For concatenated observations, the overhead of 180sec for target
acquisition has to be added only for the first observation in the sequence.
All the following need only 20sec per observation (for concatenation see
the ISO OBSERVER'S MANUAL).
R.J. Laureijs, U. Klaas, D. Lemke, U. Herbstmeier, P. Abraham
Wed Aug 7 12:14:12 MET DST 1996
