DOCSLIB.ORG

Voyage on the Great Titanic Ebook

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Voyage on the Great Titanic Ebook VOYAGE ON THE GREAT TITANIC PDF, EPUB, EBOOK Ellen Emerson White | 202 pages | 01 Nov 2010 | Scholastic US | 9780545238342 | English | New York, NY, United States Voyage on the Great Titanic PDF Book The vessel's icebreaking arsenal includes a 2-in. Although the power output isn't very strong, it powers the electronics and instruments on board the Voyagers for a very long time. To Neptune and Beyond. First-class passengers didn't board until a. Voyager 1 and 2: The Grand Tour. Yet it was a matter of extremely good luck and timing that the missions were possible at all -- and an equal stroke of bad luck that almost scuttled the Voyager project before it ever left the ground. It is carrying 2, passengers and crew. It's time to head home. The icebreaker Des Groseilliers plows through pans of summer sea ice on its way to resupply the Canadian weather station on Ellesmere Island. In these rooms, vibrations from the ship's massive engines could be felt and heard. Over the course of two days, the crew loads the ft. They are both several billion miles away, farther from Earth than any other man-made object. The Voyager spacecrafts were built to fly past the outer planets Jupiter , Saturn , Neptune and Uranus and study them closely, the first time in human history they'd been observed up close. To reach the lab, we follow what is perhaps the world's longest extension cord 9 miles up a dirt road. Voyager Web site. William McMaster Murdoch, orders a hard starboard left turn, but the Titanic's right side scrapes the iceberg. Denis Coulombe, whose hand rests on the throttle. But it appears that there were around 1, passengers and officers and crew members. Type keyword s to search. If you shelled out the big bucks, you got a private room and semi-private baths. April 15, a. On the morning of April 10, , when passengers boarded Titanic from Southampton, second- and third-class travelers filed on around a. Carl Sagan wrote a book about the record, called "Murmurs of Earth. Canada's , miles of coastline -- the longest of any nation's -- encompass at least 50 major Arctic islands and more than 36, minor ones. Mounted on top of the main bus, the high-gain antenna is 12 feet 3. Power isn't expected to deplete completely until An extremely big, stable Tonka toy, I reassure myself, as we press north into more treacherous waters. To that end, even third- class rooms were private and enclosed, a modicum of luxury in their own right. Jennifer Rosenberg is a historian and writer who specializes in 20th-century history. Some icebreakers have a bubbler system, in which compressed air is forced through rows of holes across the bow to form a cushion between ship and ice. Many Earth scientists could not decode the information on the Pioneer plaque. Lawrence River and waters of the Atlantic provinces, head north in late June to activate navigation beacons for the Arctic shipping season. But those who did board the Titanic boarded at great expense. April 17, The Mackay-Bennett is the first of several ships to travel to the area where the Titanic sank to search for bodies. In the early morning hours of April 15, , all but of its 2, passengers and crew lost their lives in the icy Atlantic. The craft are running low on fuel for their orienting thrusters and will have to power down some instruments in the coming years as their plutonium runs out as well. With no atmosphere in space, they will never corrode, and there is little for them to crash into in interstellar space. Jupiter's Great Red Spot, which extends from the equator to the southern polar latitudes, as seen by the space probe Voyager 2 in So far it's smooth sailing -- conditions that don't surprise Coulombe. At the same time, important advances were being made in the science of gravity-assisted orbital trajectories. It was discovered during this inquiry that the last ice message was the only one that warned of an iceberg directly in the path of the Titanic, and it was believed that if the captain had gotten the warning that he would have changed course in time for the disaster to be avoided. Knowing the craft would be on its own much of the time, with the lag between command and response from Earth growing longer the farther the craft went into space, engineers developed a self-repairing computer system. Voyage on the Great Titanic Writer At the same time, important advances were being made in the science of gravity-assisted orbital trajectories. April 2, The Titanic leaves the dock for sea trials, which include tests of speed, turns, and an emergency stop. A star map clearly showing the location of Earth completes the picture. They