Development of a Database for Rapid Approximation of Spacecraft Radiation Dose During Jupiter Flyby
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Mission to Jupiter
This book attempts to convey the creativity, Project A History of the Galileo Jupiter: To Mission The Galileo mission to Jupiter explored leadership, and vision that were necessary for the an exciting new frontier, had a major impact mission’s success. It is a book about dedicated people on planetary science, and provided invaluable and their scientific and engineering achievements. lessons for the design of spacecraft. This The Galileo mission faced many significant problems. mission amassed so many scientific firsts and Some of the most brilliant accomplishments and key discoveries that it can truly be called one of “work-arounds” of the Galileo staff occurred the most impressive feats of exploration of the precisely when these challenges arose. Throughout 20th century. In the words of John Casani, the the mission, engineers and scientists found ways to original project manager of the mission, “Galileo keep the spacecraft operational from a distance of was a way of demonstrating . just what U.S. nearly half a billion miles, enabling one of the most technology was capable of doing.” An engineer impressive voyages of scientific discovery. on the Galileo team expressed more personal * * * * * sentiments when she said, “I had never been a Michael Meltzer is an environmental part of something with such great scope . To scientist who has been writing about science know that the whole world was watching and and technology for nearly 30 years. His books hoping with us that this would work. We were and articles have investigated topics that include doing something for all mankind.” designing solar houses, preventing pollution in When Galileo lifted off from Kennedy electroplating shops, catching salmon with sonar and Space Center on 18 October 1989, it began an radar, and developing a sensor for examining Space interplanetary voyage that took it to Venus, to Michael Meltzer Michael Shuttle engines. -
Prescriptions for Excellence in Health Care a Collaboration Between Jefferson School of Population Health and Lilly Usa, Llc
PRESCRIPTIONS FOR EXCELLENCE IN HEALTH CARE A COLLABORATION BETWEEN JEFFERSON SCHOOL OF POPULATION HEALTH AND LILLY USA, LLC ISSUE 23 | WINTER 2015 EDITORIAL TABLE OF CONTENTS ACOs Due for Their Annual Checkup David B. Nash, MD, MBA A Message from Lilly: Opportunities, Uncertainty Loom in 2015 for the Editor-in-Chief Health Exchange Marketplace Ryan Urgo, MPP ....................................................2 As 2013 drew to a close, Premier with more than 190,000 physicians Healthcare Alliance predicted and other health care professionals Biography of a New ACO Joel Port, FACHE .............................................4 that participation in accountable participating.2 Although the care organizations (ACOs) would number of Medicare ACOs has Evolving Health Care Models and double in 2014 as a result of more grown more rapidly than the the Impact on Value and Quality providers developing core ACO number of non-Medicare ACOs, Bruce Perkins ...................................................6 capabilities.1 Premier’s forecast 46-52 million Americans (15%- Employers and Accountable Care was made on the basis of its 18% of the total population) are Organizations: A Good Marriage? survey of 115 senior executives patients in organizations with ACO Laurel Pickering, MPH .....................................9 that revealed a growing trend in arrangements with at least 1 payer.2 high-risk population management, coupled with reductions in cost The next question is, are ACOs and increases in health care quality doing what they are designed to do and patient satisfaction. Of those (ie, improving quality and lowering who responded: costs)? Although it is far too early to draw conclusions, the Centers • More than 75% reported for Medicare & Medicaid Services Prescriptions for Excellence in Health that they were integrating (CMS) has begun to release Care is brought to Population Health clinical and claims data to financial and quality outcomes. -
Rideshare and the Orbital Maneuvering Vehicle: the Key to Low-Cost Lagrange-Point Missions
