2.2 Knowledge of Instrument Performance
There are some critical aspects of the performance of COS that will not be known in detail until COS is installed into HST and fully calibrated. The information presented in this Handbook (sensitivities, for example), is based on data from tests performed on the ground and represents our current best understanding of COS. Proposers for Cycle 17 are unlikely to receive updated information before the proposal deadline, but they are urged to check the STScI web pages before submission.
