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The Lunar Potential Determination Using Apollo-Era Data and Modern Measurements and ModelsSince the Apollo era the electric potential of the Moon has been a subject of interest and debate. Deployed by three Apollo missions, Apollo 12, Apollo 14 and Apollo 15, the Suprathermal Ion Detector Experiment (SIDE) determined the sunlit lunar surface potential to be about +10 Volts using the energy spectra of lunar ionospheric thermal ions accelerated toward the Moon. More recently, the Lunar Prospector (LP) Electron Reflectometer used electron distributions to infer negative lunar surface potentials, primarily in shadow. We will present initial results from a study to combine lunar surface potential measurements from both SIDE and the LP/Electron Reflectometer to calibrate an advanced model of lunar surface charging which includes effects from the plasma environment, photoemission, secondaries ejected by ion impact onto the lunar surface, and the lunar wake created downstream by the solar wind-lunar interaction.
Document ID
20090006703
Document Type
Conference Paper
Authors
Collier, Michael R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Farrell, William M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Espley, Jared (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Webb, Phillip (Maryland Univ. Baltimore County Baltimore, MD, United States)
Stubbs, Timothy J. (Maryland Univ. Baltimore County Baltimore, MD, United States)
Webb, Phillip (Maryland Univ. Baltimore County Baltimore, MD, United States)
Hills, H. Kent (Perot Systems Government Services Fairfax, VA, United States)
Delory, Greg (California Univ. Berkeley, CA, United States)
Date Acquired
August 24, 2013
Publication Date
September 8, 2008
Subject Category
Lunar and Planetary Science and Exploration
Meeting Information
American Geophysical Union(California)
Distribution Limits
Public
Copyright
Other