The Shortwave ImageR and Spectrometer for Europa (SIRSE). A. A.

46th Lunar and Planetary Science Conference (2015)
The Shortwave ImageR and Spectrometer for Europa (SIRSE). A. A. Simon1, D. Reuter1, C. Olkin2, S. A.
Stern2, J. Emery3, W. Grundy4, R. Hudson1, J. Rathbun5, P. Schenk6 and R. Vervack7. 1NASA’s Goddard Space
Flight Center, 2Southwest Research Institute, 3U. Tennessee, 4Lowell Observatory, 5Planetary Science Institute,
Lunar and Planetary Institute, 7Johns Hopkins Applied Physics Lab.
Introduction: The SIRSE instrument provides two
payload elements in one, reducing complexity, mass,
and power, while providing flexibility in operations
and accommodations. SIRSE will deliver an unparalled scientific dataset of co-registered spectral imaging at 10-nm spectral resolution and panchromatic stereo data. It is based on extensive instrument heritage,
including the New Horizons Ralph instrument, and
leverages the strong partnership and experience of
GSFC and SwRI in building and operating these instruments (Reuter et al. 2008. Space Sci. Rev. 140,
Science Objectives: SIRSE has been optimized to
meet broad science goals for either a Europa flyby or
orbiter mission:
Characterize ice shell and surface-ice-ocean exchange
• Map landforms at high vertical and horizontal
resolution, with correlated spectral mapping
Determine surface composition and chemistry
• Map global composition, correlate geologic features with local composition, and search for key astrobiological & volatile spectral features
Understand surface features and search for active
• Study chaos, impact craters, double ridges and
bands, search for active plumes and deposits, and
provide upper limits on thermal anomalies
Understand magnetospheric-surface interactions
• Map hemispheric composition, search for radiolytic products in local geology, and determine surface radiative transfer properties
Characterize compelling landing sites and assess hazards
• Find sites with unique chemistry, search for sites
with recent or current activity, and constrain local
topography and slopes