssuboff._getspectrum(0)))
|
|---|
| 274 | sel.reset()
|
|---|
| 275 | ssuboff.set_selection()
|
|---|
| 276 | precal[keys[2*i]]=ll
|
|---|
| 277 | #del ss
|
|---|
| 278 | #ss=ssubon.get_scan('*'+keys[2*i+1])
|
|---|
| 279 | ll=[]
|
|---|
| 280 | for j in range(len(ifnos)):
|
|---|
| 281 | for k in range(len(polnos)):
|
|---|
| 282 | sel.set_ifs(ifnos[j])
|
|---|
| 283 | sel.set_polarizations(polnos[k])
|
|---|
| 284 | sel.set_types(types[2*i+1])
|
|---|
| 285 | try:
|
|---|
| 286 | #ss.set_selection(sel)
|
|---|
| 287 | ssubon.set_selection(sel)
|
|---|
| 288 | except:
|
|---|
| 289 | continue
|
|---|
| 290 | #ll.append(numpy.array(ss._getspectrum(0)))
|
|---|
| 291 | ll.append(numpy.array(ssubon._getspectrum(0)))
|
|---|
| 292 | sel.reset()
|
|---|
| 293 | ssubon.set_selection()
|
|---|
| 294 | precal[keys[2*i+1]]=ll
|
|---|
| 295 | #del ss
|
|---|
| 296 | for j in range(len(ifnos)):
|
|---|
| 297 | for k in range(len(polnos)):
|
|---|
| 298 | sel.set_ifs(ifnos[j])
|
|---|
| 299 | sel.set_polarizations(polnos[k])
|
|---|
| 300 | try:
|
|---|
| 301 | ress.set_selection(sel)
|
|---|
| 302 | except:
|
|---|
| 303 | continue
|
|---|
| 304 | postcal.append(numpy.array(ress._getspectrum(0)))
|
|---|
| 305 | sel.reset()
|
|---|
| 306 | ress.set_selection()
|
|---|
| 307 | del sel
|
|---|
| 308 | # plot
|
|---|
| 309 | asaplog.post()
|
|---|
| 310 | asaplog.push('Plot only first spectrum for each [if,pol] pairs to verify calibration.')
|
|---|
| 311 | asaplog.post('WARN')
|
|---|
| 312 | p=asaplotgui.asaplotgui()
|
|---|
| 313 | #nr=min(6,len(ifnos)*len(polnos))
|
|---|
| 314 | nr=len(ifnos)*len(polnos)
|
|---|
| 315 | titles=[]
|
|---|
| 316 | btics=[]
|
|---|
| 317 | if nr<4:
|
|---|
| 318 | p.set_panels(rows=nr,cols=2,nplots=2*nr,ganged=False)
|
|---|
| 319 | for i in range(2*nr):
|
|---|
| 320 | b=False
|
|---|
| 321 | if i >= 2*nr-2:
|
|---|
| 322 | b=True
|
|---|
| 323 | btics.append(b)
|
|---|
| 324 | elif nr==4:
|
|---|
| 325 | p.set_panels(rows=2,cols=4,nplots=8,ganged=False)
|
|---|
| 326 | for i in range(2*nr):
|
|---|
| 327 | b=False
|
|---|
| 328 | if i >= 2*nr-4:
|
|---|
| 329 | b=True
|
|---|
| 330 | btics.append(b)
|
|---|
| 331 | elif nr<7:
|
|---|
| 332 | p.set_panels(rows=3,cols=4,nplots=2*nr,ganged=False)
|
|---|
| 333 | for i in range(2*nr):
|
|---|
| 334 | if i >= 2*nr-4:
|
|---|
| 335 | b=True
|
|---|
| 336 | btics.append(b)
|
|---|
| 337 | else:
|
|---|
| 338 | asaplog.post()
|
|---|
| 339 | asaplog.push('Only first 6 [if,pol] pairs are plotted.')
|
|---|
| 340 | asaplog.post('WARN')
|
|---|
| 341 | nr=6
|
|---|
| 342 | for i in range(2*nr):
|
|---|
| 343 | b=False
|
|---|
| 344 | if i >= 2*nr-4:
|
|---|
| 345 | b=True
|
|---|
| 346 | btics.append(b)
|
|---|
| 347 | p.set_panels(rows=3,cols=4,nplots=2*nr,ganged=False)
|
|---|
| 348 | for i in range(nr):
|
|---|
| 349 | p.subplot(2*i)
|
|---|
| 350 | p.color=0
|
|---|
| 351 | title='raw data IF%s POL%s' % (ifnos[int(i/len(polnos))],polnos[i%len(polnos)])
|
|---|
| 352 | titles.append(title)
|
|---|
| 353 | #p.set_axes('title',title,fontsize=40)
|
|---|
| 354 | ymin=1.0e100
|
|---|
| 355 | ymax=-1.0e100
|
|---|
| 356 | nchan=s.nchan()
|
|---|
| 357 | edge=int(nchan*0.01)
|
|---|
| 358 | for j in range(4):
|
|---|
| 359 | spmin=min(precal[keys[j]][i][edge:nchan-edge])
|
|---|
| 360 | spmax=max(precal[keys[j]][i][edge:nchan-edge])
|
|---|
| 361 | ymin=min(ymin,spmin)
|
|---|
| 362 | ymax=max(ymax,spmax)
|
|---|
| 363 | for j in range(4):
|
|---|
| 364 | if i==0:
|
|---|
| 365 | p.set_line(label=keys[j])
|
|---|
| 366 | else:
|
|---|
| 367 | p.legend()
|
|---|