don't have a sleek, aerodynamic design because there's no aerodynamic friction in space to worry about. Vessels carrying cargo from Europe to Asia thread the devious route between Greenland and the Beaufort Sea, as do, increasingly, cruise ships with tourists. Imagine a car that has been on the road continuously since , and you'll get some idea of how amazing these spacecraft are. It takes 9 hours for Samson and her flying pickup truck to shuttle drums of Jet-B fuel ashore two barrels at a time. Voyager Equipment. According to the National Snow and Ice Data Center in Colorado, warming air temperatures have limited the growth of sea ice during winter, initiating a steep decline in ice during the summer melt season. Bill, who refused to board after having a nightmare of the Titanic sinking, inspired the creation of a "Just Missed It" Club [source: Eaton ]. The information about Jupiter , Saturn , Uranus and Neptune and many of their moons that we learned from the Voyager missions wasn't just vast in quantity, but also in influence. Pellets of plutonium dioxide release heat through natural decay. Initially, the ambitious project, known as the Grand Tour, would have sent a series of probes to visit all the outer planets. With the coating, only about 40 percent of the hull needs to be touched up every two years; Inerta also increases fuel efficiency by up to 10 percent. But it appears that there were around 1, passengers and officers and crew members. Stretching before us, a solid floe of multiyear ice sits high in the water. Prev NEXT. History Expert. To that end, even third-class rooms were private and enclosed, a modicum of luxury in their own right. The two Voyagers aren't together. A relative bargain to what some are willing to pay to take part in Titanic II's Atlantic crossing. Although some instruments on the Voyagers are no longer working, they do continue to send back important information. You may be able to find more information about this and similar content at piano. A committee headed by astronomer Carl Sagan put these messages together. In addition to the band and members of the deck, engine and victualling culinary departments were the captain of the ship, Edward John Smith and Thomas Andrews, the ship's head designer. Share Twitter Pinterest Email. At the time, some voiced concerns that any hostile aliens finding the Voyager disc would have a map leading them directly to Earth. While the Voyagers themselves did all the data gathering, there were important mission elements on the ground as well. Power isn't expected to deplete completely until Voyage on the Great Titanic Reviews Titanic's designers had discerning and practical taste, but they also took great care to ensure that everyone from the well-shod passengers to the poorest travelers in steerage had a grand experience. NASA thought the public would be confused if Voyager 2 started reporting back first, so the numbering doesn't follow the launch order. Here, between Axel Heiberg and Ellesmere islands, we encounter the multiyear ice pack, as predicted by Rene Boisvert -- the on-board ice specialist, or "ice pick. Near them sits a collection of vintage snow machines, graders and sleds from half a century of polar exploration. It is so silent and pristine it seems as though nothing has changed here in millennia -- and as though nothing could change. At the same time, important advances were being made in the science of gravity-assisted orbital trajectories. In , Ellesmere Island experienced its warmest summer since ; numerous landslides rippled across the thawing permafrost. Summer Job Canada's , miles of coastline -- the longest of any nation's -- encompass at least 50 major Arctic islands and more than 36, minor ones. The science modules on board were chosen from proposals submitted by research teams across the United States. Vessels carrying cargo from Europe to Asia thread the devious route between Greenland and the Beaufort Sea, as do, increasingly, cruise ships with tourists. The boom carrying the cameras could be moved independently from the rest of the craft. The Canadian coast guard's six icebreakers, which spend the winter maintaining navigation channels in the St. May 31, The unfinished Titanic is lathered up with soap and pushed into the water for "fitting out. Both Voyager spacecraft are identical. Perhaps the most significant instruments on board the Voyagers, as far as the public is concerned, are the cameras. Denis Coulombe, whose hand rests on the throttle. Although some instruments on the Voyagers are no longer working, they do continue to send back important information. The problem was corrected successfully. This antenna is how the Voyagers receive commands from Earth and send the data they gather back.
