Instrument Science Report CAL/FOS-147


FOS Cycle 6 Calibration Plan

M. Dahlem, A. Koratkar, C. Keyes, J. Hayes, A. Storrs, 
J. Christensen, E. Smith, 8. Martin 

May 28, 1996


ABSTRACT

This instrument report describes in detail the FOS Cycle 6 calibration 
program in terms of objects and planned observations. Cycle 6 will be 
the close-out of the FOS, which determines the timing ofthe FOS calibration 
measurements. No special calibrations will be performed. Thus, in Cycle 6 
we expect to maintain the routine calibration status ofthe instrument. The 
total spacecraft time required for the calibration program will be 75(93) 
orbits of external time and 128 orbits of internal occultation/parallel 
time. The number of external orbits will depend on the evaluation of a
Cycle 5 test to check whether close-out aperture throughput measurements 
will be necessary.