
\tipVerbose\ observations are done to measure the transmission 
of the Earth's athmosphere, by taking data at several
points with the same azimuth but different elevations, spaced by equal
steps in ``air mass''.

It is ESSENTIAL that the switching mode is \total\ during \tip.

This is in particular an important step in the calibration of
observations with the bolometer.

The basic parameters of this observing mode and its options are:
the azimuth,
the range and step in airmass, and
the time per subscan.



