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Record Details

Record 8 of 13376
The Lunar Potential Determination Using Apollo-Era Data and Modern Measurements and Models
Author and Affiliation:
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, Goddard's Earth Science and Tech Center, Baltimore, MD, United States)
Stubbs, Timothy J.(Maryland Univ. Baltimore County, Goddard's Earth Science and Tech Center, Baltimore, MD, United States)
Webb, Phillip(Maryland Univ. Baltimore County, Goddard's Earth Science and Tech Center, Baltimore, MD, United States)
Hills, H. Kent(Perot Systems Government Services, Fairfax, VA, United States)
Delory, Greg(California Univ., Space Sciences Lab, Berkeley, CA, United States)
Abstract: Since 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.
Publication Date: Sep 08, 2008
Document ID:
20090006703
(Acquired Feb 10, 2009)
Subject Category: LUNAR AND PLANETARY SCIENCE AND EXPLORATION
Document Type: Conference Paper
Meeting Information: American Geophysical Union; 11 - 20 Dec. 2008; California; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ELECTRIC POTENTIAL; PHOTOELECTRIC EMISSION; ELECTRON DISTRIBUTION; MOON; LUNAR PROSPECTOR; REFLECTOMETERS; SOLAR WIND; LUNAR SURFACE; CALIBRATING; ENERGY SPECTRA; WAKES; PLASMA INTERACTIONS
Availability Source: Other Sources
Availability Notes: Abstract Only
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