Overview

The Mission Elapsed Time (MET) for a program of astronomical observations is determined by this tool. The observations are scheduled in a sequence that best minimizes the background and mission duration. The MET is computed from the required exposure times and operational overheads.


Input Data Specifications

Spacecraft/Telescope Architecture (ARCH)

Nominal JWST orbit -- large L2 Lissajous (2012.092 to 2027.124; 15-yr duration)
Alternative JWST orbit -- worst-case stray-light orbit (2011.254 to 2021.219; 10-yr duration)
Other: * See Note.

Integrated Science Instrument Module (ISIM)

JWST Requirements
JWST Goals
Other: * See Note.

Design Reference Mission (DRM)

Science Operations Design Reference Mission (SO-DRM)
Ad-Hoc Science Working Group (ASWG) Program
Other: * See Note.
Single Visit Form Input (Enter the data below)
Target
Coordinates , degrees
Coord. System

SI Configuration
Sci Instrument
Instr. Config
Readout Mode
Filter 1
Filter 2
Pupil/Grating 1
Pupil/Grating 2
Exposure Time seconds (per pointing-iteration)
Num. of iterations
Num. of positions
in dither pattern
Num. of FOV
positions
Total visit
exposure time
seconds
(calculated as: exp_time * num_iter * num_dith * num_fov)

*Note: User-supplied filenames should have a .txt extension.


Processing and Reporting Options

 Run in batch mode.
 Report input data as well as results.
 Sort the list of scheduled Observations by Visit ID instead of time
- scoring mode used by the greedy scheduling algorithm

Calendar length: years
Stray Light model: - for the OTA, sunshield, and background sources. NOTE that the finite-element model may take several hours to complete with the full DRM.
Comment string: (will be included in output file)



Please note that some MET requests may take several minutes to process.


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