Load more

Recommended publications
  • Predicted Performance of an X-Ray Navigation System for Future Deep Space and Lunar Missions Joel Getchius#, Anne Long‡, Mitra Farahmand‡, Luke B
    Predicted Performance of an X-ray Navigation System For Future Deep Space and Lunar Missions Joel Getchius#, Anne Long‡, Mitra Farahmand‡, Luke B. Winternitz†, Munther A. Hassouneh†, Jason W. Mitchell† † NASA Goddard Space Flight Center ‡a.i. solutions, Inc. #Omitron, Inc. American Astronautical Society 42nd Annual Guidance and Control Conference Beaver Run Resort, Breckenridge, CO February 4, 2019 X-ray Pulsar Navigation (XNAV) • Millisecond pulsars (MSPs): rapidly rotating neutron stars that pulsate across electromagnetic spectrum • Some MSPs rival atomic clock stability at long time-scales – Predict pulse arrival phase with great accuracy at any reference point in the Solar System via pulsar timing model on a spacecraft – Compare observed phase to prediction for navigation information • Why X-rays? – Many stable MSPs conveniently detectable in (soft) X-ray band – X-rays immune to interstellar dispersion thought to limit radio pulsar timing models – Highly directional compact detectors possible • Main Challenge: MSPs are very faint! Crab Pulsar (1/3 speed), Cambridge University, Lucky Image Group 2 X-ray Pulsar Navigation (XNAV) Applications • XNAV can provide autonomous navigation and timing that is of uniform quality throughout the solar system – Is enabling technology for very deep space missions – Provides backup autonomous navigation for crewed missions – Augments Deep Space Network (DSN) or op-nav techniques Pioneer plaque (Pioneer 10,11 1972-73) – Allows autonomous navigation while occulted, e.g., with pulsar periods and relative behind Sun distances to our Sun History • Pulsars were discovered in 1967 and immediately recognized as a potential tool for Galactic navigation • US Naval Research Laboratory (NRL) (1999-2000) – Unconventional Stellar Aspect (USA) Experiment • DARPA XNAV, XTIM Projects (2005-2006, 2009-2012) • Significant body of research (international interest, academic research, several Ph.D.
    [Show full text]
  • Remixing the Voyager Interstellar Record Or, As Extraterrestrials Might Listen
    Journal of Sonic Studies 8 (2014) Sounds of Space: http://www.researchcatalogue.net/view/109536/109537 Remixing the Voyager Interstellar Record Or, As Extraterrestrials Might Listen Stefan Helmreich Contextualizing the Context In 2010, scientists claiming to belong to a dissenting faction of the Search for Extraterrestrial Intelligence (SETI) contacted Seeland Records. Calling themselves the Search for Extraterrestrial Intelligence in Exile, or SETI-X, the group claimed to have received an alien transmission of rearranged sound from the Voyager Golden Record, a phonograph album famously sent into outer space in 1977 on each of NASA’s two Voyager spacecraft (Figure 1). The Golden Record had been put together in the mid-1970s by a panel convened by astronomer Carl Sagan, and it held a program of sounds and music of Earth, representing to imagined aliens our planet’s soundscapes, voices, and musical traditions. [1] Figure 1: The Voyager Golden Record. Side 1, on left, is the analog audio program. Side 2, on right, instructions to extraterrestrials on how to play the record. [2] 1 Because the scientists of SETI-X wished to remain anonymous, Seeland sought a public voice or commentator from other quarters. Because the label had in 2003 released a CD I had created, Xerophonics: Copying Machine Music, a science- and-technology themed mix of sounds of indefinite ownership (Helmreich 2003), and because I had also written about scientific notions of extraterrestrial life (Helmreich 2006), Seeland reasoned that I might be appropriately positioned to offer thoughts on the SETI-X document. They asked me to comment, which I did in a few venues (including, among other sites, the Los Angeles Daily News [Mills 2010].
