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SUMMARY:Digital Moon and the Challenges of Whole Planet Modeling - Dave Pa
 ige (UCLA)
DTSTART:20100823T150000Z
DTEND:20100823T160000Z
UID:TALK25766@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:With advances in parallel processing hardware and software\, i
 t has been possible build physical models to explore larger and more compl
 ex systems. As a planetary scientist that studies the surfaces of planets\
 , I have become interested in modeling the surfaces of whole planets. Orbi
 tal remote sensing satellites are providing detailed information regarding
  the 3-dimensional shapes and other physical properties of planetary surfa
 ces. The challenge is to integrate these large datasets into a framework t
 hat can be used for analysis of these data\, as well as physical models to
  better understand the observations.\n\nI am currently involved with the D
 iviner Lunar Radiometer Experiment on NASA's Lunar Reconnaissance Orbiter 
 mission\, which is the first instrument to comprehensively map the tempera
 ture of the surface of the Moon. We have used laser altimeter data to cons
 truct a 3-d mesh representation of the whole Moon (the Digital Moon) that 
 we are using as a starting point for our modeling activities. Our approach
  uses ray tracing to calculate multiple scattering of solar and infrared r
 adiation between surfaces to make the first realistic calculations of glob
 al lunar surface and subsurface temperatures as a function of time. The co
 de is implemented in an MPI framework on our own 768-core linux cluster. O
 ur challenge is to expand the scope of the model to seamlessly handle mult
 iple resolution scales ranging from millimeters to hundreds of km.\n\nDivi
 ner Home Page: http://diviner.ucla.edu\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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