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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<meta name="keywords" content="Planetary Data System Geosciences Node">
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<title>PDS Geosciences Node Data and Services: Lunar Prospector Reduced
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Spectrometer Data Special Products</title>
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<meta name="description" content="This site provides planetary science data, tools, and documentation from the PDS Geosciences Node.">
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<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
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</style> </head>
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<body>
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<p>Lunar
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Prospector Reduced Spectrometer Data - Special Products</p>
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<p>These Lunar Prospector (LP) gamma ray and neutron
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spectrometer special products and associated documentation have been prepared by the LP Spectrometer
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Team as part of a NASA Lunar Data
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Analysis Program. These spectrometer data products integrate data collected between
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January 16, 1998 and July 31, 1999. The data file descriptions for these
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products were provided by: </p>
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<center>
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<p>William C. Feldman, Tom H. Prettyman, Richard D. Belian, Richard C. Elphic, <br>
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Olivier Gasnault, David J. Lawrence, Stefanie L. Lawson, and Kurt R. Moore
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<br>Los Alamos National Laboratory, Los Alamos, NM </p>
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<p>Alan B. Binder
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<br>Lunar Research Institute, Tuscon, AZ
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<p>Sylvestre Maurice
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<br>Observatoire Midi-Pyrenees, Toulouse, France
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</center>
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<p><strong>IMPORTANT: The data on this page
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are special products that may be of interest to the geoscience community. They do not represent a PDS peer-reviewed
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archive. Please contact <a href="mailto:wfeldman@lanl.gov">William Feldman</a>
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or <a href="mailto:djlawrence@lanl.gov">David Lawrence</a> of LANL for more
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information. Please report any
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other anomalies in the data or documentation to
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<a href="mailto:geosci@wunder.wustl.edu">geosci@wunder.wustl.edu</a>.</strong></p>
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<p><strong style="font-weight: 400"><i><a href="reduced.html">Back to Lunar
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Prospector Reduced Spectrometer Data</a></i></strong></p>
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<h2>Introduction</h2>
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<p>These Lunar Prospector (LP) spectrometer special products contain data from
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the neutron and gamma ray spectrometers. All data
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products are provided in two formats: an ASCII table and a binary image.</p>
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<p>Each ASCII file contains header information followed by column formatted data separated
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by commas. Header records begin with a '#' character in the first column. The first four
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columns of the ASCII version contain the minimum and maximum latitude and longitude values
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for each pixels. East longitudes are
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positive. The remaining columns give the parameter value, and, if available, standard
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deviation values. The ASCII format files are named <<i>name</i>>.txt. File
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sizes of the ASCII versions vary depending of the bin size.</p>
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<p>Each binary file is formatted as an image covering the entire planet with an
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array of 720 samples and 360 lines. Data values are scaled as integers in the image array
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with two bytes per pixel in IEEE order. For all binary files except the potassium, radon, and polonium, image values are ten times the values given in the ASCII
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files. The binary files for potassium abundances have integer values that are the same
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as values given in the corresponding ASCII file. The binary files for the radon
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and polonium data have integer values that are 1000 times the values given in
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the corresponding ASCII file. The binary image is a simple cylindrical map
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projection with 0.5° pixel size. The first image line corresponds to the south pole and
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the last image line corresponds to the north pole of the moon.
