The JWST Science Operations Design Reference Mission

Details The JWST Science Operations Design Reference Mission The JWST Science Operations Design Reference Mission

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20711520p&link_type=abstract

American Astronomical Society Meeting 207, #115.20; Bulletin of the American Astronomical Society, Vol. 37, p.1353

Astronomy and Astrophysics

Astronomy

Scientific paper

We have developed a sample observing program for James Webb Space Telescope (JWST) that represents 1.7 years of operations and have used that program in studies of possible operations scenarios. The Science Operations Design Reference Mission (SO-DRM) is comprised of science, calibration, and observatory maintenance programs that we developed from the JWST Science Working Group Science Requirements Document. Our programs are comprised of observations that are specified at a level of detail sufficient to plan and schedule observations (similar to HST Phase II specifications). These observations meet the science requirements of each program, the operational limitations imposed by the spacecraft design, and ground system rules. We have also developed a computer application, JWST Mission Simulator (JMS), to represent the execution of the observing program and to create a feasible and optimized schedule of observations. Furthermore, we have modified a version of the HST long-range planning and scheduling application, Spike, to carry out JWST planning and scheduling studies. Using these tools we have carried out several science systems engineering studies to demonstrate the feasibility of operational scenarios and their parametric sensitivity. To those ends, we have created schedules of SO-DRM observations that represent a typical one-year observing cycle using a greedy scheduling algorithm, or planning preferences for maximum S/N and minimum solar torque. We have studied the oversubscription of the observing pool necessary to achieve a high rate of utilization of the observatory. We have studied perturbations of these processes in order to quantify the stability of observing schedules. Results from these studies are presented.

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