|Space Telescope Science Institute|
|COS Instrument Handbook|
The Cycle 20 calibration plans for COS will continue the routine calibration and monitoring observations performed in Cycles 17–19. The priorities assigned to the calibration of various COS modes will be determined by the approved GO programs in each cycle.
If your program requires calibrations beyond those beyond those described here, then you should explicitly include this calibration in your Phase I proposal.