| 368 | p.plot(precal[keys[j]][i])
|
|---|
| 369 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 370 | if not btics[2*i]:
|
|---|
| 371 | p.axes.set_xticks([])
|
|---|
| 372 | p.subplot(2*i+1)
|
|---|
| 373 | p.color=0
|
|---|
| 374 | title='cal data IF%s POL%s' % (ifnos[int(i/len(polnos))],polnos[i%len(polnos)])
|
|---|
| 375 | titles.append(title)
|
|---|
| 376 | #p.set_axes('title',title)
|
|---|
| 377 | p.legend()
|
|---|
| 378 | ymin=postcal[i][edge:nchan-edge].min()
|
|---|
| 379 | ymax=postcal[i][edge:nchan-edge].max()
|
|---|
| 380 | p.plot(postcal[i])
|
|---|
| 381 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 382 | if not btics[2*i+1]:
|
|---|
| 383 | p.axes.set_xticks([])
|
|---|
| 384 | for i in range(2*nr):
|
|---|
| 385 | p.subplot(i)
|
|---|
| 386 | p.set_axes('title',titles[i],fontsize='medium')
|
|---|
| 387 | x=raw_input('Accept calibration ([y]/n): ' )
|
|---|
| 388 | if x.upper() == 'N':
|
|---|
| 389 | p.unmap()
|
|---|
| 390 | del p
|
|---|
| 391 | return scabtab
|
|---|
| 392 | p.unmap()
|
|---|
| 393 | del p
|
|---|
| 394 | ###
|
|---|
| 395 | ress._add_history("calps", varlist)
|
|---|
| 396 | return ress
|
|---|
| 397 |
|
|---|
| 398 | @asaplog_post_dec
|
|---|
| 399 | def calnod(scantab, scannos=[], smooth=1, tsysval=0.0, tauval=0.0, tcalval=0.0, verify=False):
|
|---|
| 400 | """
|
|---|
| 401 | Do full (but a pair of scans at time) processing of GBT Nod data
|
|---|
| 402 | calibration.
|
|---|
| 403 | Adopted from GBTIDL's getnod
|
|---|
| 404 | Parameters:
|
|---|
| 405 | scantab: scantable
|
|---|
| 406 | scannos: a pair of scan numbers, or the first scan number of the pair
|
|---|
| 407 | smooth: box car smoothing order
|
|---|
| 408 | tsysval: optional user specified Tsys value
|
|---|
| 409 | tauval: optional user specified tau value (not implemented yet)
|
|---|
| 410 | tcalval: optional user specified Tcal value
|
|---|
| 411 | """
|
|---|
| 412 | varlist = vars()
|
|---|
| 413 | from asap._asap import stmath
|
|---|
| 414 | from asap._asap import srctype
|
|---|
| 415 | stm = stmath()
|
|---|
| 416 | stm._setinsitu(False)
|
|---|
| 417 |
|
|---|
| 418 | # check for the appropriate data
|
|---|
| 419 | ## s = scantab.get_scan('*_nod*')
|
|---|
| 420 | ## if s is None:
|
|---|
| 421 | ## msg = "The input data appear to contain no Nod observing mode data."
|
|---|
| 422 | ## raise TypeError(msg)
|
|---|
| 423 | s = scantab.copy()
|
|---|
| 424 | sel = selector()
|
|---|
| 425 | sel.set_types( srctype.nod )
|
|---|
| 426 | try:
|
|---|
| 427 | s.set_selection( sel )
|
|---|
| 428 | except Exception, e:
|
|---|
| 429 | msg = "The input data appear to contain no Nod observing mode data."
|
|---|
| 430 | raise TypeError(msg)
|
|---|
| 431 | sel.reset()
|
|---|
| 432 | del sel
|
|---|
| 433 | del s
|
|---|
| 434 |
|
|---|
| 435 | # need check correspondance of each beam with sig-ref ...
|
|---|
| 436 | # check for timestamps, scan numbers, subscan id (not available in
|
|---|
| 437 | # ASAP data format...). Assume 1st scan of the pair (beam 0 - sig
|
|---|
| 438 | # and beam 1 - ref...)
|
|---|
| 439 | # First scan number of paired scans or list of pairs of
|
|---|
| 440 | # scan numbers (has to have even number of pairs.)
|
|---|
| 441 |
|
|---|
| 442 | #data splitting
|
|---|
| 443 | scan1no = scan2no = 0
|
|---|
| 444 |
|
|---|
| 445 | if len(scannos)==1:
|
|---|
| 446 | scan1no = scannos[0]
|
|---|
| 447 | scan2no = scannos[0]+1
|
|---|
| 448 | pairScans = [scan1no, scan2no]
|
|---|
| 449 | else:
|
|---|
| 450 | #if len(scannos)>2:
|
|---|
| 451 | # msg = "calnod can only process a pair of nod scans at time."
