Technical comment on "Hydrogen mapping of the lunar South Pole using the LRO neutron detector experiment LEND".
نویسندگان
چکیده
Based on a study of high-energy epithermal (HEE) neutrons in data from the Lunar Exploration Neutron Detector (LEND) on NASA's Lunar Reconnaissance Orbiter (LRO), the background from HEE neutrons is larger than initially estimated. Claims by Mitrofanov et al. (Reports, 22 October 2010, p. 483) of enhanced hydrogen abundance in sunlit portions of the lunar south pole and quantitative hydrogen concentration values in south pole permanently shaded regions are therefore insufficiently supported.
منابع مشابه
Supporting Online Material for Hydrogen Mapping of the Lunar South Pole Using the LRO Neutron Detector Experiment LEND
متن کامل
Image Restoration of Lunar Neutron Albedo Maps for the Lunar Explora- Tion Neutron Detector (lend)
Introduction: The Lunar Exploration Neutron Detector (LEND) onboard the Lunar Reconnaissance Orbiter (LRO) will measure the flux of neutrons from the Moon, which are produced by the continuous and isotropic cosmic ray bombardment of the lunar surface. When cosmic rays hit the regolith, they release high-energy neutrons that are then slowed down and absorbed by the nuclei of elements in the rego...
متن کاملMoonshine: Diurnally varying hydration through natural distillation on the Moon, detected by the Lunar Exploration Neutron Detector (LEND)
The Lunar Exploration Neutron Detector (LEND), on the polar-orbiting Lunar Reconnaissance Orbiter (LRO) spacecraft, has detected suppression in the Moon's naturally-occurring epithermal neutron leakage flux that is consistent with the presence of diurnally varying quantities of hydrogen in the regolith near the equator. Peak hydrogen concentration (neutron flux suppression) is on the dayside of...
متن کاملThe Importance of Lro Observations to the Lcross Mission
The LCROSS Mission: LCROSS, the Lunar CRater Observation and Sensing Satellite, will be launched on the same rocket as the Lunar Reconnaissance Orbiter (LRO) later this year (http://lcross.arc.nasa.gov). The LCROSS scientific objectives are: (1) Confirm the presence or absence of water ice in a permanently shadowed region on the Moon. (2) Identify the form/state of hydrogen observed by at the l...
متن کاملComparison of image restoration methods for lunar epithermal neutron emission mapping
Orbital measurements of neu tro ns by the Lunar Explori ng Neutron Detector (LEN D) onboard the Lunar Reconnaissance Orbiter are being used to quantify the spatial dis tribution of near surface hydrogen (H). In fe rred H concentration maps have low signal-to-noise (SN) and image restoration (IR) techniques are being studied to enhance results. A single-blind. two-phase study is described in whi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 330 6003 شماره
صفحات -
تاریخ انتشار 2010