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To facilitate the new capabilities of the MWAX system, a few new key/value pairs have been added to the metafits file format. Default values can be assumed, in the absence of these new key/value pairs.

KeyValuesDefault (if not present)Notes
DELAYMOD
  • "NODELAYS"
  • "CABLE"
  • "TILEBEAM"
  • "FULL"
"NODELAYS"Human readable representation of the 3 "DEL" keys
DELDESC
  • "No delays applied"
  • "Apply cable delays and phase to zenith"
  • "Phase up to primary beam pointing direction"
  • "Phase to source with real-time calibration"
"No delays applied"Human readable description of the 3 "DEL" keys

The above key/values are shorthand for specific settings of 3 new keys describing how delay corrections are handled:

KeyValues
CABLEDEL
  • 0 == off
  • 1 == on
GEODEL
  • 0 == off
  • 1 == zenith
  • 2 == tile-pointing
  • 3 == az/el table
CALIBDEL
  • 0 == off
  • 1 == on
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