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The first sample corresponds to -180° East longitude and the last sample
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corresponds to 180° East longitude. Binary file names have the form <<i>name</i>>.dat and are about
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0.5 MB in size.</p>
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<h2>Neutron Counting Rate Data Products</h2>
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<h3>Thermal Neutron Counting Rate</h3>
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<p>The thermal neutron counting rate data product contains data from the LP neutron spectrometer
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Sn and Cd covered <sup>3</sup>He detectors [Feldman
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<i>et al.</i>, 1999, 2001a]. The thermal neutron counting rate is defined as the counting rate
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difference per 32 seconds between the two detectors and corresponds to neutrons having energies
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ranging from 0 to 0.4 eV. This data
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product has been described by Feldman <i>et al.</i> [2000a] and Elphic <i>et al.</i> [2000]. A
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detailed description of the data reduction for this data
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product is given by Maurice <i>et al.</i> [2001a]. The map bin size is 60 km by 60 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/therms.txt">therms.txt</a></td>
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<td width=140>(0.74 MB file size)</td>
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<td width=140>Version: Nov. 3, 2000</td>
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</tr><tr>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/therms.dat">therms.dat</a></td>
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<td width=140>(0.51 MB file size)</td>
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<td width=140>Version: Nov. 3, 2000</td>
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</tr>
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</table>
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<h3>Epithermal Neutron Counting Rate</h3>
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<p>The epithermal neutron counting rate data product contains data from the LP neutron
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spectrometer Cd covered <sup>3</sup>He detector [Feldman
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<i>et al.</i>, 1999, 2001a]. The epithermal neutron counting rate is defined as the
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counting rate per 32 seconds from the Cd covered detector and corresponds to neutrons
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having energies ranging from 0.4 to about 100 eV. The data
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product has been described by Feldman <i>et al.</i> [2000b, 2001c] and Maurice
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<i>et al.</i> [2001b]. A detailed description of the data reduction for this data
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product is given by Maurice <i>et al.</i> [2001a]. The map bin size is 60 km by 60 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/epis.txt">epis.txt</a></td>
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<td width=140>(0.74 MB file size)</td>
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<td width=140>Version: Nov. 3, 2000</td>
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</tr><tr>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/epis.dat">epis.dat</a></td>
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<td width=140>(0.51 MB file size)</td>
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<td width=140>Version: Nov. 3, 2000</td>
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</tr>
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</table>
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<h3>Fast Neutron Counting Rate</h3>
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<p>The fast neutron counting rate data product contains data from the LP gamma ray spectrometer [Feldman
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<i>et al.</i>, 1999, 2001b]. The fast neutron counting rate is defined as the counting
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rate per 32 seconds of fast neutrons having energies from 0.6 to about 9 MeV. The data
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product has been described by Maurice <i>et al.</i> [2000]. A detailed description of the
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data reduction for this data
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product is given by Maurice <i>et al.</i> [2001a]. The map bin size is 60 km by 60 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/fast.txt">fast.txt</a></td>
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<td width=140>(0.74 MB file size)</td>
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<td width=140>Version: Nov. 3, 2000</td>
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</tr><tr>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/fast.dat">fast.dat</a></td>
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<td width=140>(0.51 MB file size)</td>
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<td width=140>Version: Nov. 3, 2000</td>
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</tr>
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</table>
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<h3>Fast Neutron Spectra Counting Rate</h3>
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<p>The fast neutron spectra counting rate data product contains data from the LP gamma ray
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spectrometer [Feldman
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<i>et al.</i>, 1999, 2001b]. The fast neutron spectra counting rate is defined as the counting
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rate per 32 seconds of fast neutrons having energies from 0.6 to about 9 MeV. These energies
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are then divided into 16 channels having midpoint energies of 0.743, 1.40, 2.09, 2.67, 3.24,
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3.75, 4.23, 4.70, 5.18, 5.65, 6.11, 6.55, 6.98, 7.41, 7.82, and 8.24 MeV. This data
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product has been described by Maurice <i>et al</i>. [2000]. A detailed description of the data
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reduction for this data
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product is given by Maurice <i>et al.</i> [2001a]. Furthermore, a description of how the counting
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rates can be converted into fluxes is given by Maurice
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<i>et al.</i> [2000] and Byrd and Urban
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[1994]. The map bin size is 60 km by 60 km. For the binary image file, the
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channels are stored in band sequential order.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/fastspectra.txt">fastspectra.txt</a></td>
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<td width=140>(4.8 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr><tr>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/fastspectra.dat">fastspectra.dat</a></td>
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<td width=140>(8.1 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr>
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</table>
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<h2>5 Degree Elemental Abundance Data Products</h2>
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<p>Elemental abundance values for O, Si, Ti, Al, Fe, Mg, Ca, U, and K were
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derived from LP gamma ray spectrometer [Feldman <i>et al.</i>, 1999]
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observations acquired during the high-altitude portion of the LP mission. For