|
|---|
| 452 | # raise TypeError(msg)
|
|---|
| 453 | #
|
|---|
| 454 | #if len(scannos)==2:
|
|---|
| 455 | # scan1no = scannos[0]
|
|---|
| 456 | # scan2no = scannos[1]
|
|---|
| 457 | pairScans = list(scannos)
|
|---|
| 458 |
|
|---|
| 459 | if tsysval>0.0:
|
|---|
| 460 | if tauval<=0.0:
|
|---|
| 461 | msg = "Need to supply a valid tau to use the supplied Tsys"
|
|---|
| 462 | raise TypeError(msg)
|
|---|
| 463 | else:
|
|---|
| 464 | scantab.recalc_azel()
|
|---|
| 465 | resspec = scantable(stm._donod(scantab, pairScans, smooth, tsysval,tauval,tcalval))
|
|---|
| 466 | ###
|
|---|
| 467 | if verify:
|
|---|
| 468 | # get data
|
|---|
| 469 | import numpy
|
|---|
| 470 | precal={}
|
|---|
| 471 | postcal=[]
|
|---|
| 472 | keys=['','_calon']
|
|---|
| 473 | types=[srctype.nod,srctype.nodcal]
|
|---|
| 474 | ifnos=list(scantab.getifnos())
|
|---|
| 475 | polnos=list(scantab.getpolnos())
|
|---|
| 476 | sel=selector()
|
|---|
| 477 | ss = scantab.copy()
|
|---|
| 478 | for i in range(2):
|
|---|
| 479 | #ss=scantab.get_scan('*'+keys[i])
|
|---|
| 480 | ll=[]
|
|---|
| 481 | ll2=[]
|
|---|
| 482 | for j in range(len(ifnos)):
|
|---|
| 483 | for k in range(len(polnos)):
|
|---|
| 484 | sel.set_ifs(ifnos[j])
|
|---|
| 485 | sel.set_polarizations(polnos[k])
|
|---|
| 486 | sel.set_scans(pairScans[0])
|
|---|
| 487 | sel.set_types(types[i])
|
|---|
| 488 | try:
|
|---|
| 489 | ss.set_selection(sel)
|
|---|
| 490 | except:
|
|---|
| 491 | continue
|
|---|
| 492 | ll.append(numpy.array(ss._getspectrum(0)))
|
|---|
| 493 | sel.reset()
|
|---|
| 494 | ss.set_selection()
|
|---|
| 495 | sel.set_ifs(ifnos[j])
|
|---|
| 496 | sel.set_polarizations(polnos[k])
|
|---|
| 497 | sel.set_scans(pairScans[1])
|
|---|
| 498 | sel.set_types(types[i])
|
|---|
| 499 | try:
|
|---|
| 500 | ss.set_selection(sel)
|
|---|
| 501 | except:
|
|---|
| 502 | ll.pop()
|
|---|
| 503 | continue
|
|---|
| 504 | ll2.append(numpy.array(ss._getspectrum(0)))
|
|---|
| 505 | sel.reset()
|
|---|
| 506 | ss.set_selection()
|
|---|
| 507 | key='%s%s' %(pairScans[0],keys[i])
|
|---|
| 508 | precal[key]=ll
|
|---|
| 509 | key='%s%s' %(pairScans[1],keys[i])
|
|---|
| 510 | precal[key]=ll2
|
|---|
| 511 | #del ss
|
|---|
| 512 | keys=precal.keys()
|
|---|
| 513 | for j in range(len(ifnos)):
|
|---|
| 514 | for k in range(len(polnos)):
|
|---|
| 515 | sel.set_ifs(ifnos[j])
|
|---|
| 516 | sel.set_polarizations(polnos[k])
|
|---|
| 517 | sel.set_scans(pairScans[0])
|
|---|
| 518 | try:
|
|---|
| 519 | resspec.set_selection(sel)
|
|---|
| 520 | except:
|
|---|
| 521 | continue
|
|---|
| 522 | postcal.append(numpy.array(resspec._getspectrum(0)))
|
|---|
| 523 | sel.reset()
|
|---|
| 524 | resspec.set_selection()
|
|---|
| 525 | del sel
|
|---|
| 526 | # plot
|
|---|
| 527 | asaplog.post()
|
|---|
| 528 | asaplog.push('Plot only first spectrum for each [if,pol] pairs to verify calibration.')
|
|---|
| 529 | asaplog.post('WARN')
|
|---|
| 530 | p=asaplotgui.asaplotgui()
|
|---|
| 531 | #nr=min(6,len(ifnos)*len(polnos))
|
|---|
| 532 | nr=len(ifnos)*len(polnos)
|
|---|
| 533 | titles=[]
|
|---|
| 534 | btics=[]
|
|---|
| 535 | if nr<4:
|
|---|
| 536 | p.set_panels(rows=nr,cols=2,nplots=2*nr,ganged=False)
|
|---|
| 537 | for i in range(2*nr):
|
|---|
| 538 | b=False
|
|---|
| 539 | if i >= 2*nr-2:
|
|---|
| 540 | b=True
|
|---|
| 541 | btics.append(b)
|
|---|
| 542 | elif nr==4:
|
|---|
| 543 | p.set_panels(rows=2,cols=4,nplots=8,ganged=False)
|
|---|
| 544 | for i in range(2*nr):
|
|---|
| 545 | b=False
|
|---|
| 546 | if i >= 2*nr-4:
|
|---|
| 547 | b=True
|
|---|
| 548 | btics.append(b)
|
|---|
| 549 | elif nr<7:
|
|---|
| 550 | p.set_panels(rows=3,cols=4,nplots=2*nr,ganged=False)
|
|---|
| 551 | for i in range(2*nr):
|
|---|
| 552 | if i >= 2*nr-4:
|
|---|
| 553 | b=True
|
|---|
| 554 | btics.append(b)
|
|---|
| 555 | else:
|
|---|
| 556 | asaplog.post()
|
|---|
| 557 | asaplog.push('Only first 6 [if,pol] pairs are plotted.')
