Special NAUG - 2007-Jan-03

Progress/Status EVLA TST

• calibrator models - high frequency images are available; currently, the images are stored and are scaled appropriately for their band - we will work on enabling an OTF scaling to the appropriate frequency:

• data selection - Will keep the index specifiers (fieldid, etc) for now.
  • Three changes:
    • add field parameter

fieldid:---> field: takes a single string (spaces separate the names of the fields)
            it does a minimum match on each string so:
            field='133'
            field='1331+305'
            field='1331+30500002_0' (Field Name reported in listobs)
                are all equivalent

            Multiple fields are specified as:
            field='133 144' 
                will get you fields: 1331+30500002_0, 1445_09900002_0

        Implemented in: clean, contsub, exportuvfits, flagdata, flagxy, ft, invert,
                        mosaic, plotxy, setjy, split

• • • added field,spwid (to eventually replace msselect) in:
      • bandpass, blcal, correct, fringecal, gaincal, pointcal, uvmodelfit
    • Refant now refers to antenna name; Note: still needs calplot to use antenna names not indices
      • bandpass, blcal, fringecal, gaincal, pointcal

• error trapping within tasks 20070105
• makemask task - support for clean boxes - Do we still need a makemask task?
  • added cleanbox parameter to clean, mosaic;
    • this will take a list (or list of lists):
      • cleanbox=[blcx,blcy,trcx,trcy]
      • cleanbox=[[blcx,blcy,trcx,trcy],[blcx,blcy,trcx,trcy],...]
      • cleanbox=filename
        • compliant with clean boxes in AIPS BOXFILE parameter - Note: can not currently handle the different 'cards' (C,F,W, etc).
        • accepts a file like:

# fieldname blc-x blc-y trc-x trc-y  -- as in AIPS BOXFILE
0 60 60 75 75                        # or
0 18:30:24.0 -05.15.00 18:30:26.0 -05:15:15

• Task History
  • remove tool level history (okay?)
  • add task level history
    • ms - clearcal, contsub, correct, flagautocorr, flagdata, fluxscale, ft, importvla, importasdm, importuvfits, setjy, split,
    • image - clean, feather, invert, mosaic

CASA 2007 Calendar

• Update: Crystal will be in Socorro from Feb 4 to Feb

Flagging proposal - just the tool level interface

• Question: Does this cover your flagging interactions; if not, please state it.
• Question: What algorithms should be ported from AIPS first?

• Interface
  • data selection by:
    • antennanames (antennaid), spwid, fieldnames (fieldid), uvdist, time, correlation, (nchan, start, width)
    • any other parameters needed?
  • manual flagging:
    • antenna, autocorrelation, baseline, fieldnames, spwid, channels, freqs, timerange, timeslot, clip, quack, unflag
    • other parameters?
  • algorithms
    • timemedian, freqmedian, spectralrejection, uvbin
    • what others first?
  • summary/statistics
    • get percentage of data flagged vs antenna, baseline, spwid, channel, correlations, time
    • other statistics?
  • queries
    • return list of antennas, channels, baselines, times with more or less than a specified percentage of flagged data.
  • extend flags
    • use queries to extend flags (e.g, flag all channels that have more than 70% of the data flagged)
  • extend flag scope
    • extend by time, channel, baseline, polarization, spwid, spectral/time averages
  • other functions
    • flag history - append to history file
    • flag reset - reset flags

• Received comments
  • LD-20070103

• Draft document
  • Casapy flag tool : Functionality and User-Interface