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the elements O, Si, Ti, Al, Fe, Mg, and Ca, the data are given in units of
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elemental weight percent. For the elements U and K, the data are given in units
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of ppm. A description of the reduction of these data products is given by
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Prettyman <i>et al.</i> [2002]. The Thorium data has been calculated using full
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modeling and response function analysis [Prettyman <i>et al.,</i> 2002]. The map bin size is 150 km by 150 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td>Oxygen</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/oxygen5d.txt">
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oxygen5d.txt</a><br>
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<a href="reduced/oxygen5d.dat">oxygen5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Silicon</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/silicon5d.txt">
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silicon5d.txt</a><br>
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<a href="reduced/silicon5d.dat">silicon5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Titanium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/titanium5d.txt">
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titanium5d.txt</a><br>
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<a href="reduced/titanium5d.dat">titanium5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Aluminum</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/aluminum5d.txt">
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aluminum5d.txt</a><br>
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<a href="reduced/aluminum5d.dat">aluminum5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Iron</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/iron5d.txt">iron5d.txt</a><br>
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<a href="reduced/iron5d.dat">iron5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Magnesium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/magnesium5d.txt">
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magnesium5d.txt</a><br>
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<a href="reduced/magnesium5d.dat">magnesium5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Calcium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/calcium5d.txt">
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calcium5d.txt</a><br>
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<a href="reduced/calcium5d.dat">calcium5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Uranium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/uranium5d.txt">
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uranium5d.txt</a><br>
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<a href="reduced/uranium5d.dat">urnaium5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Potassium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/potassium5d.txt">
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potassium5d.txt</a><br>
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<a href="reduced/potassium5d.dat">potassium5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr>
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<tr>
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<td>Thorium</td>
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<td>ASCII File:<br>
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Binary Image File:</td>
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<td><a href="reduced/thorium5d.txt">
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thorium5d.txt</a><br>
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<a href="reduced/thorium5d.dat">thorium5d.dat</a></td>
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<td>(0.1 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr>
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</table>
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<h2>2 Degree Elemental Abundance Data Products</h2>
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<h3>Samarium Abundance Data Product</h3>
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<p>The samarium abundance data product contains data from the LP neutron and gamma ray
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spectrometers [Feldman
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<i>et al.</i> 1999, 2001a] taken during the low-altitude portion of the LP mission. This data
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product is given in units of microgram/gram. A detailed description of the data reduction of
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this data type is given by Elphic
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<i>et al.</i> [2000]. The map bin size is 60 km x 60 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/samarium2d.txt">samarium2d.txt</a></td>
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<td width=140>(0.61 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr><tr>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/samarium2d.dat">samarium2d.dat</a></td>
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<td width=140>(0.51 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr>
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</table>
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<h3>Titanium and Potassium Abundance Data Products</h3>
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<p>These data products contain elemental abundances values for Ti and K derived
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from LP gamma ray spectrometer [Feldman <i>et al.</i>, 1999] observations
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acquired during the high- and low-altitude portions of the LP mission. For Ti,
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the data are given in units of elemental weight percent. For K, the data are
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given in units of ppm. A description of the reduction of these data products is
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given by Prettyman <i>et al.</i> [2002]. The map bin size is 60 km by 60 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td>Titanium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/titanium2d.txt">
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titanium2d.txt</a><br>
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<a href="reduced/titanium2d.dat">titanium2d.dat</a></td>
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<td>(0.61 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr><tr>
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<td>Potassium</td>
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<td>ASCII File:<br>Binary Image File:</td>
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<td><a href="reduced/potassium2d.txt">
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potassium2d.txt</a><br>
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|
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<a href="reduced/potassium2d.dat">potassium2d.dat</a></td>
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<td>(0.61 MB file size)<br>(0.51 MB file size)</td>
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<td>Version: June 15, 2002</td>
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</tr>
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</table>
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<h3>Hydrogen Abundance Data</h3>
|
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<p>The hydrogen abundance data product contains data from the LP neutron spectrometer [Feldman
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<i>et al.</i>, 1999,
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2001a] acquired during the low-altitude portion of the LP mission. Hydrogen abundances are derived from epithermal neutron data that has been corrected by
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thermal neutron data [Feldman <i>et al.</i>, 2001c]. Equations 3 and 4 of Feldman
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<i>et al.</i> [2001c] show how
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the corrected epithermal data is converted into hydrogen abundances as parts per million (ppm).
