Download or read book Rock Around Orbits written by Scott Kenneth Bourgeois and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to observe resident space objects (RSOs) is a necessary requirement for space situational awareness. While objects in a Low-Earth Orbit are easily observable by ground-based sensors, difficulties arise when trying to monitor objects with larger orbits far above the Earth's surface, e.g. a Geostationary Orbit. Camera systems mounted on satellites can provide an effective way to observe these objects. Using a satellite with a specific orbit relative to the RSO's orbit, one can passively observe all the objects that share the RSO's orbit over a given time without active maneuvering. An orbit can be defined by five parameters: semi-major axis, eccentricity, right ascension of ascending node, inclination, and argument of perigee ([alpha], [epsilon], [omega], i, w). Using these parameters, one can create an orbit that will surround the target orbit allowing the satellite in the Rock-Around Orbit (RAO) orbit to have a 360 degree view of RSOs in the target orbit. The RAO orbit can be applied to any circular or elliptical target orbit; and for any target orbit, there are many possible RAO orbits. Therefore, different methods are required to narrow down the selection of RAO orbits. These methods use distance limitations, time requirements, orbit perturbations, and other factors to limit the orbit selections. The first step is to determine the range of RAO semi-major axes for any given target orbit by ensuring the RAO orbit does not exceed a prescribed maximum allowable distance, dmax from the target orbit. It is then necessary to determine the eccentricity range for each possible RAO semi-major axis. This is done by ensuring the RAO still does not exceed dmax but also ensuring that the RAO orbit travels inside and outside of the target orbit. This comprises one half of the rock-around motion. The final step is to determine the inclination of the RAO orbit. Only a small inclination different from that of the target orbit is required to complete the rock-around motion while the maximum inclination is found by making sure the RAO orbit does not exceed dmax. It is then important to consider orbit perturbations, since they can destroy the synchronization between the RAO and target orbit. By examining the effects of the linear J2 perturbations on the right ascension of ascending node and argument of perigee, the correct semi-major axis, eccentricity, and inclination can be chosen to minimize the amount of fuel required for station keeping. The optimal values can be found by finding the [delta]v needed for di fferent combinations of the variables and then choosing the values that provide the minimum [delta]v. For any target orbit, there are multiple RAO orbit possibilities that can provide 360 degree coverage of a target orbit. Even after eliminating some of them based on the methods already described, there are still many possibilities. The rest of the elimination process would then be based on the mission requirements which could be the range of an on-board sensor, the thruster or reaction wheel controls, or any other number of possibilities.

Download or read book Rocks A Very Short Introduction written by Jan Zalasiewicz and published by Oxford University Press. This book was released on 2016-12-01 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rocks, more than anything else, underpin our lives. They make up the solid structure of the Earth and of other rocky planets, and are present at the cores of gas giant planets. We live on the rocky surface of the planet, grow our food on weathered debris derived from rocks, and we obtain nearly all of the raw materials with which we found our civilization from rocks. From the Earth's crust to building bricks, rocks contain our sense of planetary history, and are a guide to our future. In this Very Short Introduction Jan Zalsiewicz looks at the nature and variety of rocks, and the processes by which they are formed. Starting from the origin of rocks and their key role in the formation of the Earth, he considers what we know about the deep rocks of the mantle and core, and what rocks can tell us about the evolution of the Earth, and looks at those found in outer space and on other planets. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Download or read book Atlas of Oculoplastic and Orbital Surgery written by Thomas C. Spoor and published by CRC Press. This book was released on 2009-12-04 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its inception two generations ago, oculoplastic surgery has constantly evolved. What was once dogma may now be passé. Procedures that were once passé may be resurrected and utilized again. Providing simplified solutions to complex problems, Atlas of Oculoplastic and Orbital Surgery is a practical, problem-orientated guide to the management of common oculoplastic and orbital disorders. Based on Dr. Spoor’s thirty years of practice, the book emphasizes the more common oculoplastic conditions likely to present to a busy ophthalmologist. The text covers upper and lower eyelid surgery and repair, orbital surgery, and the prevention and treatment of potential complications. The procedures are described with surgical photos and illustrations in a casual, didactic fashion, as a senior doctor would use instructing a resident or fellow. The book is essential reading for ophthalmologists, oculoplastic surgeons, neuro-ophthalmologists and plastic surgeons.