SSC15-II-5 Rideshare and the Orbital Maneuvering Vehicle: the Key to Low-cost Lagrange-point Missions Chris Pearson, Marissa Stender, Christopher Loghry, Joe Maly, Valentin Ivanitski Moog Integrated Systems 1113 Washington Avenue, Suite 300, Golden, CO, 80401; 303 216 9777, extension 204 [email protected] Mina Cappuccio, Darin Foreman, Ken Galal, David Mauro NASA Ames Research Center PO Box 1000, M/S 213-4, Moffett Field, CA 94035-1000; 650 604 1313 [email protected] Keats Wilkie, Paul Speth, Trevor Jackson, Will Scott NASA Langley Research Center 4 West Taylor Street, Mail Stop 230, Hampton, VA, 23681; 757 864 420 [email protected] ABSTRACT Rideshare is a well proven approach, in both LEO and GEO, enabling low-cost space access through splitting of launch charges between multiple passengers. Demand exists from users to operate payloads at Lagrange points, but a lack of regular rides results in a deficiency in rideshare opportunities. As a result, such mission architectures currently rely on a costly dedicated launch. NASA and Moog have jointly studied the technical feasibility, risk and cost of using an Orbital Maneuvering Vehicle (OMV) to offer Lagrange point rideshare opportunities. This OMV would be launched as a secondary passenger on a commercial rocket into Geostationary Transfer Orbit (GTO) and utilize the Moog ESPA secondary launch adapter. The OMV is effectively a free flying spacecraft comprising a full suite of avionics and a propulsion system capable of performing GTO to Lagrange point transfer via a weak stability boundary orbit. In addition to traditional OMV ’tug’ functionality, scenarios using the OMV to host payloads for operation at the Lagrange points have also been analyzed. -
Space Sector Brochure
SPACE SPACE REVOLUTIONIZING THE WAY TO SPACE SPACECRAFT TECHNOLOGIES PROPULSION Moog provides components and subsystems for cold gas, chemical, and electric Moog is a proven leader in components, subsystems, and systems propulsion and designs, develops, and manufactures complete chemical propulsion for spacecraft of all sizes, from smallsats to GEO spacecraft. systems, including tanks, to accelerate the spacecraft for orbit-insertion, station Moog has been successfully providing spacecraft controls, in- keeping, or attitude control. Moog makes thrusters from <1N to 500N to support the space propulsion, and major subsystems for science, military, propulsion requirements for small to large spacecraft. and commercial operations for more than 60 years. AVIONICS Moog is a proven provider of high performance and reliable space-rated avionics hardware and software for command and data handling, power distribution, payload processing, memory, GPS receivers, motor controllers, and onboard computing. POWER SYSTEMS Moog leverages its proven spacecraft avionics and high-power control systems to supply hardware for telemetry, as well as solar array and battery power management and switching. Applications include bus line power to valves, motors, torque rods, and other end effectors. Moog has developed products for Power Management and Distribution (PMAD) Systems, such as high power DC converters, switching, and power stabilization. MECHANISMS Moog has produced spacecraft motion control products for more than 50 years, dating back to the historic Apollo and Pioneer programs. Today, we offer rotary, linear, and specialized mechanisms for spacecraft motion control needs. Moog is a world-class manufacturer of solar array drives, propulsion positioning gimbals, electric propulsion gimbals, antenna positioner mechanisms, docking and release mechanisms, and specialty payload positioners. -
Space Isotopic Power Systems
Space isotopiC power systems With the technology sound and growing, and units already built for missions ranging from 120 days to 5 years, the designer can and should plan appropriate space application of isotopic systems BY CAPT. R. T. CARPENTER, USAF U.S. Atomic Energy Commission A new space power system technology technology, and aerospace nuclear Concurrently, the terrestrial appli -isotopic power-has developed to safety technology contributed by the cations-the Snap-7 programs-sus the point where it can and should be program and used as a foundation for tained the isotopic power development considered by the space-vehicle de follow-on space isotopic power-system program and promoted the fission signer for use in many types of mis developments. product separations and processing sions. Because of this sound technical capability that exists within the Com The' Atomic Energy Commission's basis, the Commission's space-oriented mission today! The interest among isotopic space power program dates isotopic power development program terrestrial power users-the Navy, back to several years before Sputnik has made a steady, although some Weather Bureau, and Coast Guard I, but the program suffered a severe times slow, comeback through a series was sufficiently strong to sup:port this setback in 1959 when the Snap-1A of events since 1959, so that today a . fuels production program, whe:r:eas the generator development program was program technically comparable to interest in Snap-1A had been inade cancelled.' This pioneer program was Snap-1A could once more be under quate. At the same time, significant not completed because it may have taken with a high probability of suc quantities of the long-lived alpha been tt;lO ambitious for its day. -
Indication, from Pioneer 10/11, Galileo and Ulysses Data, of an Apparent Anomalous, Weak, Long-Range Acceleration”
