A MIRIAD uv dataset is composed of a collection of items and `
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 centers).
Table D.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 (never 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; delhd (or rm) this item to disable gain table |
| bandpass | complex | bandpass function gains; delhd (or rm) this item to disable passband corrections |
| freqs | mixed | frequency set up description table for `bandpass' |
| nspect0 | integer | number of windows in the bandpass function |
| nchan0 | integer | total number of channels in the bandpass function |
| 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) |
| freq0 | double | reference frequency for delay terms |
| leakage | complex | polarization leakage parameters |
| cgains | complex | baseline based channel gains |
| ncgains | integer | |
| ncbase | integer | |
| wgains | complex | baseline based wideband gains |
| nwgains | integer | |
| nwbase | integer |
SADLY, the latex2html converter does not deal with this table very well, please consult the online PDF version for this table