Download or read book Earth Out Of Orbit Volume Two written by Sanctus Est Adonai and published by Word Alive Press. This book was released on with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, Volume-Two, continues to trace the histories and the prophecies of Israel through the life time of the kings of Judah. Judah is the southern half of the divided Israel, Israel North being the other half. The volume covers the years of four kings and a queen, and ranges in time from 913-835 BC, almost eighty years. All dates in the book unless specified are BC. The entire history timeline of the book is in BC.

Download or read book One Orbit written by Thomas R. MacKrell and published by Trafford Publishing. This book was released on 2006 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The trip of a lifetime. A detailed account of my trip around the world covering visits to over 40 cities and towns in sixteen countries. The good and the bad.

Download or read book A Proposed Multispectral Photography Experiment for AES Lunar Orbital Mission written by John F. Cronin and published by . This book was released on 1966 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multispectral photography for AES missions, describing lunar color studies.

Download or read book Vampires Thieves and Griffins An Orbit Sampler written by Orbit Various Authors and published by Orbit. This book was released on 2011-10-01 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Included in this ebook are sample chapters from your favorite-- and your soon to be favorite-- Orbit authors. Two new authors, one a newcomer, and the other an eBook favorite in print for the first time: Kristen Painter crafts a gothic story where vampire aristocracy meets urban fantasy action with Blood Rights (with the next two books in the series coming out in consecutive months) and Michael J. Sullivan's ebook bestseller will be available in bookstores everywhere starting with Theft of Swords. In this series opener two thieves that quickly find themselves in over their heads with plenty more to come in Rise of Empire and Heir of Novron out in December and January. We also have some returning favorites with the trade paperback edition of The Heroes by Joe Abercrombie - a critically acclaimed look at the blood and betrayal that make up the heart of a single battle. And we've collected three volumes of the Griffin Mage by Rachel Neumeier into one fantastic package. We have two returning science fiction authors, first up is Philip Palmer's rip-roaring new novel Artemis, and Hull Zero Three, by award-winning author Greg Bear.

Download or read book Fly Me to the Moon written by Edward Belbruno and published by Princeton University Press. This book was released on 2007-02-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: When a leaf falls on a windy day, it drifts and tumbles, tossed every which way on the breeze. This is chaos in action. In Fly Me to the Moon, Edward Belbruno shows how to harness the same principle for low-fuel space travel--or, as he puts it, "surfing the gravitational field." Belbruno devised one of the most exciting concepts now being used in space flight, that of swinging through the cosmos on the subtle fluctuations of the planets' gravitational pulls. His idea was met with skepticism until 1991, when he used it to get a stray Japanese satellite back on course to the Moon. The successful rescue represented the first application of chaos to space travel and ushered in an emerging new field. Part memoir, part scientific adventure story, Fly Me to the Moon gives a gripping insider's account of that mission and of Belbruno's personal struggles with the science establishment. Along the way, Belbruno introduces readers to recent breathtaking advances in American space exploration. He discusses ways to capture and redirect asteroids; presents new research on the origin of the Moon; weighs in on discoveries like 2003 UB313 (now named Eris), a dwarf planet detected in the far outer reaches of our solar system--and much more. Grounded in Belbruno's own rigorous theoretical research but written for a general audience, Fly Me to the Moon is for anybody who has ever felt moved by the spirit of discovery.