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Note, however, that these abundances are not necessarily reliable in regions of high thorium and
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rare-earth element abundances [Maurice <i>et al.</i>, 2001a]. The map bin size is 60 km
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x 60 km.</p>
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<table border=1 cellpadding=4 cellspacing=1>
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<tr>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/hydrogenlow.txt">hydrogenlow.txt</a></td>
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<td width=140>(0.61 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr><tr>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/hydrogenlow.dat">hydrogenlow.dat</a></td>
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<td width=140>(0.51 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr>
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</table>
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<h3>Thorium Abundance Data</h3>
|
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<p>The 2 degree thorium abundance data products contains data from the LP gamma ray spectrometer [Feldman
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<i>et al.</i>,
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1999, 2001b]. These absolute abundances are given in units of microgram/gram. There are two
|
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versions containing data taken from the high- and low-altitude portions of the LP mission
|
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[Lawrence <i>et al.</i>, 2000]. These data have been described by Lawrence <i>et al.</i> [2000]. A
|
|
detailed
|
|
description of the data reduction for these data is given by Lawrence <i>et al.</i> [2001b]. The map
|
|
bin size is 60 km x 60 km.</p>
|
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|
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<table border=1 cellpadding=4 cellspacing=1>
|
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<tr>
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<td width=200>High Altitude Version</td>
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<td width=140>ASCII File:</td>
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<td width=140><a href="reduced/thoriumhigh.txt">thoriumhigh.txt</a></td>
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<td width=140>(0.74 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr><tr>
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<td width=200> </td>
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<td width=140>Binary Image File:</td>
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<td width=140><a href="reduced/thoriumhigh.dat">thoriumhigh.dat</a></td>
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<td width=140>(0.51 MB file size)</td>
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<td width=140>Version: July 6, 2001</td>
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</tr><tr>
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<td width=200>Low Altitude Version</td>
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<td width=140>ASCII File:</td>
|
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<td width=140><a href="reduced/thoriumlow.txt">thoriumlow.txt</a></td>
|
|
<td width=140>(0.74 MB file size)</td>
|
|
<td width=140>Version: July 6, 2001</td>
|
|
</tr><tr>
|
|
<td width=200> </td>
|
|
<td width=140>Binary Image File:</td>
|
|
<td width=140><a href="reduced/thoriumlow.dat">thoriumlow.dat</a></td>
|
|
<td width=140>(0.51 MB file size)</td>
|
|
<td width=140>Version: July 6, 2001</td>
|
|
</tr>
|
|
</table>
|
|
|
|
|
|
<h2>Half Degree Abundance Data Products</h2>
|
|
|
|
<h3>Thorium Abundance Data</h3>
|
|
<p>The half degree thorium abundance data product contains data from the LP
|
|
gamma ray spectrometer [Feldman <i>et al.</i>, 1999]. The absolute abundances
|
|
are given in units of ppm. These data are taken from the low-altitude portion of
|
|
the LP mission. A description of the reduction of these data products
|
|
is given by Lawrence <i>et al.</i> [2002a, 2002b]. The map bin size is 0.5° by
|
|
0.5°.</p>
|
|
|
|
<table border=1 cellpadding=4 cellspacing=1>
|
|
<tr>
|
|
<td width=140>ASCII File:</td>
|
|
<td width=140><a href="reduced/thoriumhd.txt">thoriumhd.txt</a></td>
|
|
<td width=140>(13.9 MB file size)</td>
|
|
<td width=140>Version: Jan. 3, 2002</td>
|
|
</tr><tr>
|
|
<td width=140>Binary Image File:</td>
|
|
<td width=140><a href="reduced/thoriumhd.dat">thoriumhd.dat</a></td>
|
|
<td width=140>(0.51 MB file size)</td>
|
|
<td width=140>Version: Jan. 3, 2002</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h3>Iron Abundance Data</h3>
|
|
|
|
<p>The half degree iron abundance data product contains data from the LP
|
|
gamma ray spectrometer [Feldman <i>et al.</i>, 1999] acquired during the
|
|
low-altitude portion of the LP mission. The absolute abundances are given in
|
|
units of FeO weight percent. A description of the reduction of these data products
|
|
is given by Lawrence <i>et al.</i> [2002a, 2002b]. The map bin size is 0.5° by
|
|
0.5°.</p>
|
|
|
|
<table border=1 cellpadding=4 cellspacing=1>
|
|
<tr>
|
|
<td width=140>ASCII File:</td>
|
|
<td width=140><a href="reduced/ironhd.txt">ironhd.txt</a></td>
|
|
<td width=140>(13.9 MB file size)</td>
|
|
<td width=140>Version: Jan. 3, 2002</td>
|
|
</tr><tr>
|
|
<td width=140>Binary Image File:</td>
|
|
<td width=140><a href="reduced/ironhd.dat">ironhd.dat</a></td>
|
|
<td width=140>(0.51 MB file size)</td>
|
|
<td width=140>Version: Jan. 3, 2002</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h3>Hydrogen Abundance Data</h3>
|
|
|
|
<p>The half degree hydrogen abundance data product contains data from the LP
|
|
neutron spectrometer [Feldman <i>et al.</i>, 1999]. Hydrogen abundances are
|
|
derived from epithermal neutron data that has been corrected by thermal neutron
|
|
data [Feldman <i>et al.</i>, 2001c]. Equations 3 and 4 of Feldman
|
|
<i>et al.</i> [2001c] show how
|
|
the corrected epithermal data is converted into hydrogen abundances as parts per million (ppm).
