Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Larry G. Evans"'
Autor:
R. Z. Sagdeev, Gordon Chin, Jao-Jang Su, R. D. Starr, A. B. Sanin, Larry G. Evans, K. Harshman, T. P. McClanahan, M. L. Litvak, J.G. Bodnarik, William V. Boynton, Timothy A. Livengood, I. G. Mitrofanov
Publikováno v:
Planetary and Space Science. 162:89-104
Neutron flux measurements by the Lunar Exploration Neutron Detector (LEND) on the Lunar Reconnaissance Orbiter (LRO) enable quantifying hydrogen-bearing volatiles in the lunar surface from orbit. Accurately determining hydrogen abundance requires dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2788af648876cf605d7992ac61d54cc3
https://doi.org/10.1016/j.pss.2017.12.004
https://doi.org/10.1016/j.pss.2017.12.004
Autor:
Larry G. Evans, Francis M. McCubbin, Timothy J. McCoy, Kathleen E. Vander Kaaden, Aaron S. Bell, Stephen M. Elardo, Larry R. Nittler, Lindsay P. Keller, Patrick N. Peplowski, Jeremy W. Boyce
Publikováno v:
Journal of Geophysical Research: Planets. 122:2053-2076
Data from the Gamma-Ray Spectrometer (GRS) that flew on the MESSENGER spacecraft indicate that the O/Si weight ratio of Mercury's surface is 1.2 ± 0.1. This value is lower than any other celestial surface that has been measured by GRS and suggests t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a415e109a78f2189111640372e7e51e
https://doi.org/10.1002/2017je005367
https://doi.org/10.1002/2017je005367
Autor:
R. D. Starr, Sean C. Solomon, John O. Goldsten, Edgar A. Rhodes, Patrick N. Peplowski, Larry G. Evans
Publikováno v:
Icarus. 288:186-200
The MESSENGER spacecraft carried a suite of geochemical remote-sensing devices that included a Gamma-Ray Spectrometer (GRS). The GRS underwent an extensive series of tests and calibrations prior to launch in order to characterize the response of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2b89975508d163d35251298d3feafaa
https://doi.org/10.1016/j.icarus.2017.01.022
https://doi.org/10.1016/j.icarus.2017.01.022
Autor:
Gordon Chin, K. Harshman, Alexey Malakhov, Dmitry Golovin, Larry G. Evans, William V. Boynton, A. B. Sanin, Maxim Mokrousov, F. Fedosov, Timothy A. Livengood, A. S. Kozyrev, J.G. Bodnarik, I. G. Mitrofanov, R. Z. Sagdeev, B. N. Bakhtin, Maxim Litvak, T. P. McClanahan, Andrey Vostrukhin, Vladislav Tretyakov, R. D. Starr
Publikováno v:
Icarus. 283:20-30
We present a method of conversion of the lunar neutron counting rate measured by the Lunar Reconnaissance Orbiter (LRO) Lunar Exploration Neutron Detector (LEND) instrument collimated neutron detectors, to water equivalent hydrogen (WEH) in the top
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41741ff8a7a34698a8bb0ed65ba3bfce
https://doi.org/10.1016/j.icarus.2016.06.002
https://doi.org/10.1016/j.icarus.2016.06.002
Autor:
Jeffrey E. Moersch, Suniti Karunatillake, T. P. McClanahan, Larry G. Evans, A. M. Parsons, S. Nowicki, Jeffrey Schweitzer, Christopher G. Tate, R. D. Starr
Publikováno v:
Earth and Space Science. 4:76-90
The Probing In situ with Neutrons and Gamma rays (PING) instrument is an innovative application of active neutron-induced gamma-ray technology. The objective of PING is to measure the elemental composition of the Martian regolith. As part 2 of a two-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81bb79929934a0a6b641f2250967e7c8
https://doi.org/10.1002/2016ea000162
https://doi.org/10.1002/2016ea000162
