SOURCE: Source information

Name Format Units Measure Comments Keywords Columns Keys

SOURCE_ID TpInt Source id

TIME TpDouble s EPOCH Midpoint of time for which this set of parameters is accurate

INTERVAL TpDouble s EPOCH Interval

FREQUENCY_ID TpInt Frequency id Data description Data

NAME TpString Name of field as given during observations

CODE TpString Special characteristics of source, e.g. Bandpass calibrator

DIRECTION TpDouble (2) rad DIRECTION Direction (e.g. RA, DEC)

PROPER_MOTION TpDouble (2) rad/s Proper motion

POSITION TpDouble (3) m POSITION Position (e.g. for solar system objects)

SYSVEL TpDouble m/s VELOCITY Systemic velocity at reference

CALIBRATION_GROUP TpInt # grouping for calibration purpose Flags