APPM Colloquium - Paul Sava
Paul Sava, Department of Geophysics, Colorado School of Mines
3D radar wavefield imaging of comet interiors
The Rosetta mission to comet 67P/C-G revolutionized comet science, but left major questions on the table. Are cometary nuclei primordial or are they collisionally-evolved as predicted by modern theories of planet formation? The CONSERT radar experiment sounded the interior of the nucleus showing it to be transparent to a depth of kilometers at 90 MHz, thus demonstrating the feasibility of a 3D global reflection tomography. A future radar exploration mission could acquire a dense network of in-phase radar echoes from orbit to obtain a high resolution 3D image. Full wavefield tomography facilitates high quality imaging of the comet interiors, particularly if the comet nucleus is characterized by complex structure and large contrasts of physical properties. Knowledge of the comet shape and all-around orbital radar acquisition enable accurate and computationally-efficient 3D wavefield tomography. In this presentation I will discuss theoretical and computational techniques necessary to achieve high-resolution radar imaging of comet interiors.
Friday, September 14, 2018 at 3:00pm to 4:00pm
Engineering Center, ECCR 245
1111 Engineering Drive, Boulder, CO 80309