|
|---|
| 558 | asaplog.post('WARN')
|
|---|
| 559 | nr=6
|
|---|
| 560 | for i in range(2*nr):
|
|---|
| 561 | b=False
|
|---|
| 562 | if i >= 2*nr-4:
|
|---|
| 563 | b=True
|
|---|
| 564 | btics.append(b)
|
|---|
| 565 | p.set_panels(rows=3,cols=4,nplots=2*nr,ganged=False)
|
|---|
| 566 | for i in range(nr):
|
|---|
| 567 | p.subplot(2*i)
|
|---|
| 568 | p.color=0
|
|---|
| 569 | title='raw data IF%s POL%s' % (ifnos[int(i/len(polnos))],polnos[i%len(polnos)])
|
|---|
| 570 | titles.append(title)
|
|---|
| 571 | #p.set_axes('title',title,fontsize=40)
|
|---|
| 572 | ymin=1.0e100
|
|---|
| 573 | ymax=-1.0e100
|
|---|
| 574 | nchan=scantab.nchan()
|
|---|
| 575 | edge=int(nchan*0.01)
|
|---|
| 576 | for j in range(4):
|
|---|
| 577 | spmin=min(precal[keys[j]][i][edge:nchan-edge])
|
|---|
| 578 | spmax=max(precal[keys[j]][i][edge:nchan-edge])
|
|---|
| 579 | ymin=min(ymin,spmin)
|
|---|
| 580 | ymax=max(ymax,spmax)
|
|---|
| 581 | for j in range(4):
|
|---|
| 582 | if i==0:
|
|---|
| 583 | p.set_line(label=keys[j])
|
|---|
| 584 | else:
|
|---|
| 585 | p.legend()
|
|---|
| 586 | p.plot(precal[keys[j]][i])
|
|---|
| 587 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 588 | if not btics[2*i]:
|
|---|
| 589 | p.axes.set_xticks([])
|
|---|
| 590 | p.subplot(2*i+1)
|
|---|
| 591 | p.color=0
|
|---|
| 592 | title='cal data IF%s POL%s' % (ifnos[int(i/len(polnos))],polnos[i%len(polnos)])
|
|---|
| 593 | titles.append(title)
|
|---|
| 594 | #p.set_axes('title',title)
|
|---|
| 595 | p.legend()
|
|---|
| 596 | ymin=postcal[i][edge:nchan-edge].min()
|
|---|
| 597 | ymax=postcal[i][edge:nchan-edge].max()
|
|---|
| 598 | p.plot(postcal[i])
|
|---|
| 599 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 600 | if not btics[2*i+1]:
|
|---|
| 601 | p.axes.set_xticks([])
|
|---|
| 602 | for i in range(2*nr):
|
|---|
| 603 | p.subplot(i)
|
|---|
| 604 | p.set_axes('title',titles[i],fontsize='medium')
|
|---|
| 605 | x=raw_input('Accept calibration ([y]/n): ' )
|
|---|
| 606 | if x.upper() == 'N':
|
|---|
| 607 | p.unmap()
|
|---|
| 608 | del p
|
|---|
| 609 | return scabtab
|
|---|
| 610 | p.unmap()
|
|---|
| 611 | del p
|
|---|
| 612 | ###
|
|---|
| 613 | resspec._add_history("calnod",varlist)
|
|---|
| 614 | return resspec
|
|---|
| 615 |
|
|---|
| 616 | @asaplog_post_dec
|
|---|
| 617 | def calfs(scantab, scannos=[], smooth=1, tsysval=0.0, tauval=0.0, tcalval=0.0, verify=False):
|
|---|
| 618 | """
|
|---|
| 619 | Calibrate GBT frequency switched data.
|
|---|
| 620 | Adopted from GBTIDL getfs.
|
|---|
| 621 | Currently calfs identify the scans as frequency switched data if they
|
|---|
| 622 | contain '_fs' in the source name. The data must contains 'CAL' signal
|
|---|
| 623 | on/off in each integration. To identify 'CAL' on state, the word, 'calon'
|
|---|
| 624 | need to be present in the source name field.
|
|---|
| 625 | (GBT MS data reading via scantable automatically append these
|
|---|
| 626 | id names to the source names)
|
|---|
| 627 |
|
|---|
| 628 | Parameters:
|
|---|
| 629 | scantab: scantable
|
|---|
| 630 | scannos: list of scan numbers
|
|---|
| 631 | smooth: optional box smoothing order for the reference
|
|---|
| 632 | (default is 1 = no smoothing)
|
|---|
| 633 | tsysval: optional user specified Tsys (default is 0.0,
|
|---|
| 634 | use Tsys in the data)
|
|---|
| 635 | tauval: optional user specified Tau
|
|---|
| 636 | """
|
|---|
| 637 | varlist = vars()
|
|---|
| 638 | from asap._asap import stmath
|
|---|
| 639 | from asap._asap import srctype
|
|---|
| 640 | stm = stmath()
|
|---|
| 641 | stm._setinsitu(False)
|
|---|
| 642 |
|
|---|
| 643 | # check = scantab.get_scan('*_fs*')
|
|---|
| 644 | # if check is None:
|
|---|
| 645 | # msg = "The input data appear to contain no Nod observing mode data."