Autor:
I. G. Mitrofanov, Maxim Mokrousov, R. Z. Sagdeev, Т.P. McClanahan, M. L. Litvak, T. A. Livengood, A. V. Malakhov, R. D. Starr, B. N. Bakhtin, Larry G. Evans, K. Harshman, J.G. Bodnarik, A. B. Sanin, William V. Boynton, Gordon Chin
Publikováno v:
Planetary and Space Science. 122:53-65
Lunar neutron flux data measured by the Lunar Exploration Neutron Detector (LEND) on board NASA's Lunar Reconnaissance Orbiter (LRO) were analyzed for the period 2009-2014.We have re-evaluated the instrument's collimation capability and re-estimated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcf29cd430f1d2a25025ab5669d662a1
https://doi.org/10.1016/j.pss.2016.01.006
https://doi.org/10.1016/j.pss.2016.01.006
Autor:
Francis M. McCubbin, R. D. Starr, Timothy J. McCoy, Larry R. Nittler, Patrick N. Peplowski, Sean C. Solomon, Larry G. Evans, Mikhail Yu. Zolotov, Shoshana Z. Weider, Denton S. Ebel, David J. Lawrence
Publikováno v:
Icarus. 257:417-427
Orbital measurements obtained by the MESSENGER Gamma-Ray Spectrometer have been analyzed to determine the surface abundance of chlorine in Mercury’s northern hemisphere. The derived Cl/Si mass ratio is 0.0057 ± 0.001, which for an assumed Si abund
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7e337d9ee3ad7ba3990895bac26c3b7
https://doi.org/10.1016/j.icarus.2015.04.039
https://doi.org/10.1016/j.icarus.2015.04.039
Autor:
A. B. Sanin, T. P. McClanahan, M. L. Litvak, A. M. Parsons, G. M. Milikh, J.G. Bodnarik, T. A. Livengood, William V. Boynton, A. V. Malakhov, K. Harshman, Jao-Jang Su, Erwan Mazarico, Dmitry Golovin, D. K. Hamara, R. D. Starr, G. Nandikotkur, Gordon Chin, Larry G. Evans, R. Z. Sagdeev, G. Droege, I. G. Mitrofanov, J. Murray
Publikováno v:
Icarus. 255:88-99
The Lunar Exploration Neutron Detector (LEND) onboard the Lunar Reconnaissance Orbiter (LRO) detects a widespread suppression of the epithermal neutron leakage flux that is coincident with the pole-facing slopes (PFS) of the Moon’s southern hemisph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15fccf462640e706468826d1df00ac4d
Autor:
Patrick N. Peplowski, James W. Head, William C. Feldman, Larry G. Evans, Larry R. Nittler, Sean C. Solomon, Shoshana Z. Weider, John O. Goldsten, David Bazell, David J. Lawrence
Publikováno v:
Icarus. 253:346-363
The first map of variations in the abundances of thermal-neutron-absorbing elements across Mercury’s surface has been derived from measurements made with the anti-coincidence shield on MESSENGER’s Gamma-Ray Spectrometer (GRS). The results, which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c34cd97143dd713c3140b0760068435
https://doi.org/10.1016/j.icarus.2015.02.002
https://doi.org/10.1016/j.icarus.2015.02.002
Autor:
John O. Goldsten, Larry R. Nittler, Patrick N. Peplowski, David T. Blewett, R. D. Starr, Sean C. Solomon, Shoshana Z. Weider, Rachel L. Klima, Timothy J. McCoy, Scott L. Murchie, David J. Lawrence, Larry G. Evans
Publikováno v:
Planetary and Space Science. 108:98-107
Mercury׳s low surface reflectance and the low surface abundances of iron and titanium have led to the suggestion that carbon (C) may serve as the dominant darkening agent on Mercury׳s surface. Estimates of the amount of carbon required to achieve t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd5a2eb6cb1f212b56785b036119498a
https://doi.org/10.1016/j.pss.2015.01.008
https://doi.org/10.1016/j.pss.2015.01.008