    [Show full text]
  • Prusaprinters
    PIONEER Plaque (1972 & 1973) - Message to the Universe M4NU VIEW IN BROWSER updated 30. 1. 2021 | published 30. 1. 2021 Summary #RespectSciences Print a piece of Space History Size : 228.6mm x 152.4mm x 1.4mm (Real Size) The Pioneer plaques are a pair of gold-anodized aluminum plaques that were placed on board the 1972 Pioneer 10 and 1973 Pioneer 11 spacecraft, featuring a pictorial message, in case either Pioneer 10 or 11 is intercepted by intelligent extraterrestrial life. The plaques show the nude figures of a human male and female along with several symbols that are designed to provide information about the origin of the spacecraft. (Wikipedia) It would be faster to send them Gcodes. f k h d 4.81 hrs 1 pcs 0.20 mm 0.40 mm 1 62.00 g Prusa MK3/S/S+ Learning > Physics & Astronomy alien human universe universal spaceship space plaque nasa gold Printed on MK3S Filament tested : PLA Nozzle 0.4mm : 0.2mm tested 0.25mm nozzle would be better but 0.4mm is nice • Add a 10mm brim if you want to avoid unsticking angles. • Use External perimeters first to improve the precision of the engravings. • Slow temperature printing (190-200°C) can improve the precision of the engravings. • Use Monotonic for top. • Import the 2 files in the slicer and adjust the superposition. • First print Pioneer 1rst Layer (Gold) • Then print Pioneer Plaque 1: up to 0.60mm (Black or Red) 2: above 0.80mm (Gold) PrusaSlicer 2.3.0 F3 Print Files (.gcode) 3D DOWNLOAD ALL FILES pioneer-plaque_02mm_pla_mk3s_4h49m.gcode4.0 MB F3 updated 27.
    [Show full text]
  • Wojahn Blackbird Commentary
    “On Hearing That My Poems Were Being Studied in a Distant Place”: Thoughts on Distance, Difficulty, and Secret Addressees By David Wojahn Published in Blackbird: An Online Journal of Literature and the Arts Spring 2016, Vol. 15 No. 1 So-called “public intellectuals” tend not to have exceptionally long afterlives. We have heard their names—the likes of H.L. Mencken, Margaret Mead, Mary McCarthy, Lionel Trilling, and Edmund Wilson—but all have become footnotes in our cultural history. Also on the verge of cultural oblivion is the most telegenic and popular public intellectual of the late twentieth century, astronomer and astrophysicist Carl Sagan. His many books were bestsellers; he was a regular guest on Johnny Carson; Cosmos, the PBS series which he developed, coproduced, and moderated, was an immense success when first broadcast in 1980. And, last but not least, his highly idiosyncratic speaking voice—haunting but oddly nasal and prone to doing downright weird things with vowels—was as unmistakable as it was widely lampooned. As with Bob Dylan, once you heard that voice you would never get it out of your head. But Sagan’s voice has outlasted his reputation. Since his death in 1996, a foundation has been named after him, and many of his books remain in print, but Sagan seems, even to those who know him, a relic of the 1970s and early ’80s—he’s down in the cultural junk drawer with the Walkman, the shoulder pads, the big hair, Cyndi Lauper, and the presidency of Ronald Reagan. Yet one of Sagan’s projects has a certain loopy relevance to the topic I will discuss tonight.
    [Show full text]
  • NASA Aims to Improve Aviation Safety Star Can Be Calculated by Measuring the Time Between Successive Dips As the Planet Orbits the Star
    September 2010 - A Quarterly Publication NASA’s Kepler Mission discovers two planets transiting same star BY MICHAEL MEWHINNEY servatory in Hawaii. The observations 19 days, while Kepler-9c has an orbit NASA's Kepler spacecraft has show Kepler-9b is the larger of the two of about 38 days. By observing several discovered the first confirmed planetary planets, and both have masses similar transits by each planet over the seven system with more than one planet cross- to but less than Saturn. Kepler-9b lies months of data, the time between suc- ing in front of, or transiting, the same closest to the star with an orbit of about continued on page 15 star. The transit signatures of two distinct planets were seen in the data for the sun-like star designated Kepler-9. The planets were named Kepler-9b and 9c. Worlds on the Edge - This artist’s con- The discovery incorporates cept illustrates the two Saturn-sized seven months of observa- planets discovered by NASA’s Kepler tions of more than 156,000 Mission. The star system is oriented stars as part of an ongo- edge-on, as seen by Kepler, such that both planets cross in front, or transit, ing search for Earth-sized their star, named Kepler-9. This is the planets outside our solar first star system found to have multiple system. The findings will transiting planets. be published in the journal Science. Kepler's ultra-precise camera measures tiny decreases in the stars' brightness that occur when a planet transits them. The NASA image credit: NASA/Ames/JPL-Caltech size of the planet can be derived from these temporary dips.
