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Development of the WFIRST CGI Integral Field SpectrographFuture mission concepts such as LUVOIR and HabEx have baselined integral field spectrographs (IFS) for their coronagraph instruments. Exoplanet detection with an IFS has strong heritage at ground observatories, but to support future missions the WFIRST coronagraph instrument (CGI) must demonstrate the ability to measure exoplanet spectra with an IFS approaching contrast levels sufficient for future missions. The spectral resolution of the CGI IFS is R50 over a 20% bandpass within 600 and 970 nm. The bands and spectral resolution optimize signal-to-noise against sufficient sampling of methane absorption features expected in the exoplanet atmosphere. In addition to demonstrating on-orbit high contrast with the IFS, showing sufficient stability over very long observing periods with time resolved data in simultaneous spatial and spectral dimensions is key to the IFS demonstration. We present the impact of long durations and tight tolerances, how they drive the IFS design and performance.
Document ID
20190029046
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
Groff, Tyler D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Zimmerman, Neil
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rizzo, Maxime
(Conceptual Analytics, LLC Glenn Dale, MD, United States)
Gaylin, Samuel
(Genesis Engineering Solutions, Inc. Lanham, MD, United States)
Titus, John
(Applied Technology Associates (ATA) Aerospace Greenbelt, MD, United States)
Mountcastle, Rose
(Lentech, Inc. Greenbelt, MD, United States)
Gong, Qian
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mandell, Avi
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Harvey, David
(Genesis Engineering Solutions, Inc. Lanham, MD, United States)
Date Acquired
August 13, 2019
Publication Date
August 11, 2019
Subject Category
Optics
Report/Patent Number
GSFC-E-DAA-TN70794
Meeting Information
Meeting: SPIE Optics + Photonics
Location: San Diego, CA
Country: United States
Start Date: August 11, 2019
End Date: August 15, 2019
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: 80GSFC18C0120
CONTRACT_GRANT: NNG15CR64C
Distribution Limits
Public
Copyright
Public Use Permitted.
Technical Review
Single Expert
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