Download or read book Basic Calculus of Planetary Orbits and Interplanetary Flight written by Alexander J. Hahn and published by Springer Nature. This book was released on 2020-03-14 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intended for a one- or two-semester course, this text applies basic, one-variable calculus to analyze the motion both of planets in their orbits as well as interplanetary spacecraft in their trajectories. The remarkable spacecraft missions to the inner and outermost reaches of our solar system have been one of the greatest success stories of modern human history. Much of the underlying mathematical story is presented alongside the astonishing images and extensive data that NASA’s Voyager, NEAR-Shoemaker, Cassini, and Juno missions have sent back to us. First and second year college students in mathematics, engineering, or science, and those seeking an enriching independent study, will experience the mathematical language and methods of single variable calculus within their application to relevant conceptual and strategic aspects of the navigation of a spacecraft. The reader is expected to have taken one or two semesters of the basic calculus of derivatives, integrals, and the role that limits play. Additional prerequisites include knowledge of coordinate plane geometry, basic trigonometry, functions and graphs, including trig, inverse, exponential, and log functions. The discussions begin with the rich history of humanity’s efforts to understand the universe from the Greeks, to Newton and the Scientific Revolution, to Hubble and galaxies, to NASA and the space missions. The calculus of polar functions that plays a central mathematical role is presented in a self-contained way in complete detail. Each of the six chapters is followed by an extensive problem set that deals with and also expands on the concerns of the chapter. The instructor has the flexibility to engage them with greater or lesser intensity. “I have been an aerospace engineer for 39 years and honestly, it would be hard for me to overstate how valuable I believe this book will be to numerous scientific and engineering disciplines and in particular to the future of aerospace engineering ... This book is perfectly crafted to motivate, educate, and prepare the scientists and engineers who wish to reach for the sky and beyond.” —Dr. Mario Zoccoli, Aerospace Engineer, NASA and Lockheed Martin

Download or read book Orbital System of the Universe written by Antony Welsch and published by . This book was released on 1875 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Could an Asteroid Hit the Earth written by Rosalind Mist and published by Capstone Classroom. This book was released on 2006 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses asteroids, meteors, and other objects in space that could come to Earth and do great damage.

Download or read book The Black Hole at the Center of Our Galaxy written by Fulvio Melia and published by Princeton University Press. This book was released on 2003 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: With this superbly illustrated, elegantly written, nontechnical account of the most enigmatic astronomical object yet observed, Melia captures all the excitement of the growing realization that humans are on the verge of actually seeing this exotic black hole object within the next few years. 39 illustrations.

Download or read book International Satellite Television written by and published by . This book was released on 1983 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Orbital Motorways written by and published by Thomas Telford. This book was released on 1990 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing urbanization and the growth of private-car commuting, coupled with an increase inroad freight, have placed excessive demands on many urban road systems. Orbital motorways provide an effective solution by removing through traffic and releasing road space for local journeys. This book reviews the strategies adopted to address these issues by a variety of authorities in the UK, France, the USA and South Africa.

Download or read book The Greatest Intergalactic Guide to Space Ever by the Brainwaves written by Claire Watts and published by Penguin. This book was released on 2009-10-19 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: More delightful fun with the Brainwaves. This time they blast off into space to bring the science to you - in fabulously fun--and funny--text. Stars, galaxies, black holes, nebulae, asteroids, and more are discussed in clear text, meant to engage and entertain readers of all ages.

Download or read book Ring Around the Asteroid written by Josh Lewis and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Astronomer Jim Scotti has discovered an asteroid with two rings.

Download or read book Orbit One written by John E. Muller and published by Gateway. This book was released on 2014-08-28 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space fiction is no longer fiction in the same way that it used to be. There was an element of distance and strangeness about it a few years back. Now, fact has caught up and threatens to overtake. Science fiction today has become science prediction. An atom is a miniature solar system in some respects. The clustering molecules resemble galaxies, colloids are, perhaps, tiny models of the whole creation. Man stands midway between the unbelievably small and the unbelievably huge. This is one of the allies of science fiction. We look down into the mysteries of the infinitesimal; we look up into the majesty of the macrocosm. In all this vastness of stars and planets there must be other life. One day we shall make contact with that life. What will the aliens be like? How will human culture compete with non-human culture? Which will survive?