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by CERN Document Server Comment on \Indication, from Pioneer 10/11, Galileo and Ulysses Data, of an Apparent Anomalous, Weak, Long-Range Acceleration" J. I. Katz Department of Physics and McDonnell Center for the Space Sciences Washington U., St. Louis, Mo. 63130 [email protected] (December 4, 1998) Pacs numbers: 04.80.-y, 95.10.Eg, 95.55.Pe Typeset using REVTEX 1 This paper [1] may have underestimated the acceleration resulting from the radiation of waste heat by the Pioneer spacecraft RTG. These generators are not very efficient; theoretical efficiencies may be as high as 20% [2] but RTG used in spacecraft more typically have electrical efficiencies of about 6% when new [3], which decline slowly as the thermoelectric material degrades and radioactive decay reduces the Carnot efficiency. Specific parameters and detailed design information for Pioneer are difficult to obtain so I adopt an initial electrical efficiency of 6%. Then the electric power at launch of 160 W [1] implied a thermal power of 2.67 kW and a waste heat of 2.51 kW. In 1997 the thermal power, decaying with thehalflifeofPu238 of 87.74 y, was 2.19 kW and the electrical power of 80 W [1] implied a waste heat of 2.11 kW. The power of a collimated beam sufficient to explain the reported anomalous acceleration aP is 85 W [1]. The same force can be obtained from the present rejected waste heat if it is radiated with cos θ =0:040, where θ is the angle between the direction of radiation and a ray from the Sun.h Ifi the 72 W of dissipated electrical power (allowing for 8 W radiated by the antenna) are radiated from the back of the spacecraft according to Lambert’s law the RTG waste heat need only give the thrust of a 37 W collimated beam, requiring cos θ =0:018. -
The Other Side
Just how did we get there? and space; like Tarzan swinging from technology, and human expertise As the outer planets plod through vine to vine through the jungle, missing to catch up. the frozen void, once every 175 years a transition by even the smallest of JPL formally proposed the Grand they line up in such a way that Jupiter’s margins would spell disaster. A few Tour in 1970, with Harris M. “Bud” gravity can be used to fing a properly months and several reams of graph Schurmeier (BS ’45, MS ’48, ENG aimed spacecraft on toward Saturn, paper later, Flandro had worked out ’49) as the project manager. This was and thence to Uranus and Neptune. In hundreds of itineraries—some reaching an A-team effort: Schurmeier had just THE the spring of 1965, Caltech aeronautics all the way to then-planet Pluto—for presided over the Mariner 6 and 7 grad student Gary Flandro (MS ’60, the upcoming launch window. His fybys of Mars, and his collaborators PhD ’67) was working part-time up boss, Elliott “Joe” Cutting, booked included JPL’s planetary program at JPL analyzing so-called gravity- him a meeting with the chief of JPL’s director, Robert Parks (BS ’44), and its assist trajectories when he realized that advanced technical studies offce, spacecraft systems manager, Raymond OTHER such a four-for-one alignment would aeronautics professor Homer Stewart Heacock (BS ’52, MS ’53). It was also occur between 1976 and 1979; (PhD ’40). Stewart embraced the idea, a gold-plated Cadillac of a mission—a intrigued by the possibilities, he set christening it the Grand Tour. -
Pioneer Anomaly: What Can We Learn from Future Planetary Exploration Missions?
56th International Astronautical Congress, Paper IAC-05-A3.4.02 PIONEER ANOMALY: WHAT CAN WE LEARN FROM FUTURE PLANETARY EXPLORATION MISSIONS? Andreas Rathke EADS Astrium GmbH, Dept. AED41, 88039 Friedrichshafen, Germany. Email: [email protected] Dario Izzo ESA Advanced Concepts Team, ESTEC, Keplerlaan 1, 2200 AG Noordwijk, The Netherlands. Email: [email protected] The Doppler-tracking data of the Pioneer 10 and 11 spacecraft show an unmodelled constant acceleration in the direction of the inner Solar System. Serious efforts have been undertaken to find a conventional explanation for this effect, all without success at the time of writing. Hence the effect, commonly dubbed the Pioneer anomaly, is attracting considerable attention. Unfortunately, no other space mission has reached the long-term navigation accuracy to yield an independent test of the effect. To fill this gap we discuss strategies for an experimental verification of the anomaly via an upcoming space mission. Emphasis is put on two plausible scenarios: non-dedicated concepts employing either a planetary exploration mission to the outer Solar System or a piggybacked micro- spacecraft to be launched from an exploration spacecraft travelling to Saturn or Jupiter. The study analyses the impact of a Pioneer anomaly test on the system and trajectory design for these two paradigms. Both paradigms are capable of verifying the Pioneer anomaly and determine its magnitude at 10% level. Moreover they can discriminate between the most plausible classes of models of the anomaly. The necessary adaptions of the system and mission design do not impair the planetary exploration goals of the missions. I. -
NASA and Planetary Exploration
