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1 edition of Comparative analysis of selected radiation effects in Medium Earth Orbits found in the catalog.

Comparative analysis of selected radiation effects in Medium Earth Orbits

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Published by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English


About the Edition

Satellite design is well developed for the common Low Earth Orbit (LEO) and Geosynchronous Orbit (GEO) and Highly Elliptical Orbits (HEO), i.e., Molniya, cases; Medium Earth Orbit (MEO) satellite design is a relatively new venture. MEO is roughly defined as being altitudes above LEO and below GEO. A primary concern, and a major reason for the delay in exploiting the MEO altitudes, has been the expected radiation environment and corresponding satellite degradation anticipated to occur at MEO altitudes. The presence of the Van Allen belts, a major source of radiation, along with the suitability of GEO and LEO orbits, has conventionally discouraged satellite placement in MEO. As conventional Earth orbits become increasingly crowded, MEO will become further populated. This thesis investigates the major sources of radiation (geomagnetically trapped particles, solar particle events and galactic cosmic radiation) with respect to specific Naval Research Laboratory (NRL) designated MEO (altitudes between 3,000 nautical miles (nmi) and 9,000 nmi; inclination angle of 15 degrees). The contribution of each of these components to the total radiation experienced in MEO and the effects of the expected radiation on a representative spacecraft are analyzed in comparison to a baseline LEO orbit of 400 nmi and 70 degrees inclination. Dose depth curves are calculated for several configurations, and show that weight gains from necessary expected shielding are not extreme. The radiation effects considered include proton displacement dose and solar cell degradation.

Edition Notes

StatementJennifer A. Bolin
ContributionsNaval Postgraduate School (U.S.)
The Physical Object
Paginationxii, 141 p. ;
Number of Pages141
ID Numbers
Open LibraryOL25295210M

  In this paper we use a meta-analysis to examine the relationship between radiation and mutation rates in Chernobyl across 45 published studies, covering 30 Cited by:


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Comparative analysis of selected radiation effects in Medium Earth Orbits by Jennifer A. Bolin Download PDF EPUB FB2

Comparative Analysis of Selected Radiation Effects in Medium Earth Orbits [Jennifer A. Bolin] on *FREE* shipping on qualifying offers. This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon and made available for public release.

It has been reproduced in the best form available to the Pentagon. It is not spiral-boundAuthor: Jennifer A. Bolin. Medium Earth Orbit (MEO) region: the region of space from km to 35, km.

Geosynchronous Orbit (GEO) region: the region of space f km to 35, km (GEO +/- km). Since most Earth satellites are in non-circular orbits, the populations of these regions are normally described in oneFile Size: 1MB.

radiation belt of the Earth." 3. Single event effects due to high-energy (> 10 MeV) protons and heavier ions generated, for example, in solar flares and in coronal mass ejection (CME) shock fronts." 4.

Total dosage effects caused by cumulative. orbits such as Low Earth Orbit (LEO), Medium Earth Orbit (MEO), Geo-stationary (GEO) and predict the effect of this radiation environment suc h as total radiation dose, spacecraft charging. Defense Technical Information Center Sitemap Streamlining Notice.

All Collections - Search all of the collections listed below at once. Technical Reports - Scientific and technical (S&T) reports conveying results of Defense-sponsored research, development, test and evaluation (RDT&E) efforts on a wide range of topics.

Collection includes both citations and many full-text. Space radiation dosimetry presents one of the greatest challenges in the discipline of radiation protection. This is a result of both the highly complex nature of the radiation fields encountered in low-Earth orbit (LEO) and interplanetary space and of the constraints imposed by spaceflight on instrument by: Space Radiation Environment.

GSFC's experts in this area are E.G. Stassinopoulos & Janet Barth in the Radiation Physics Office, NASA/GSFC. Please check out the Radiation Physics Office Home Page. The following was taken from the SEECA (Single Event Effects Criticality Analysis).

The main sources of energetic particles that are of concern to spacecraft designers are. Human spaceflight capability was first developed during the Cold War between the United States and the Soviet Union (USSR), which developed the first intercontinental ballistic missile rockets to deliver nuclear rockets were large enough to be adapted to carry the first artificial satellites into low Earth the first satellites were launched in andthe US.

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Low-inclination, low altitude Earth orbits (LEO) are of increasing importance for astrophysical satellites, due to their low background environment. Here, the South Atlantic Anomaly (SAA) is the region with the highest amount of radiation.

We study the radiation environment in a LEO ( km altitude, 4 degrees inclination) through the particle Cited by: 8. Highlights In this study we model the space radiation environment outside the Earth's magnetosphere. We use GEANT4 and GRAS to study the radiation effects in two different types of structures.