|
|
Note, however, that these abundances are not necessarily reliable in regions of high thorium and
|
|
rare-earth element abundances [Maurice <i>et al.</i>, 2001a]. The map bin size is 0.5° by
|
|
0.5°.</p>
|
|
|
|
<table border=1 cellpadding=4 cellspacing=1>
|
|
<tr>
|
|
<td width=140>ASCII File:</td>
|
|
<td width=140><a href="reduced/hydrogenhd.txt">hydrogenhd.txt</a></td>
|
|
<td width=140>(13.9 MB file size)</td>
|
|
<td width=140>Version: Jan. 3, 2002</td>
|
|
</tr><tr>
|
|
<td width=140>Binary Image File:</td>
|
|
<td width=140><a href="reduced/hydrogenhd.dat">hydrogenhd.dat</a></td>
|
|
<td width=140>(0.51 MB file size)</td>
|
|
<td width=140>Version: Jan. 3, 2002</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h2>Radon-222 and Polonium-210 Relative Count Rate Data Products</h2>
|
|
<p>Relative count rate data products for radon-222 and polonium-210 contain data
|
|
from the LP alpha particle spectrometer acquired during the high- and
|
|
low-altitude portions of the LP mission. These data are given in units of counts
|
|
per second. A description of the reduction of these data products is given by
|
|
Lawson <i>et al.</i> [2002]. The data are mapped onto equal-area pixels having
|
|
an approximate size at the equator of 300 km in the longitude direction and 450
|
|
km in the latitude direction.</p>
|
|
|
|
<table border=1 cellpadding=4 cellspacing=1>
|
|
<tr>
|
|
<td>Radon-222</td>
|
|
<td>ASCII File:<br>Binary Image File:</td>
|
|
<td><a href="reduced/radon222.txt">
|
|
radon222.txt</a><br>
|
|
|
|
<a href="reduced/radon222.dat">radon222.dat</a></td>
|
|
<td>(19 KB file size)<br>(0.51 MB file size)</td>
|
|
<td>Version: Jan. 3, 2002</td>
|
|
</tr><tr>
|
|
<td>Polonium-210</td>
|
|
<td>ASCII File:<br>Binary Image File:</td>
|
|
<td><a href="reduced/polonium210.txt">
|
|
polonium210.txt</a><br>
|
|
|
|
<a href="reduced/polonium210.dat">polonium210.dat</a></td>
|
|
<td>(19 KB file size)<br>(0.51 MB file size)</td>
|
|
<td>Version: Jan. 3, 2002</td>
|
|
</tr>
|
|
</table>
|
|
|
|
|
|
<h2>Data Product Summary</h2>
|
|
<table border=2 cellpadding=2>
|
|
<tr>
|
|
<td><b>Data Type</b></td>
|
|
<td><b>File Name</b></td>
|
|
<td><b>Bin Size</b></td>
|
|
<td><b>Units</b></td>
|
|
<td><b>Std. Dev.</b></td>
|
|
<td width=150><b>References</b></td>
|
|
</tr><tr>
|
|
<td><b>Thermal Neutrons, 2 degree</b></td>
|
|
<td><a href="reduced/therms.txt">therms.txt</a><br>
|
|
|
|
<a href="reduced/therms.dat">therms.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>Counts per 32 sec</td>
|
|
<td>Yes</td>
|
|
<td width=150>Feldman <i>et al.</i>, 1999, 2000a, 2001a; Elphic
|
|
<i>et al.</i>, 2000; Maurice <i>et al.</i>, 2001a</td>
|
|
</tr><tr>
|
|
<td><b>Epithermal Neutrons, 2 degree</b></td>
|
|
<td><a href="reduced/epis.txt">epis.txt</a><br>
|
|
|
|
<a href="reduced/epis.dat">epis.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>Counts per 32 sec</td>
|
|
<td>Yes</td>
|
|
<td width=150>Feldman <i>et al.</i>, 1999, 2000b, 2001a, 2001c; Maurice
|
|
<i>et al.</i>,
|
|
2000, 2001a</td>
|
|
</tr><tr>
|
|
<td><b>Fast Neutrons, 2 degree</b></td>
|
|
<td><a href="reduced/fast.txt">fast.txt</a><br>
|
|
|
|
<a href="reduced/fast.dat">fast.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>Counts per 32 sec</td>
|
|
<td>Yes</td>
|
|
<td width=150>Feldman <i>et al.</i>, 1999, 2001b; Maurice <i>et al.</i>, 2000, 2001a</td>
|
|
</tr><tr>
|
|
<td><b>Fast Neutron Spectra, 2 degree</b></td>
|
|
<td><a href="reduced/fastspectra.txt">fastspectra.txt</a><br>
|
|
|
|
<a href="reduced/fastspectra.dat">fastspectra.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>Counts per 32 sec</td>
|
|
<td>Yes</td>
|
|
<td width=150>Maurice <i>et al.</i>, 2000, 2001b</td>