    [Show full text]
  • Ringworld: Travellers' Tales from Saturn
    Utah State University DigitalCommons@USU Public Talks Astrophysics 3-21-2009 Ringworld: Travellers' Tales from Saturn Shane L. Larson Utah State University Follow this and additional works at: https://digitalcommons.usu.edu/astro_pubtalks Part of the Astrophysics and Astronomy Commons Recommended Citation Larson, Shane L., "Ringworld: Travellers' Tales from Saturn" (2009). Public Talks. Paper 19. https://digitalcommons.usu.edu/astro_pubtalks/19 This Presentation is brought to you for free and open access by the Astrophysics at DigitalCommons@USU. It has been accepted for inclusion in Public Talks by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. RINGWORLD: Travellers’ Tales from Saturn Shane L. Larson Department of Physics Utah State University [email protected] Clark Planetarium Salt Lake City, UT 21 March 2009 1 Storyline Saturn Unveiled Emissaries Saturn up close Rings and Moons 2 Galileo Galilei In 1609, Galileo heard of the invention of the telescope By 1610, he had constructed one and observed the skies “I render infinite thanks to God for being so kind as to make me alone the first observer of marvels kept hidden in obscurity for all previous centuries.” Stars, the Moon, Venus, Mars, Jupiter, and Saturn 3 Saturn through a telescope Initially Galileo didn’t know what he was seeing “Saturn has ears.” Galileo’s early scopes weren’t the greatest! In 1655 Christiaan Huygens observed Saturn and proposed “It is surrounded by a thin, flat, ring, nowhere touching, inclined to the ecliptic.” This is what Saturn really looks like through a telescope! But we wanted to see Saturn up close, and personal..
    [Show full text]
  • Searches for Life and Intelligence Beyond Earth
    Technologies of Perception: Searches for Life and Intelligence Beyond Earth by Claire Isabel Webb Bachelor of Arts, cum laude Vassar College, 2010 Submitted to the Program in Science, Technology and Society in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in History, Anthropology, and Science, Technology and Society at the Massachusetts Institute of Technology September 2020 © 2020 Claire Isabel Webb. All Rights Reserved. The author hereby grants to MIT permission to reproduce and distribute publicly paper and electronic copies of this thesis document in whole or in part in any medium now known or hereafter created. Signature of Author: _____________________________________________________________ History, Anthropology, and Science, Technology and Society August 24, 2020 Certified by: ___________________________________________________________________ David Kaiser Germeshausen Professor of the History of Science (STS) Professor of Physics Thesis Supervisor Certified by: ___________________________________________________________________ Stefan Helmreich Elting E. Morison Professor of Anthropology Thesis Committee Member Certified by: ___________________________________________________________________ Sally Haslanger Ford Professor of Philosophy and Women’s and Gender Studies Thesis Committee Member Accepted by: ___________________________________________________________________ Graham Jones Associate Professor of Anthropology Director of Graduate Studies, History, Anthropology, and STS Accepted by: ___________________________________________________________________
    [Show full text]
  • Arxiv:2107.07283V3 [Astro-Ph.IM] 27 Jul 2021
    Draft version July 28, 2021 Typeset using LATEX default style in AASTeX63 Strategies and Advice for the Search for Extraterrestrial Intelligence Jason T. Wright 1, 2, 3 1Penn State Extraterrestrial Intelligence Center, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA 2Department of Astronomy & Astrophysics, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA 3Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA ABSTRACT As a guide for astronomers new to the field of technosignature search (i.e. SETI), I present an overview of some of its observational and theoretical approaches. I review some of the various observational search strategies for SETI, focusing not on the variety of technosignatures that have been proposed or which are most likely to be found, but on the underlying philosophies that motivate searches for them. I cover passive versus active searches, ambiguous versus dispositive kinds of technosignatures, com- mensal or archival searches versus dedicated ones, communicative signals versus \artifacts", \ac- tive" versus derelict technologies, searches for beacons versus eavesdropping, and model-based versus anomaly-based searches. I also attempt to roughly map the landscape of technosignatures by kind and the scale over which they appear. I also discuss the importance of setting upper limits in SETI, and offer a heuristic for how to do so in a generic SETI search. I mention and attempt to dispel several misconceptions about the field. I conclude with some personal observations and recommendations for how to practice SETI, including how to choose good theory projects, how to work with experts and skeptics to improve one's search, and how to plan for success.