|
|---|
| 646 | # raise TypeError(msg)
|
|---|
| 647 | s = scantab.get_scan(scannos)
|
|---|
| 648 | del scantab
|
|---|
| 649 |
|
|---|
| 650 | resspec = scantable(stm._dofs(s, scannos, smooth, tsysval,tauval,tcalval))
|
|---|
| 651 | ###
|
|---|
| 652 | if verify:
|
|---|
| 653 | # get data
|
|---|
| 654 | ssub = s.get_scan(scannos)
|
|---|
| 655 | #ssubon = ssub.get_scan('*calon')
|
|---|
| 656 | #ssuboff = ssub.get_scan('*[^calon]')
|
|---|
| 657 | sel = selector()
|
|---|
| 658 | sel.set_types( [srctype.foncal,srctype.foffcal] )
|
|---|
| 659 | ssub.set_selection( sel )
|
|---|
| 660 | ssubon = ssub.copy()
|
|---|
| 661 | ssub.set_selection()
|
|---|
| 662 | sel.reset()
|
|---|
| 663 | sel.set_types( [srctype.fson,srctype.fsoff] )
|
|---|
| 664 | ssub.set_selection( sel )
|
|---|
| 665 | ssuboff = ssub.copy()
|
|---|
| 666 | ssub.set_selection()
|
|---|
| 667 | sel.reset()
|
|---|
| 668 | import numpy
|
|---|
| 669 | precal={}
|
|---|
| 670 | postcal=[]
|
|---|
| 671 | keys=['fs','fs_calon','fsr','fsr_calon']
|
|---|
| 672 | types=[srctype.fson,srctype.foncal,srctype.fsoff,srctype.foffcal]
|
|---|
| 673 | ifnos=list(ssub.getifnos())
|
|---|
| 674 | polnos=list(ssub.getpolnos())
|
|---|
| 675 | for i in range(2):
|
|---|
| 676 | #ss=ssuboff.get_scan('*'+keys[2*i])
|
|---|
| 677 | ll=[]
|
|---|
| 678 | for j in range(len(ifnos)):
|
|---|
| 679 | for k in range(len(polnos)):
|
|---|
| 680 | sel.set_ifs(ifnos[j])
|
|---|
| 681 | sel.set_polarizations(polnos[k])
|
|---|
| 682 | sel.set_types(types[2*i])
|
|---|
| 683 | try:
|
|---|
| 684 | #ss.set_selection(sel)
|
|---|
| 685 | ssuboff.set_selection(sel)
|
|---|
| 686 | except:
|
|---|
| 687 | continue
|
|---|
| 688 | ll.append(numpy.array(ss._getspectrum(0)))
|
|---|
| 689 | sel.reset()
|
|---|
| 690 | #ss.set_selection()
|
|---|
| 691 | ssuboff.set_selection()
|
|---|
| 692 | precal[keys[2*i]]=ll
|
|---|
| 693 | #del ss
|
|---|
| 694 | #ss=ssubon.get_scan('*'+keys[2*i+1])
|
|---|
| 695 | ll=[]
|
|---|
| 696 | for j in range(len(ifnos)):
|
|---|
| 697 | for k in range(len(polnos)):
|
|---|
| 698 | sel.set_ifs(ifnos[j])
|
|---|
| 699 | sel.set_polarizations(polnos[k])
|
|---|
| 700 | sel.set_types(types[2*i+1])
|
|---|
| 701 | try:
|
|---|
| 702 | #ss.set_selection(sel)
|
|---|
| 703 | ssubon.set_selection(sel)
|
|---|
| 704 | except:
|
|---|
| 705 | continue
|
|---|
| 706 | ll.append(numpy.array(ss._getspectrum(0)))
|
|---|
| 707 | sel.reset()
|
|---|
| 708 | #ss.set_selection()
|
|---|
| 709 | ssubon.set_selection()
|
|---|
| 710 | precal[keys[2*i+1]]=ll
|
|---|
| 711 | #del ss
|
|---|
| 712 | #sig=resspec.get_scan('*_fs')
|
|---|
| 713 | #ref=resspec.get_scan('*_fsr')
|
|---|
| 714 | sel.set_types( srctype.fson )
|
|---|
| 715 | resspec.set_selection( sel )
|
|---|
| 716 | sig=resspec.copy()
|
|---|
| 717 | resspec.set_selection()
|
|---|
| 718 | sel.reset()
|
|---|
| 719 | sel.set_type( srctype.fsoff )
|
|---|
| 720 | resspec.set_selection( sel )
|
|---|
| 721 | ref=resspec.copy()
|
|---|
| 722 | resspec.set_selection()
|
|---|
| 723 | sel.reset()
|
|---|
| 724 | for k in range(len(polnos)):
|
|---|
| 725 | for j in range(len(ifnos)):
|
|---|
| 726 | sel.set_ifs(ifnos[j])
|
|---|
| 727 | sel.set_polarizations(polnos[k])
|
|---|
| 728 | try:
|
|---|
| 729 | sig.set_selection(sel)
|
|---|
| 730 | postcal.append(numpy.array(sig._getspectrum(0)))
|
|---|
| 731 | except:
|
|---|
| 732 | ref.set_selection(sel)
|
|---|
| 733 | postcal.append(numpy.array(ref._getspectrum(0)))
|
|---|
| 734 | sel.reset()
|
|---|
| 735 | resspec.set_selection()
|
|---|
| 736 | del sel
|
|---|
| 737 | # plot
|
|---|
| 738 | asaplog.post()
|
|---|
| 739 | asaplog.push('Plot only first spectrum for each [if,pol] pairs to verify calibration.')
|
|---|
| 740 | asaplog.post('WARN')
|
|---|
| 741 | p=asaplotgui.asaplotgui()
|
|---|
| 742 | #nr=min(6,len(ifnos)*len(polnos))
|
|---|
| 743 | nr=len(ifnos)/2*len(polnos)
|
|---|
| 744 | titles=[]
|
|---|
| 745 | btics=[]
|
|---|
| 746 | if nr>3:
|
|---|
| 747 | asaplog.post()
|
|---|
| 748 | asaplog.push('Only first 3 [if,pol] pairs are plotted.')