|
|
</tr><tr>
|
|
<td><b>Aluminum, 5 degree</b></td>
|
|
<td><a href="reduced/aluminum5d.txt">aluminum5d.txt</a><br>
|
|
|
|
<a href="reduced/aluminum5d.dat">aluminum5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>Al wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Calcium, 5 degree</b></td>
|
|
<td><a href="reduced/calcium5d.txt">calcium5d.txt</a><br>
|
|
|
|
<a href="reduced/calcium5d.dat">calcium5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>Ca wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Hydrogen, 2 degree</b></td>
|
|
<td><a href="reduced/hydrogenlow.txt">hydrogenlow.txt</a><br>
|
|
|
|
<a href="reduced/hydrogenlow.dat">hydrogenlow.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Feldman <i>et al.</i>, 2001c</td>
|
|
</tr><tr>
|
|
<td><b>Hydrogen, half degree</b></td>
|
|
<td><a href="reduced/hydrogenhd.txt">hydrogenhd.txt</a><br>
|
|
|
|
<a href="reduced/hydrogenhd.dat">hydrogenhd.dat</a></td>
|
|
<td>0.5° x 0.5°</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Feldman <i>et al.</i>, 2001c</td>
|
|
</tr><tr>
|
|
<td><b>Iron, 5 degree</b></td>
|
|
<td><a href="reduced/iron5d.txt">iron5d.txt</a><br>
|
|
|
|
<a href="reduced/iron5d.dat">iron5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>Fe wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Iron, half degree</b></td>
|
|
<td><a href="reduced/ironhd.txt">ironhd.txt</a><br>
|
|
|
|
<a href="reduced/ironhd.dat">ironhd.dat</a></td>
|
|
<td>0.5° x 0.5°</td>
|
|
<td>FeO wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Lawrence <i>et al.</i>, 2001c</td>
|
|
</tr><tr>
|
|
<td><b>Magnesium, 5 degree</b></td>
|
|
<td><a href="reduced/magnesium5d.txt">magnesium5d.txt</a><br>
|
|
|
|
<a href="reduced/magnesium5d.dat">magnesium5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>Mg wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Oxygen, 5 degree</b></td>
|
|
<td><a href="reduced/oxygen5d.txt">oxygen5d.txt</a><br>
|
|
|
|
<a href="reduced/oxygen5d.dat">oxygen5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>O wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Polonium-210</b></td>
|
|
<td><a href="reduced/polonium210.txt">polonium210.txt</a><br>
|
|
|
|
<a href="reduced/polonium210.dat">polonium210.dat</a></td>
|
|
<td>300km lon. x 450km lat.</td>
|
|
<td>Counts per sec</td>
|
|
<td>No</td>
|
|
<td width=150>Lawson <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Potassium, 5 degree</b></td>
|
|
<td><a href="reduced/potassium5d.txt">potassium5d.txt</a><br>
|
|
|
|
<a href="reduced/potassium5d.dat">potassium5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Potassium, 2 degree</b></td>
|
|
<td><a href="reduced/potassium2d.txt">potassium2d.txt</a><br>
|
|
|
|
<a href="reduced/potassium2d.dat">potassium2d.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Radon-222</b></td>
|
|
<td><a href="reduced/radon222.txt">radon222.txt</a><br>
|
|
|
|
<a href="reduced/radon222.dat">radon222.dat</a></td>
|
|
<td>300km lon. x 450km lat.</td>
|
|
<td>Counts per sec</td>
|
|
<td>No</td>
|
|
<td width=150>Lawson <i>et al., 2002</i></td>
|
|
</tr><tr>
|
|
<td><b>Samarium, 2 degree</b></td>
|
|
<td><a href="reduced/samarium2d.txt">samarium2d.txt</a><br>
|
|
|
|
<a href="reduced/samarium2d.dat">samarium2d.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>μg/g</td>
|
|
<td>No</td>
|
|
<td width=150>Elphic <i>et al.</i>, 2000</td>
|
|
</tr><tr>
|
|
<td><b>Silicon, 5 degree</b></td>
|
|
<td><a href="reduced/silicon5d.txt">silicon5d.txt</a><br>
|
|
|
|
<a href="reduced/silicon5d.dat">silicon5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>Si wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Thorium, high-altitude</b></td>
|
|
