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A Miriad uv dataset is composed of a collection of items and `u-v variables'. The variables are parameters that are known at the time of the observation, and include measured data, and the description of the observation set up (e.g. correlator set up and observing centres).
Table C.1 gives a list of the items that are used to build up a Miriad uv dataset.
| Item name | Type | Description |
| obstype | ascii | value: `cross', `auto' or `mixed' |
| history | text | history text file (in principle editable) |
| vartable | text | lookup table for all uv variables (do not edit!) |
| visdata | mixed | data stream of uv variables |
| flags | integer | optional flags for narrowband data |
| wflags | integer | optional flags for wideband data |
| gains | mixed | antenna gain table |
| nfeeds | integer | number of feeds on each antenna |
| ntau | integer | Number of delay/spectral index terms per antenna |
| in `gains' | ||
| nsols | integer | number of records in `gains' |
| ngains | integer | number of antenna gains in each record of `gains' |
| interval | double | gain interpolation time tolerance (days) |
| leakage | complex | polarization leakage parameters |
| freq0 | double | reference frequency for delay terms |
| freqs | mixed | frequency set up description table for `bandpass' |
| bandpass | complex | bandpass function gains |
| nspect0 | integer | number of windows in the bandpass function |
| nchan0 | integer | total number of channels in the bandpass function |
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