** Next:** What was the measurement?
** Up:** Observational data
** Previous:** Observational data

A certain minimum set of data is required to make observations reducible.
These are the identity of the object measured; the identity of the bandpass in
which the measurement was made; the time of the observation; and, for
integration-type measurements, the duration of the integration.
Table I.17 describes the basic table-file columns in detail.

*Petra Nass*

*1999-06-15*