|
|---|
| 749 | asaplog.post('WARN')
|
|---|
| 750 | nr=3
|
|---|
| 751 | p.set_panels(rows=nr,cols=3,nplots=3*nr,ganged=False)
|
|---|
| 752 | for i in range(3*nr):
|
|---|
| 753 | b=False
|
|---|
| 754 | if i >= 3*nr-3:
|
|---|
| 755 | b=True
|
|---|
| 756 | btics.append(b)
|
|---|
| 757 | for i in range(nr):
|
|---|
| 758 | p.subplot(3*i)
|
|---|
| 759 | p.color=0
|
|---|
| 760 | title='raw data IF%s,%s POL%s' % (ifnos[2*int(i/len(polnos))],ifnos[2*int(i/len(polnos))+1],polnos[i%len(polnos)])
|
|---|
| 761 | titles.append(title)
|
|---|
| 762 | #p.set_axes('title',title,fontsize=40)
|
|---|
| 763 | ymin=1.0e100
|
|---|
| 764 | ymax=-1.0e100
|
|---|
| 765 | nchan=s.nchan()
|
|---|
| 766 | edge=int(nchan*0.01)
|
|---|
| 767 | for j in range(4):
|
|---|
| 768 | spmin=min(precal[keys[j]][i][edge:nchan-edge])
|
|---|
| 769 | spmax=max(precal[keys[j]][i][edge:nchan-edge])
|
|---|
| 770 | ymin=min(ymin,spmin)
|
|---|
| 771 | ymax=max(ymax,spmax)
|
|---|
| 772 | for j in range(4):
|
|---|
| 773 | if i==0:
|
|---|
| 774 | p.set_line(label=keys[j])
|
|---|
| 775 | else:
|
|---|
| 776 | p.legend()
|
|---|
| 777 | p.plot(precal[keys[j]][i])
|
|---|
| 778 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 779 | if not btics[3*i]:
|
|---|
| 780 | p.axes.set_xticks([])
|
|---|
| 781 | p.subplot(3*i+1)
|
|---|
| 782 | p.color=0
|
|---|
| 783 | title='sig data IF%s POL%s' % (ifnos[2*int(i/len(polnos))],polnos[i%len(polnos)])
|
|---|
| 784 | titles.append(title)
|
|---|
| 785 | #p.set_axes('title',title)
|
|---|
| 786 | p.legend()
|
|---|
| 787 | ymin=postcal[2*i][edge:nchan-edge].min()
|
|---|
| 788 | ymax=postcal[2*i][edge:nchan-edge].max()
|
|---|
| 789 | p.plot(postcal[2*i])
|
|---|
| 790 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 791 | if not btics[3*i+1]:
|
|---|
| 792 | p.axes.set_xticks([])
|
|---|
| 793 | p.subplot(3*i+2)
|
|---|
| 794 | p.color=0
|
|---|
| 795 | title='ref data IF%s POL%s' % (ifnos[2*int(i/len(polnos))+1],polnos[i%len(polnos)])
|
|---|
| 796 | titles.append(title)
|
|---|
| 797 | #p.set_axes('title',title)
|
|---|
| 798 | p.legend()
|
|---|
| 799 | ymin=postcal[2*i+1][edge:nchan-edge].min()
|
|---|
| 800 | ymax=postcal[2*i+1][edge:nchan-edge].max()
|
|---|
| 801 | p.plot(postcal[2*i+1])
|
|---|
| 802 | p.axes.set_ylim(ymin-0.1*abs(ymin),ymax+0.1*abs(ymax))
|
|---|
| 803 | if not btics[3*i+2]:
|
|---|
| 804 | p.axes.set_xticks([])
|
|---|
| 805 | for i in range(3*nr):
|
|---|
| 806 | p.subplot(i)
|
|---|
| 807 | p.set_axes('title',titles[i],fontsize='medium')
|
|---|
| 808 | x=raw_input('Accept calibration ([y]/n): ' )
|
|---|
| 809 | if x.upper() == 'N':
|
|---|
| 810 | p.unmap()
|
|---|
| 811 | del p
|
|---|
| 812 | return scabtab
|
|---|
| 813 | p.unmap()
|
|---|
| 814 | del p
|
|---|
| 815 | ###
|
|---|
| 816 | resspec._add_history("calfs",varlist)
|
|---|
| 817 | return resspec
|
|---|
| 818 |
|
|---|
| 819 | @asaplog_post_dec
|
|---|
| 820 | def merge(*args):
|
|---|
| 821 | """
|
|---|
| 822 | Merge a list of scanatables, or comma-sperated scantables into one
|
|---|
| 823 | scnatble.
|
|---|
| 824 | Parameters:
|
|---|
| 825 | A list [scan1, scan2] or scan1, scan2.
|
|---|
| 826 | Example:
|
|---|
| 827 | myscans = [scan1, scan2]
|
|---|
| 828 | allscans = merge(myscans)
|
|---|
| 829 | # or equivalent
|
|---|
| 830 | sameallscans = merge(scan1, scan2)
|
|---|
| 831 | """
|
|---|
| 832 | varlist = vars()
|
|---|
| 833 | if isinstance(args[0],list):
|
|---|
| 834 | lst = tuple(args[0])
|
|---|
| 835 | elif isinstance(args[0],tuple):
|
|---|
| 836 | lst = args[0]
|
|---|
| 837 | else:
|
|---|
| 838 | lst = tuple(args)
|
|---|
| 839 | varlist["args"] = "%d scantables" % len(lst)
|
|---|
| 840 | # need special formatting her for history...