    [Show full text]
  • Galactic Navigation Using the Pioneer Spacecraft Pulsar Map
    Galactic Navigation using the Pioneer Spacecraft Pulsar Map Richard A. Russel Deep Space Exploration Society Abstract This paper analyzes the Pioneer and Voyager spacecraft pulsar map. The analysis includes the interpretation and identification of the pulsars in the map and the technique to triangulate the Sun’s position using basic geometric measurements. The use of this map to navigate from an extrasolar planet to the Sun is also explored. 1. Introduction In 1972, the Pioneer 10 spacecraft was launched to explore Jupiter and then became the first of five probes to have the necessary escape velocity to leave the solar system. [1] Pioneers 10 &11 and Voyagers 1 & 2 spacecraft contained a plaque developed by Frank Drake and Carl Sagan that shows the location of Earth using a pulsar map. The Deep Space Exploration Society [2] is preparing the 60-foot radio telescope for pulsar detection. This is the first of many papers planned involving pulsars and has been a good start in jump-starting the organizations learning curve. This paper also analyzes an approach on how an Extraterrestrial Intelligence (ETI) could interpret and use the map to navigate to Earth from an extrasolar planet. 2. Pulsar Map The pulsar map is shown in Figure 1 [3]. The map includes a depiction of the hydrogen atom, a geometric depiction of pulsars relative to Earth and the galactic center, and a depiction of Earth’s position in the solar system. Figure 1: Pioneer and Voyager Spacecraft Pulsar Map 3. Analysis Approach The analysis approach follows the work done by Johnston in 2007.
    [Show full text]
  • Life in the Universe
    Northeastern Illinois University Life in the Universe Greg Anderson Department of Physics & Astronomy Northeastern Illinois University Winter-Spring 2020 c 2012-2020 G. Anderson Introduction to Astronomy – slide 1 / 92 Northeastern Illinois Overview University Daing Rocks Life on Earth How Did Life Arise? Life in the Solar System Life Around Other Stars Interstellar Travel SETI Review c 2012-2020 G. Anderson Introduction to Astronomy – slide 2 / 92 Northeastern Illinois University Daing Rocks Zircon Dating Sedimentary Grand Canyon Life on Earth How Did Life Arise? Life in the Solar System Life Around Daing Rocks Other Stars Interstellar Travel SETI Review c 2012-2020 G. Anderson Introduction to Astronomy – slide 3 / 92 Northeastern Illinois Zircon Dating University Zircon, (ZrSiO4), minerals incorporate trace amounts of uranium but reject lead. Naturally occuring uranium: • U-238: 99.27% • U-235: 0.72% Decay chains: • 238U −→ 206Pb, τ =4.47 Gyrs. • 235U −→ 207Pb, τ = 704 Myrs. 1956, Clair Camron Patterson dated the Canyon Diablo meteorite: τ =4.55 Gyrs. c 2012-2020 G. Anderson Introduction to Astronomy – slide 4 / 92 Northeastern Illinois Dating Sedimentary Rocks University • Relative ages: Deeper layers were deposited earlier • Absolute ages: Decay of radioactive isotopes old (deposited last) oldest (depositedolder first) c 2012-2020 G. Anderson Introduction to Astronomy – slide 5 / 92 Grand Canyon: Earth History from 200 million - 2 billion yrs ago. Northeastern Illinois University Daing Rocks Life on Earth Earth History Timeline Late Heavy Bombardment Hadean Greenland Shark Bay Stromatolites Cyanobacteria Life on Earth Q: Earliest Fossils? O2 History Q: Life on Earth How Did Life Arise? Life in the Solar System Life Around Other Stars Interstellar Travel SETI Review c 2012-2020 G.
