Fast neutron flux spectrum aboard Mars Odyssey during cruise
نویسندگان
چکیده
منابع مشابه
Norovirus challenges aboard cruise ships.
Being in a ship is like being in jail, with the chance of being drowned (Dr. Samuel Johnson) Gastroenteritis is a major health concern aboard cruise ships [1]. Poor sanitation systems and contaminated water and food used to get the blame. As the North American market covers 2/3 of the global cruise volume [2], the U.S. Centers for Disease Control and Prevention (CDC) were particularly intereste...
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We analyze the flux of epithermal neutrons from the Martian surface recorded by the Russian HighEnergy Neutron Detector (HEND) from February 19 through December 19, 2002. The HEND was installed onboard the NASA 2001 Mars Odyssey spacecraft and is designed to measure neutron fluxes with energies above 1 eV. Over the period of observations, statistically significant variations in the flux of epit...
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After 55 days of mapping by the High Energy Neutron Detector onboard Mars Odyssey, we found deficits of high-energy neutrons in the southern highlands and northern lowlands of Mars. These deficits indicate that hydrogen is concentrated in the subsurface. Modeling suggests that water ice-rich layers that are tens of centimeters in thickness provide one possible fit to the data.
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[1] Mars Global Surveyor and Mars Odyssey accelerometer measurements of martian upper atmospheric densities reveal the large-scale and small-scale structure of the thermosphere in unprecedented detail. Meridional density gradients, which are seasonally dependent, are greater on the dayside than the nightside, indicating stronger meridional winds on the dayside. Density scale heights do not vary...
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The study carried out aboard a cruise ship in the years 1993-1998 involved ship passengers of various nationalities including 3872 Germans aged 23-94 years and 1281 Americans aged 25-94 years. Both nationality groups were divided into two age subgroups: till 64, and 65-94 years. The German younger age subgroup (mean age 53.2 years) consisted of 59% of the passengers, whereas the 65-94 years sub...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2002
ISSN: 0148-0227
DOI: 10.1029/2001ja000295