5. Concatenating observations
A FOT contains data from one OP (Observing Period)
A FOT usually contain a single normal OP plus the preceding and following slew OPs if applicable.
An OP is defined essentially as one continuous time interval with
constant pointing, or a slew manouvre. Non-classifiable intervals are named contingency OPs)
In turn each OP can be divided in a number of finer time intervals called
The names of observing period and observations used for SAX are mutuated from
The equivalent names for
have later been changed to observation and exposure, respectively.
An observation boundary (change) occurs whenever the instrument configuration is modified by
a telecommand (or of course at an OP boundary)
Of course only observations in the same or compatible configuration can be concatenated
together. Before proceeding to concatenation, one shall check the instrument configuration.
The following procedure is recommended.