We find that inflatable structures composed of non-metallic materials are less resistant to the different types of radiation. Interplanetary exploration will be challenging due to Cited by: This project aims to analyze space radiation effects on the electronic components of WikiSat, the femto-satellite developed at EETAC.

We present a further development of the project presented by Laia Molas Pous, in which radiation effects on electronic components at 28º inclination Low Energy Orbits (LEO) were considered.

In this case we study a similar altitude range but focus Author: Esther Bermejo Dalmau. Biological Effects of Cosmic Radiation in Low-Earth Orbit Article in International Journal of Modern Physics A 17(12n13) May with 59 Reads How we measure 'reads'Author: Marco Durante.

United States. Air Force (Contract FAC) Energetic proton flux maps of the differential flux intensity in the medium-Earth orbit (MEO) regime (altitudes ~km) are developed from measurements taken by detectors aboard the Combined Release and Radiation Effects Satellite (CRRES), HEO-F1, HEO-F3 and ICO : Gregory P.

Ginet, Stuart L. Huston, C. Roth, T. Paul O'Brien, Timothy B. Guild. The Radiation Effects and Analysis Group (REAG) consists of a small core of civil servants aided by industrial support contractors. The REAG performs testing & analysis investigating the effects of radiation on electronics & photonics.

A brief summary of these effects is available. This Home Page is here for electronics designers, project. [1] In the current study we perform a comparative analysis of the gyroresonant interactions of whistler mode waves with radiation belt electrons in the magnetospheres of Earth, Jupiter, and Saturn.

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This process is typical of the application of the scientific method to study remote objects. Calculation of Radiation Exposure Levels in Low Earth Orbit and Beyond.

Daniel Matthiä, Alankrita Mrigakshi, Thomas Berger, and “Analysis of a Radiation Model of the Shuttle Space Suit” - Moon soil: 10m ”, Elsevier, ISBN 0- () Radiation exposure on the lunar surface.

Reitz, T. Berger, D. Matthiae File Size: 4MB. The Earth’s magnetic field is offset and tilted from the Earth’s axis of rotation. Thus, the radiation belts, centered on the magnetic field, are also not centered on the Earth axis of rotation.

The region where the radiation belts are closest to the Earth’s surface, near The space radiation environment: an introduction. Schimmerling W. The Light Flash phenomenon is only one effect that is caused by cosmic rays in Earth Orbit or in the Solar System.

Our planet with its atmosphere and its magnetic field shields us from cosmic rays and their dangerous effects. Earth magnetic field offers a partial protection from cosmic radiation to astronauts in Low Earth Orbit (LEO) during Shuttle or ISS missions. Abstract. In the practice of analytical electron microscopy, particularly at near-atomic resolution, one is forced by the exigencies of statistics and the briefness of the encounter between fast electrons and the specimen, to use upwards of 10 4 electrons per Å 2 in order to acquire information about the identity and position of a single atom (see Sec.

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Galactic cosmic radiation emanates from outside the solar system, while occasionally a disturbance in the sun’s atmosphere leads to a surge in radiation particles. Protection is provided by the sun’s magnetic field, the. • Space radiation health risks include carcinogenesis, CNS, degenerative tissue and acute radiation • Accurate assessment of health risks from space radiation exposure is a highly complex task • Both physical and biological countermeasures are non-trivial issues • The JSC Biophysics Laboratory provides operational.

From AGU highlights, interesting, but readers should note that this is one point on Earth in Chile, not a summation of the atmospheric absorption, emission, and transmission of infrared radiation for the entire globe. For first time, entire thermal infrared spectrum observed.

The driving mechanism of the greenhouse effect, and the underpinning of modern. The results of our research of current radiation levels around Japan’s Fukushimadaiichi nuclear plant leads us to several conclusions about the effects on people who receive contact with nuclear radiation.

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• Past 15 years, more advanced active instruments have been introduced which provide time-resolved measurements, some information about the physical properties of the radiation, and in some cases improved directionality Size: 1MB. Soil moisture is a key variable in Earth systems, controlling the exchange of water and energy between land and atmosphere.

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Title: Sources and Effects of Ionizing Radiation: Sources Report of the session, United Nations Scientific Committee on the Effects of Atomic Radiation Report to the General Assembly Volume 1 of Sources and Effects of Ionizing Radiation: UNSCEAR Report to the General Assembly, with Scientific Annexes, United Nations.

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Credit: NASA "When I started in space sciences, we didn’t even look at such energetic particles, as we were not sure that we could trust observations at these energies," said Dmitry Subottin, a co-author on the paper at UCLA. The radiation environment in low-Earth orbit is a complex mixture of galactic cosmic radiation, particles of trapped belts and secondary particles generated in both the spacecraft and Earth's atmosphere.

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