<td><a href="reduced/thoriumhigh.txt">thoriumhigh.txt<br>
|
|
|
|
</a><a href="reduced/thoriumhigh.dat">thoriumhigh.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>μg/g</td>
|
|
<td>Yes</td>
|
|
<td width=150>Lawrence <i>et al.</i>, 2000</td>
|
|
</tr><tr>
|
|
<td><b>Thorium, low-altitude</b></td>
|
|
<td><a href="reduced/thoriumlow.txt">thoriumlow.txt<br>
|
|
|
|
</a><a href="reduced/thoriumlow.dat">thoriumlow.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>μg/g</td>
|
|
<td>Yes</td>
|
|
<td width=150>Lawrence <i>et al.</i>, 2000</td>
|
|
</tr><tr>
|
|
<td><b>Thorium, half degree</b></td>
|
|
<td><a href="reduced/thoriumhd.txt">thoriumhd.txt</a><br>
|
|
|
|
<a href="reduced/thoriumhd.dat">thoriumhd.dat</a></td>
|
|
<td>0.5° x 0.5°</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Lawrence <i>et al.</i>, 2002a, 2002b</td>
|
|
</tr><tr>
|
|
<td><b>Thorium, 5 degree</b></td>
|
|
<td><a href="reduced/thorium5d.txt">thorium5d.txt</a><br>
|
|
|
|
<a href="reduced/thorium5d.dat">thorium5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Titanium, 5 degree</b></td>
|
|
<td><a href="reduced/titanium5d.txt">titanium5d.txt</a><br>
|
|
|
|
<a href="reduced/uranium5d.dat">titanium5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>Ti wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Titanium, 2 degree</b></td>
|
|
<td><a href="reduced/titanium2d.txt">titanium2d.txt</a><br>
|
|
|
|
<a href="reduced/titanium2d.dat">titanium2d.dat</a></td>
|
|
<td>60km x 60km</td>
|
|
<td>Ti wt. %</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr><tr>
|
|
<td><b>Uranium, 5 degree</b></td>
|
|
<td><a href="reduced/uranium5d.txt">uranium5d.txt</a><br>
|
|
|
|
<a href="reduced/uranium5d.dat">uranium5d.dat</a></td>
|
|
<td>150km x 150km</td>
|
|
<td>ppm</td>
|
|
<td>No</td>
|
|
<td width=150>Prettyman <i>et al.</i>, 2002</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h2>References</h2>
|
|
|
|
<p>(<i>Contact <a href="mailto:djlawrence@lanl.gov">David Lawrence</a> of Los
|
|
Alamos National Laboratory for information on references that are in preparation
|
|
or in press</i>).</p>
|
|
|
|
<p>Byrd, R. C., and W. T. Urban, Calculation of the neutron response of
|
|
Boron-loaded scintillators, LAUR-12833-MS, Los Alamos, National Laboratory, Los
|
|
Alamos, NM, 1994.</p>
|
|
<p>Elphic, R. C., D. J. Lawrence, W. C. Feldman, B. L. Barraclough, S. Maurice,
|
|
A. B. Binder, and P. G. Lucey, Determination of lunar global rare earth element
|
|
abundances using Lunar Prospector neutron spectrometer observations, <i>J. Geophys.
|
|
Res., 105</i>, 20,333-20,346, 2000.</p>
|
|
<p>Feldman W. C., B. L. Barraclough, K. R. Fuller, D. J. Lawrence, S. Maurice,
|
|
M. C. Miller, T. H. Prettyman, and A. B. Binder, the Lunar Prospector Gamma-Ray
|
|
and Neutron Spectrometers, <i>Nuclear Instruments and Methods in Physics Research
|
|
A, 422</i>, 562-566, 1999.</p>
|
|
<p>Feldman, W. C., D. J. Lawrence, R. C. Elphic, D. T. Vaniman, D. R. Thomsen,
|
|
B. L. Barraclough, S. Maurice, and A. B. Binder, The chemical information
|
|
content of lunar thermal and epithermal neutrons, <i>J. Geophys. Res., 105</i>,
|
|
20,347-20,363, 2000a.</p>
|
|
<p>Feldman, W. C., D. J. Lawrence, R. C. Elphic, B. L. Barraclough, S. Maurice,
|
|
I. Genetay, and A. B. Binder, Polar hydrogen deposits on the Moon, <i>J. Geophys.
|
|
Res., 105</i>, 4175-4195, 2000b.</p>
|
|
<p>Feldman, W. C., et al., Instrument description of the Lunar Prospector
|
|
Neutron Spectrometer, in preparation, 2001a.</p>
|
|
<p>Feldman, W. C., et al., Instrument description of the Lunar Prospector
|
|
Gamma-ray Spectrometer, in preparation, 2001b.</p>
|
|
<p>Feldman, W. C., S. Maurice, D. J. Lawrence, R. C. Little, S. L. Lawson, O.
