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ExEP Yield Modeling Tool and Validation Test Results

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dc.contributor.author Morgan, Rhonda
dc.contributor.author Turmon, Michael
dc.contributor.author Delacroix, Christian
dc.contributor.author Savransky, Dmitry
dc.contributor.author Garett, Daniel
dc.contributor.author Lowrance, Patrick
dc.contributor.author Liu, Xiang Cate
dc.contributor.author Nunez, Paul
dc.date.accessioned 2020-03-23T19:15:45Z
dc.date.available 2020-03-23T19:15:45Z
dc.date.issued 2017-08-06
dc.identifier.citation 2017 SPIE Optics and Photonics, San Diego, California, August 6-10, 2017 en_US
dc.identifier.clearanceno CL#17-4459
dc.identifier.uri http://hdl.handle.net/2014/47756
dc.description.abstract EXOSIMS is an open-source simulation tool for parametric modeling of the detection yield and characterization of exoplanets. EXOSIMS has been adopted by the Exoplanet Exploration Programs Standards De nition and Evaluation Team (ExSDET) as a common mechanism for comparison of exoplanet mission concept studies. To ensure trustworthiness of the tool, we developed a validation test plan that leverages the Python-language unit-test framework, utilizes integration tests for selected module interactions, and performs end-to-end cross- validation with other yield tools. This paper presents the test methods and results, with the physics-based tests such as photometry and integration time calculation treated in detail and the functional tests treated summarily. The test case utilized a 4m unobscured telescope with an idealized coronagraph and an exoplanet population from the IPAC radial velocity (RV) exoplanet catalog. The known RV planets were set at quadrature to allow deterministic validation of the calculation of physical parameters, such as working angle, photon counts and integration time. The observing keepout region was tested by generating plots and movies of the targets and the keepout zone over a year. Although the keepout integration test required the interpretation of a user, the test revealed problems in the L2 halo orbit and the parameterization of keepout applied to some solar system bodies, which the development team was able to address. The validation testing of EXOSIMS was performed iteratively with the developers of EXOSIMS and resulted in a more robust, stable, and trustworthy tool that the exoplanet community can use to simulate exoplanet direct-detection missions from probe class, to WFIRST, up to large mission concepts such as HabEx and LUVOIR. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2017 en_US
dc.title ExEP Yield Modeling Tool and Validation Test Results en_US
dc.type Preprint en_US


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