MAIN table: Coordinates, Data, pointers and Flags

Name Format Units Measure Comments Keywords Columns Coordinate information

TIME TpDouble s EPOCH Midpoint of the integration.

DURATION TpFloat s DURATION Length of integration

EXPOSURE TpFloat s DURATION The effective integration time

ANTENNA1 TpInt First antenna

ANTENNA2 TpInt Second antenna

UVW TpDouble(3) m UVW UVW coordinates

FEED1 TpInt Feed on ANTENNA1

FEED2 TpInt Feed on ANTENNA2

PULSAR_BIN TpInt Pulsar bin number

SCAN_NUMBER TpInt Scan Number Pointers into subtables

ARRAY_ID TpInt

SOURCE_ID TpInt

FIELD_ID TpInt

FREQUENCY_ID TpInt

OBSERVATION_ID TpInt

CORRELATOR_ID TpInt

PULSAR_ID TpInt Data description columns

NUM_CHAN TpInt # spectral channels

NUM_CORR TpInt # correlations

CORRELATION_TYPE TpInt (2, NUM_CORR) (see below) Data

DATA TpComplex (NUM_CORR, NUM_CHAN) Complex visibility matrix.

SIGMA TpFloat (NUM_CORR, NUM_CHAN) Estimated rms noise. Flag information

FLAG TpBool (NUM_CORR, NUM_CHAN) The data flags

Notes:

ANTENNA1, ANTENNA2

For Single dish ANTENNA1=ANTENNA2

PULSAR_BIN

For a pulsar the correlations are assumed to be measured for a limited number of pulse phase bins. This is the particular bin for which this data was measured.

NUM_CORR

RR would be 1, RR, LL would be 2, XX,YY,XY,YX would be 4, etc.

CORRELATION_TYPE

To get the meaning, see the relevant FEED table. An example would be (0,0), (0,1), (1,0), (1,1) for all correlations between whatever the receptors on FEED1 and FEED2 are measuring

FLAG

Is an array of bools with same shape as data. Data is flagged bad if FLAGS is True.

Next I give the description of the various subtables. The columns are categorized into Keys, Data description, Data, and Flags.