|
|
Gasnault, R. C. Wiens, B. L. Barraclough, R. C. Elphic, T. H. Prettyman, J. T.
|
|
Steinberg, and A. B. Binder, Evidence for water ice near lunar poles, <i>J. Geophys.
|
|
Res.</i>, in press, 2001c.</p>
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<p>Lawrence, D. J., W. C. Feldman, B. L. Barraclough, R. C. Elphic, T. H.
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Prettyman, S. Maurice, A. B. Binder, and M. C. Miller, Thorium abundances on the
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lunar surface, <i>J. Geophys. Res., 105</i>, 20,307-20,331, 2000.</p>
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<p>Lawrence, D. J., W. C. Feldman, R. C. Elphic, S. Maurice, T. H. Prettyman,
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and A. B. Binder, Iron abundances on the lunar surface as measured by the
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Lunar Prospector Gamma-Ray Spectrometer, <i>32nd Lunar and Planetary Science
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Conference, Abstract #1830</i>, 2001a.</p>
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<p>Lawrence D. J., et al., Data reduction procedures for the Lunar Prospector
|
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Gamma-ray Spectrometer, in preparation, 2001b.</p>
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<p>Lawrence, D. J., W. C. Feldman, R. C. Elphic, R. C. Little, T. H. Prettyman,
|
|
S. Maurice, P. G. Lucey, and A. B. Binder, Iron abundances on the lunar surface
|
|
as measured by the Lunar Prospector Gamma-Ray and Neutron Spectrometers, <i>J.
|
|
Geophys. Res.</i>, submitted, 2001c.</p>
|
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<p>Lawrence, D. J., R. C. Elphic, W. C. Feldman, O. Gasnault, I. Genetay, S.
|
|
Maurice, and T. H. Prettyman, Optimizing the spatial resolution for gamma-ray
|
|
measurements of thorium abundances on the lunar surface, <i>New Views of the
|
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Moon, Europe</i>, 12-14 Jan., 2002a.</p>
|
|
<p>Lawrence, D. J., R. C. Elphic, W. C. Feldman, O. Gasnault, I. Genetay, S.
|
|
Maurice, and T. H. Prettyman, Small-area thorium enhancements on the lunar
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surface, <i>33rd Lunar and Planetary Science Conference, Abstract #1970</i>,
|
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2002b</p>
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<p>Lawson, S. L., W. C. Feldman, D. J. Lawrence, K. R. Moore, S. Maurice, R. D.
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Belian, and A. B. Binder, Maps of lunar radon-222 and polonium-210, <i>33rd
|
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Lunar and Planetary Science Conference, Abstract #1835</i>, 2002.</p>
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<p>Maurice, S., W. C. Feldman, D. J. Lawrence, O. Gasnault, C. d'Uston, and P.
|
|
G. Lucey, High-energy neutrons from the Moon, <i>J. Geophys. Res., 105</i>,
|
|
20,365-20,375, 2000.</p>
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<p>Maurice, S., et al., Data reduction procedures for the Lunar Prospector
|
|
Neutron Spectrometer, in preparation, 2001a.</p>
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<p>Maurice, S., R. C. Elphic, W. C. Feldman, R. Little, D. J. Lawrence, I.
|
|
Genetay, C. d'Uston, O. Gasnault, S. Chevrel, and A. B. Binder, Rare-earth
|
|
elements on the Moon from epithermal neutrons, <i>J. Geophys. Res.</i>, submitted,
|
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2001b.</p>
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<p>Prettyman, T. H., W. C. Feldman, D. J. Lawrence, G. W. McKinney, A. B.
|
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Binder, R. C. Elphic, O. M. Gasnault, S. Maurice, and K. R. Moore, Library least
|
|
squares analysis of Lunar Prospector gamma-ray spectra, <i>33rd Lunar and
|
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Planetary Science Conference, Abstract #2012</i>, 2002.</p>
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