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Earth Surface & Interior

During the 2009 IceBridge mission in the Antarctica and Southern Ocean a high-resolution, commercial available digital camera was added to the airborne sensor suite to capture detailed surface characteristics and to derive velocities from repeat flights. Hundreds of thousands of high-resolution images have been collected at sustained frame rates of 1.1 Hz and demonstrated the feasibility of the imaging data acquisition system. This proposal focuses on the photogrammetric processing of the collected data, including an analysis of the geometric stability of the camera and the fusion of imaging data with laser altimetry data. Data processing and analyzing is important to objectively assess the suitability of using a commercial camera instead of a much more expensive photogrammetry grade camera. Work performed under this proposal will have a major impact on the use of digital cameras in future IceBridge missions. We will also demonstrate the fusion of imagery with other sensory data resulting in new products, including 3-D fly-throughs and detailed roughness maps. In order to check the stability of the interior orientation of the camera and the mounting during an IceBridge mission, repeat in-situ camera calibrations will be performed, mainly with images obtained at the airport in Punta Arenas with ground control points established during the 2009 fall mission. Another useful stability check consists of registering the camera with the ATM laser altimetry system using sensor invariant features. The calibration will also determine the bore sighting parameters necessary for orienting the camera with navigation data from the Applanix system. Once the images are georeferenced, surface reconstruction begins. We will examine different algorithms and compare the results with our feature-based, multiple image matching approach that also forms the basis for determining velocities from multi-temporal images.

Project PI: Anton Schenk/University at Buffalo

Email: schenk.2@osu.edu

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Started: Sep 27, 2010

Last Activity: Mar 16, 2011

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