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Data Reduction Options
K. O'Neil
GBT & Arecibo:
. GBT and Arecibo data both produce binary fits
. Keywords WCS compatible
. Attempting to insure all other keywords match
. Eventually data format may also match
. Goal is to be able to readily share data reduction programs
GBT -- Data Formats:
. Goal towards making data accessible to as many data reduction packages as
possible
­ Let user choose what program they want
­ Take advantage of anything that's already been done
. Programs in current use:
-- Mathematica: uses GBT fits files, used mostly by engineers
-- Aips++: Have MS filler, plus has online display programs
-- IDL: reads GBT/AO fits files
-- Python: reads GBT/AO fits files, plus has online display programs
GBT Data Reduction
. Observers/Engineers reduce data three ways:
-- Prepackaged `black box' packages (e.g. the aips++ `calib' routine)
-- `Roll your own'
-- Something in between
. How to help users:
-- Write GBT specific routines (calibration, beam map removal, etc) in a c++
routines callable by most any data reduction package
-- Offer `fillers' to measurements sets, class fits, and AO/GBT fits which
can calibrate data if desired
-- Document all calibration routines
Overall Goal is to take advantage of what is already done, while allowing as much
flexibility as possible.