)
In the Cookbook of the ISOCAM Observer's Manual one often speaks of
observing times while in PGA the number of exposures has to be
entered. Also the definition of N is not always correct in the
ISOCAM Observer's Manual. For this reason we recall here the
definition of the quantity N . One should remeber that it
depends on the AOT.
is the number of frame per satellite position, is the number of frames per CVF step, is the total number of frames taken on the source
per cycle.
where
is the on source position,
is the reference off source position one and
is the last reference off source
position.