    [Show full text]
  • Future of Text Book 2020.Pdf
    THE FUTURE OF TEXT Edited by Frode Alexander Hegland First Published 2020. All articles are © Copyright of their respective authors. This collected work is © Copyright ‘Future Text Publishing’ and Frode Alexander Hegland. The PDF edition of this work is made available at no cost and the printed book is available from ‘Future Text Publishing’ (futuretextpublishing.com) a trading name of ‘The Liquid Information Company’. This work is freely available digitally, permitting any users to read, download, copy, distribute, print, search, or link to the full texts of these articles, crawl them for indexing, pass them as data to software, or use them for any other lawful purpose, without financial, legal, or technical barriers other than those inseparable from gaining access to the internet itself. The only constraint on reproduction and distribution, and the only role for copyright in this domain, should be to give authors control over the integrity of their work and the right to be properly acknowledged and cited. Typeset in Adobe Caslon Pro and Shinglewoode by Timothy Donaldson except for Kindle. ISBN: 9798556866782 DOI: https://doi.org/10.48197/fot2020a future text publishing HOW TO READ THIS BOOK IN READER If you are reading this book in the Augmented Text Tool ‘Reader’ on macOS, which was developed to demonstrate some of the editor’s ideas about interactive text, you can interact with the text in experimental ways: • Copy As Citation: Copy and paste text into a visual-meta aware word processor, such as Author (see the ‘Visual-Meta’ section in this book) and it will paste as a full citation.
    [Show full text]
  • NASA Station Explorer for X-Ray Timing and Navigation Technology (SEXTANT) Mission Operations Architecture
    NASA Station Explorer for X-ray Timing and Navigation Technology (SEXTANT) Mission Operations Architecture Wayne H. Yu†, Sean R. Semper†, Jason W. Mitchell†, Luke B. Winternitz†, Munther A. Hassouneh†, Samuel R. Price†, Paul S. Ray ‡, Kent S. Wood #, Keith C. Gendreau†, Zaven Arzoumanian† † NASA Goddard Space Flight Center ‡U.S. Naval Research Laboratory #Praxis Inc., resident at Naval Research Laboratory 70th International Astronautical Congress Washington, D.C. October 23rd, 2019 X-ray Pulsar Navigation (XNAV) • Millisecond pulsars (MSPs): rapidly rotating neutron stars that pulsate across electromagnetic spectrum • Some MSPs rival atomic clock stability at long time-scales – Predict pulse arrival phase with great accuracy at any reference point in the Solar System via pulsar timing model on a spacecraft – Compare observed phase to prediction for navigation information • Why X-rays? – Many stable MSPs conveniently detectable in (soft) X-ray band – X-rays immune to interstellar dispersion thought to limit radio pulsar timing models – Highly directional compact detectors possible • Main Challenge: MSPs are very faint! Crab Pulsar (1/3 speed), Cambridge University, Lucky Image Group https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20190001154.pdf 2 X-ray Pulsar Navigation (XNAV) Applications • XNAV can provide autonomous navigation and timing that is of uniform quality throughout the solar system – Is enabling technology for very deep space missions – Provides backup autonomous navigation for crewed missions – Augments Deep Space Network
    [Show full text]