|Space Telescope Science Institute|
|COS Instrument Handbook|
12.1 In this chapter, we provide a brief overview of the calibration observations obtained during ground testing and on-orbit through Cycle 21. Potential Cycle 22 observers should assume that all of these calibrations will be completed by the time that Cycle 22 begins.Observers who wish to use instrument configurations that are not addressed by these calibration plans should assess their specific calibration needs and include time in their Phase I proposal for any additional calibrations that are required. Proposers who believe that more extensive calibration observations or analysis may be of general benefit to the COS user community should consider submitting a Cycle 22 Calibration Outsourcing Proposal (see the Cycle 22 Call for Proposals for details).