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Gazing at the Solar System: Capturing the Evolution of Dunes, Faults, Volcanoes, and Ice from Space

Donnellan, Andrea and Hallet, Bernard and Leprince, Sébastien (2014) Gazing at the Solar System: Capturing the Evolution of Dunes, Faults, Volcanoes, and Ice from Space. . (Unpublished) http://resolver.caltech.edu/CaltechAUTHORS:20190213-133231585

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Abstract

Gazing imaging holds promise for improved understanding of surface characteristics and processes of Earth and solar system bodies. Evolution of earthquake fault zones, migration of sand dunes, and retreat of ice masses can be understood by observing changing features over time. To gaze or stare means to look steadily, intently, and with fixed attention, offering the ability to probe the characteristics of a target deeply, allowing retrieval of 3D structure and changes on fine and coarse scales. Observing surface reflectance and 3D structure from multiple perspectives allows for a more complete view of a surface than conventional remote imaging. A gaze from low Earth orbit (LEO) could last several minutes allowing for video capture of dynamic processes. Repeat passes enable monitoring time scales of days to years. Numerous vantage points are available during a gaze (Figure 1). Features in the scene are projected into each image frame enabling the recovery of dense 3D structure. The recovery is robust to errors in the spacecraft position and attitude knowledge, because features are from different perspectives. The combination of a varying look angle and the solar illumination allows recovering texture and reflectance properties and permits the separation of atmospheric effects. Applications are numerous and diverse, including, for example, glacier and ice sheet flux, sand dune migration, geohazards from earthquakes, volcanoes, landslides, rivers and floods, animal migrations, ecosystem changes, geysers on Enceladus, or ice structure on Europa. The Keck Institute for Space Studies (KISS) hosted a workshop in June of 2014 to explore opportunities and challenges of gazing imaging. The goals of the workshop were to develop and discuss the broad scientific questions that can be addressed using spaceborne gazing, specific types of targets and applications, the resolution and spectral bands needed to achieve the science objectives, and possible instrument configurations for future missions. The workshop participants found that gazing imaging offers the ability to measure morphology, composition, and reflectance simultaneously and to measure their variability over time. Gazing imaging can be applied to better understand the consequences of climate change and natural hazards processes, through the study of continuous and episodic processes in both domains.


Item Type:Report or Paper (Technical Report)
Additional Information:© 2015 California Institute of Technology. Government Support Acknowledged. During the week of June 16-20, 2014 scientists and engineers met to discuss the value of gazing imaging and possible observational strategies for a wide variety of applications. This report summarizes the results of the workshop. The workshop was supported by the W.M. Keck Institute for Space Studies (KISS), the California Institute of Technology’s Tectonics Observatory, and the Jet Propulsion Laboratory’s Research and Technology Development Program under contract with NASA.
Group:Keck Institute for Space Studies
Funders:
Funding AgencyGrant Number
Keck Institute for Space Studies (KISS)UNSPECIFIED
Caltech Tectonics ObservatoryUNSPECIFIED
JPL Research and Technology Development FundUNSPECIFIED
DOI:10.26206/QZX3-9H37
Record Number:CaltechAUTHORS:20190213-133231585
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190213-133231585
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92886
Collection:CaltechAUTHORS
Deposited By: Iryna Chatila
Deposited On:15 Feb 2019 22:33
Last Modified:21 Mar 2019 21:52

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