1 edition of Comparative analysis of selected radiation effects in Medium Earth Orbits found in the catalog.
1997 by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English
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.
|Statement||Jennifer A. Bolin|
|Contributions||Naval Postgraduate School (U.S.)|
|The Physical Object|
|Pagination||xii, 141 p. ;|
|Number of Pages||141|
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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.
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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.
Learn radiation effects earth's with free interactive flashcards. Choose from different sets of radiation effects earth's flashcards on Quizlet. Research on 11, people in more than 3, places in 14 countries. The detailed records of harmful effects on Health including Cancer, Allergies, Arthritis, Insomnia, Learning Disabilities, and many other Diseases This book is the classic record of the identification and location of energies from the earth which are noxious to human beings and others/5(4).
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.  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.
Our primary goal is to evaluate the effect of resonant wave‐particle interactions with chorus waves and determine whether chorus waves can produce net Cited by: The Sun is the closest that is directly visible is a yellowish surface layer, the r, astronomers have pieced together information from a variety of observations to make a detailed model of the structure, composition, and energy source of the Sun.
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.
).Cited by: Start studying Chapter Stochastic Effects of Radiation. Learn vocabulary, terms, and more with flashcards, games, and other study tools. commercial aviation.
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.
We posted the analysis earlier along with your data. Below, are the conclusions we came to based on the data we collected from TEPCO and.
The Radiation Effects and High Energy Density Science Research Foundation seeks to advance science and engineering in the areas of radiation effects sciences, high energy density science, and pulsed-power science and technology to address critical national security issues. Why. radiation protection monitoring of radiation protection workers.
• 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.
Thus, understanding its spatiotemporal distribution and variability is important. Environment and Climate Change Canada (ECCC) has developed a new land surface parameterization, named the Soil, Vegetation, and Snow (SVS) by: 2.
Teach Astronomy - 47 Tucanae, as imaged with the Hubble Space TelescopeOne of the most spectacular sights through a small telescope is a globular star cluster. Globular clusters are much more massive, more tightly packed, and more symmetrical. Radiation safety standards are based on knowledge of radiation effects and on established principles of radiation protection.
United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) was set up by the United Nations in to compile, assess and disseminate information on: • Health effects of radiation.
Calculated estimates are presented for the accumulated radiation doses behind the shields of various thicknesses in the orbits of projected at Skobeltsyn Institute of Nuclear Physics, Moscow State University system of small satellites for radiation monitoring. The results are analyzed and compared with the calculation data for other actively exploited near-Earth Cited by: 1.
Energy in the Earth System - Chapter Summary and Learning Objectives. This chapter focuses on one of the primary sources of energy for the earth: the sun.
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.
Scientific Committee on the Effects of Atomic Radiation. Immediately download the Radiation summary, chapter-by-chapter analysis, book notes, essays, quotes, character descriptions, lesson plans, and more - everything you need for studying or teaching Radiation.
Radiation inactivation analysis of enzymes. Effect of free radical scavengers on apparent target sizes. Eichler DC, Solomonson LP, Barber MJ, McCreery MJ, Ness GC. In most cases the apparent target size obtained by radiation inactivation analysis corresponds to the subunit size or to the size of a multimeric by: Earth’s magnetic field protects the planet from harmful solar and cosmic radiation.
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.
Infrequently, solar energetic particles are injected into the Earth's magnetosphere and can penetrate into low-Earth orbiting by: Radiation has two types, non-ionizing, which is mostly harmless, and ionizing. This high-energy, ionizing radiation can lead to serious problems within an organism.
Radiation energy is transferred by particles or waves. While non-ionizing radiation is relatively low-energy, ionizing radiation is so high in energy it can break chemical bonds. The energy entering, reflected, absorbed, and emitted by the Earth system are the components of the Earth's radiation budget.
Based on the physics principle of conservation of energy, this radiation budget represents the accounting of the balance between incoming radiation, which is almost entirely solar radiation, and outgoing radiation, which is partly reflected solar radiation. Ionizing radiation is the main concern for health effects since it can change chemicals’ properties in the human body.
Radiation comes from many sources including cosmic rays from the universe, the earth, as well as man-made sources such as those from nuclear fuel and medical procedures.This book is the seventh in a series of titles from the National Research Council that addresses the effects of exposure to low dose LET (Linear Energy Transfer) ionizing radiation and human health.
Updating information previously presented in the publication, Health Effects of Exposure to Low Levels of Ionizing Radiation: BEIR V, this.