|
|---|
| 841 | from asap._asap import stmath
|
|---|
| 842 | stm = stmath()
|
|---|
| 843 | for s in lst:
|
|---|
| 844 | if not isinstance(s,scantable):
|
|---|
| 845 | msg = "Please give a list of scantables"
|
|---|
| 846 | raise TypeError(msg)
|
|---|
| 847 | s = scantable(stm._merge(lst))
|
|---|
| 848 | s._add_history("merge", varlist)
|
|---|
| 849 | return s
|
|---|
| 850 |
|
|---|
| 851 | @asaplog_post_dec
|
|---|
| 852 | def calibrate( scantab, scannos=[], calmode='none', verify=None ):
|
|---|
| 853 | """
|
|---|
| 854 | Calibrate data.
|
|---|
| 855 |
|
|---|
| 856 | Parameters:
|
|---|
| 857 | scantab: scantable
|
|---|
| 858 | scannos: list of scan number
|
|---|
| 859 | calmode: calibration mode
|
|---|
| 860 | verify: verify calibration
|
|---|
| 861 | """
|
|---|
| 862 | antname = scantab.get_antennaname()
|
|---|
| 863 | if ( calmode == 'nod' ):
|
|---|
| 864 | asaplog.push( 'Calibrating nod data.' )
|
|---|
| 865 | scal = calnod( scantab, scannos=scannos, verify=verify )
|
|---|
| 866 | elif ( calmode == 'quotient' ):
|
|---|
| 867 | asaplog.push( 'Calibrating using quotient.' )
|
|---|
| 868 | scal = scantab.auto_quotient( verify=verify )
|
|---|
| 869 | elif ( calmode == 'ps' ):
|
|---|
| 870 | asaplog.push( 'Calibrating %s position-switched data.' % antname )
|
|---|
| 871 | if ( antname.find( 'APEX' ) != -1 ):
|
|---|
| 872 | scal = apexcal( scantab, scannos, calmode, verify )
|
|---|
| 873 | elif ( antname.find( 'ALMA' ) != -1 or antname.find( 'OSF' ) != -1 ):
|
|---|
| 874 | scal = almacal( scantab, scannos, calmode, verify )
|
|---|
| 875 | else:
|
|---|
| 876 | scal = calps( scantab, scannos=scannos, verify=verify )
|
|---|
| 877 | elif ( calmode == 'fs' or calmode == 'fsotf' ):
|
|---|
| 878 | asaplog.push( 'Calibrating %s frequency-switched data.' % antname )
|
|---|
| 879 | if ( antname.find( 'APEX' ) != -1 ):
|
|---|
| 880 | scal = apexcal( scantab, scannos, calmode, verify )
|
|---|
| 881 | elif ( antname.find( 'ALMA' ) != -1 or antname.find( 'OSF' ) != -1 ):
|
|---|
| 882 | scal = almacal( scantab, scannos, calmode, verify )
|
|---|
| 883 | else:
|
|---|
| 884 | scal = calfs( scantab, scannos=scannos, verify=verify )
|
|---|
| 885 | elif ( calmode == 'otf' ):
|
|---|
| 886 | asaplog.push( 'Calibrating %s On-The-Fly data.' % antname )
|
|---|
| 887 | scal = almacal( scantab, scannos, calmode, verify )
|
|---|
| 888 | else:
|
|---|
| 889 | asaplog.push( 'No calibration.' )
|
|---|
| 890 | scal = scantab.copy()
|
|---|
| 891 |
|
|---|
| 892 | return scal
|
|---|
| 893 |
|
|---|
| 894 | def apexcal( scantab, scannos=[], calmode='none', verify=False ):
|
|---|
| 895 | """
|
|---|
| 896 | Calibrate APEX data
|
|---|
| 897 |
|
|---|
| 898 | Parameters:
|
|---|
| 899 | scantab: scantable
|
|---|
| 900 | scannos: list of scan number
|
|---|
| 901 | calmode: calibration mode
|
|---|
| 902 |
|
|---|
| 903 | verify: verify calibration
|
|---|
| 904 | """
|
|---|
| 905 | from asap._asap import stmath
|
|---|
| 906 | stm = stmath()
|
|---|
| 907 | antname = scantab.get_antennaname()
|
|---|
| 908 | ssub = scantab.get_scan( scannos )
|
|---|
| 909 | scal = scantable( stm.cwcal( ssub, calmode, antname ) )
|
|---|
| 910 | return scal
|
|---|
| 911 |
|
|---|
| 912 | def almacal( scantab, scannos=[], calmode='none', verify=False ):
|
|---|
| 913 | """
|
|---|
| 914 | Calibrate ALMA data
|
|---|
| 915 |
|
|---|
| 916 | Parameters:
|
|---|
| 917 | scantab: scantable
|
|---|
| 918 | scannos: list of scan number
|
|---|
| 919 | calmode: calibration mode
|
|---|
| 920 |
|
|---|
| 921 | verify: verify calibration
|
|---|
| 922 | """
|
|---|
| 923 | from asap._asap import stmath
|
|---|
| 924 | stm = stmath()
|
|---|
| 925 | ssub = scantab.get_scan( scannos )
|
|---|
| 926 | scal = scantable( stm.almacal( ssub, calmode ) )
|
|---|
| 927 | return scal
|
|---|
| 928 |
|
|---|
| 929 | @asaplog_post_dec
|
|---|
| 930 | def splitant(filename, outprefix='',overwrite=False):
|
|---|
| 931 | """
|
|---|
| 932 | Split Measurement set by antenna name, save data as a scantables,
|
|---|
| 933 | and return a list of filename.
|
|---|
| 934 | Notice this method can only be available from CASA.
|
|---|
| 935 | Prameter
|
|---|
| 936 | filename: the name of Measurement set to be read.
|
|---|
| 937 | outprefix: the prefix of output scantable name.
