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SIM Global Astrometry

Dr. Mark Milman, Jet Propulsion Laboratory
When Mar 25, 2011
from 02:30 PM to 04:00 PM
Where Building 56, Large Conference Room
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Coffee, Cookies: 10:30 - 11:00 a.m.

Talk:  11:00 a.m. - noon



SIM was originally conceived as an astrometric instrument relying on a combination of three interferometers and extremely precise metrology gauges to achieve micro-arcsecond class astrometry. Because of its relatively narrow field of view, SIM builds a grid of objects that span the celestial sphere to perform both narrow angle and global astrometry. This talk will give an overview of how SIM produces its fundamental measurement, and then proceeds to describe the evolution from the single measurement to the global system of equations from which the astrometric parameters of the grid objects are derived. A description of a reduction technique to reduce the global system that contains both instrument and astrometric parameters into a more manageable system of equations is given. Some benefits of this reduced system are also discussed.

Brief Bio:

Dr. Mark Milman is currently a senior scientist at NASA's Jet Propulsion Laboratory (JPL) where he is the Control System Analysis Lead on the SMAP program.  Prior to that, Dr. Milman spent ten year as a mathematical analyst on the Space Interferometry Mission (SIM), where he led the integrated technical modeling and simulation activity for the mission.  Dr. Milman holds a BA in Mathematics from UCLA and a PhD in Mathematics from USC.  He has authored over 100 journal and proceedings articles on a variety of topics related to space instrumentation and data reduction and analysis, including many on various aspects of astrometry and is the recipient of numerous NASA awards for his work at JPL.



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