|
|---|
| 938 | the names of output scantable will be
|
|---|
| 939 | outprefix.antenna1, outprefix.antenna2, ....
|
|---|
| 940 | If not specified, outprefix = filename is assumed.
|
|---|
| 941 | overwrite If the file should be overwritten if it exists.
|
|---|
| 942 | The default False is to return with warning
|
|---|
| 943 | without writing the output. USE WITH CARE.
|
|---|
| 944 |
|
|---|
| 945 | """
|
|---|
| 946 | # Import the table toolkit from CASA
|
|---|
| 947 |
|
|---|
| 948 | import casac
|
|---|
| 949 | tbtool = casac.homefinder.find_home_by_name('tableHome')
|
|---|
| 950 | tb = tbtool.create()
|
|---|
| 951 | tb2 = tbtool.create()
|
|---|
| 952 | # Check the input filename
|
|---|
| 953 | if isinstance(filename, str):
|
|---|
| 954 | import os.path
|
|---|
| 955 | filename = os.path.expandvars(filename)
|
|---|
| 956 | filename = os.path.expanduser(filename)
|
|---|
| 957 | if not os.path.exists(filename):
|
|---|
| 958 | s = "File '%s' not found." % (filename)
|
|---|
| 959 | raise IOError(s)
|
|---|
| 960 | # check if input file is MS
|
|---|
| 961 | if not os.path.isdir(filename) \
|
|---|
| 962 | or not os.path.exists(filename+'/ANTENNA') \
|
|---|
| 963 | or not os.path.exists(filename+'/table.f1'):
|
|---|
| 964 | s = "File '%s' is not a Measurement set." % (filename)
|
|---|
| 965 | raise IOError(s)
|
|---|
| 966 | else:
|
|---|
| 967 | s = "The filename should be string. "
|
|---|
| 968 | raise TypeError(s)
|
|---|
| 969 | # Check out put file name
|
|---|
| 970 | outname=''
|
|---|
| 971 | if len(outprefix) > 0: prefix=outprefix+'.'
|
|---|
| 972 | else:
|
|---|
| 973 | prefix=filename.rstrip('/')
|
|---|
| 974 | # Now do the actual splitting.
|
|---|
| 975 | outfiles=[]
|
|---|
| 976 | tb.open(tablename=filename+'/ANTENNA',nomodify=True)
|
|---|
| 977 | nant=tb.nrows()
|
|---|
| 978 | antnames=tb.getcol('NAME',0,nant,1)
|
|---|
| 979 | antpos=tb.getcol('POSITION',0,nant,1).transpose()
|
|---|
| 980 | tb.close()
|
|---|
| 981 | tb.open(tablename=filename,nomodify=True)
|
|---|
| 982 | ant1=tb.getcol('ANTENNA1',0,-1,1)
|
|---|
| 983 | tb.close()
|
|---|
| 984 | for antid in set(ant1):
|
|---|
| 985 | scan=scantable(filename,average=False,getpt=True,antenna=int(antid))
|
|---|
| 986 | outname=prefix+antnames[antid]+'.asap'
|
|---|
| 987 | scan.save(outname,format='ASAP',overwrite=overwrite)
|
|---|
| 988 | del scan
|
|---|
| 989 | outfiles.append(outname)
|
|---|
| 990 | del tb, tb2
|
|---|
| 991 | return outfiles
|
|---|
| 992 |
|
|---|
| 993 | @asaplog_post_dec
|
|---|
| 994 | def _array2dOp( scan, value, mode="ADD", tsys=False ):
|
|---|
| 995 | """
|
|---|
| 996 | This function is workaround on the basic operation of scantable
|
|---|
| 997 | with 2 dimensional float list.
|
|---|
| 998 |
|
|---|
| 999 | scan: scantable operand
|
|---|
| 1000 | value: float list operand
|
|---|
| 1001 | mode: operation mode (ADD, SUB, MUL, DIV)
|
|---|
| 1002 | tsys: if True, operate tsys as well
|
|---|
| 1003 | """
|
|---|
| 1004 | nrow = scan.nrow()
|
|---|
| 1005 | s = None
|
|---|
| 1006 | if len( value ) == 1:
|
|---|
| 1007 | from asap._asap import stmath
|
|---|
| 1008 | stm = stmath()
|
|---|
| 1009 | s = scantable( stm._arrayop( scan.copy(), value[0], mode, tsys ) )
|
|---|
| 1010 | del stm
|
|---|
| 1011 | elif len( value ) != nrow:
|
|---|
| 1012 | raise ValueError( 'len(value) must be 1 or conform to scan.nrow()' )
|
|---|
| 1013 | else:
|
|---|
| 1014 | from asap._asap import stmath
|
|---|
| 1015 | stm = stmath()
|
|---|
| 1016 | # insitu must be True
|
|---|
| 1017 | stm._setinsitu( True )
|
|---|
| 1018 | s = scan.copy()
|
|---|
| 1019 | sel = selector()
|
|---|
| 1020 | for irow in range( nrow ):
|
|---|
| 1021 | sel.set_rows( irow )
|
|---|
| 1022 | s.set_selection( sel )
|
|---|
| 1023 | if len( value[irow] ) == 1:
|
|---|
| 1024 | stm._unaryop( s, value[irow][0], mode, tsys )
|
|---|
| 1025 | else:
|
|---|
| 1026 | stm._arrayop( s, value[irow], mode, tsys, 'channel' )
|
|---|
| 1027 | s.set_selection()
|
|---|
| 1028 | sel.reset()
|
|---|
| 1029 | del sel
|
|---|
| 1030 | del stm
|
|---|
| 1031 | return s
|
|---|