**EU5 Chap 2(263-300) 2/20/03 1:16 PM Page 263 Chapter Two NASA and Planetary Exploration by Amy Paige Snyder Prelude to NASA’s Planetary Exploration Program Four and a half billion years ago, a rotating cloud of gaseous and dusty material on the fringes of the Milky Way galaxy flattened into a disk, forming a star from the inner- most matter. Collisions among dust particles orbiting the newly-formed star, which humans call the Sun, formed kilometer-sized bodies called planetesimals which in turn aggregated to form the present-day planets.1 On the third planet from the Sun, several billions of years of evolution gave rise to a species of living beings equipped with the intel- lectual capacity to speculate about the nature of the heavens above them. Long before the era of interplanetary travel using robotic spacecraft, Greeks observing the night skies with their eyes alone noticed that five objects above failed to move with the other pinpoints of light, and thus named them planets, for “wan- derers.”2 For the next six thousand years, humans living in regions of the Mediterranean and Europe strove to make sense of the physical characteristics of the enigmatic planets.3 Building on the work of the Babylonians, Chaldeans, and Hellenistic Greeks who had developed mathematical methods to predict planetary motion, Claudius Ptolemy of Alexandria put forth a theory in the second century A.D. that the planets moved in small circles, or epicycles, around a larger circle centered on Earth.4 Only partially explaining the planets’ motions, this theory dominated until Nicolaus Copernicus of present-day Poland became dissatisfied with the inadequacies of epicycle theory in the mid-sixteenth century; a more logical explanation of the observed motions, he found, was to consider the Sun the pivot of planetary orbits.5 1. -
NASA Ames Research Center Intelligent Systems and High End Computing
NASA Ames Research Center Intelligent Systems and High End Computing Dr. Eugene Tu, Director NASA Ames Research Center Moffett Field, CA 94035-1000 A 80-year Journey 1960 Soviet Union United States Russia Japan ESA India 2020 Illustration by: Bryan Christie Design Updated: 2015 Protecting our Planet, Exploring the Universe Earth Heliophysics Planetary Astrophysics Launch missions such as JWST to Advance knowledge unravel the of Earth as a Determine the mysteries of the system to meet the content, origin, and universe, explore challenges of Understand the sun evolution of the how it began and environmental and its interactions solar system and evolved, and search change and to with Earth and the the potential for life for life on planets improve life on solar system. elsewhere around other stars earth “NASA Is With You When You Fly” Safe, Transition Efficient to Low- Growth in Carbon Global Propulsion Operations Innovation in Real-Time Commercial System- Supersonic Wide Aircraft Safety Assurance Assured Ultra-Efficient Autonomy for Commercial Aviation Vehicles Transformation NASA Centers and Installations Goddard Institute for Space Studies Plum Brook Glenn Research Station Independent Center Verification and Ames Validation Facility Research Center Goddard Space Flight Center Headquarters Jet Propulsion Wallops Laboratory Flight Facility Armstrong Flight Research Center Langley Research White Sands Center Test Facility Stennis Marshall Space Kennedy Johnson Space Space Michoud Flight Center Space Center Center Assembly Center Facility -
Lessons from the Pioneer Venus Program
https://ntrs.nasa.gov/search.jsp?R=20070014676 2019-08-29T18:39:07+00:00Z View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by NASA Technical Reports Server LESSONS FROM THE PIONEER VENUS PROGRAM Steven D. Dorfman Boeing Satellite Systems, P.O. Box 92919, Los Angeles, CA 90009-2919 Good evening. It is indeed a pleasure to address a than my six years heading up the Pioneer Venus pro- group of scientists and engineers who share my enthu- gram for Hughes. siasm for space exploration. When Bernie Bienstock, tonight’s host from Boeing, first asked me to be a key- My planetary exploration experience began in the early note speaker tonight he suggested I tell war stories 70’s with the Outer Planets Grand Tour. At that time, about Pioneer Venus. Well, for a veteran like me, that’s the alignment of the outer planets presented a unique a tempting offer. And it’s a temptation I don’t intend to opportunity to fly a single spacecraft to Jupiter, Saturn, resist. So my remarks tonight will be more of a per- Uranus, Neptune and Pluto. In fact, this opportunity sonal Pioneer Venus memoir then a program history. was singled out by President Nixon as a major national As the Hughes Program Manager for the Pioneer Ve- objective, in much the same way President Bush has nus project, I gained a perspective on what it takes to announced the missions to the Moon, Mars and beyond design, build, test, launch and fly planetary missions. -
NASA History Fact Sheet
NASA History Fact Sheet National Aeronautics and Space Administration Office of Policy and Plans NASA History Office NASA History Fact Sheet A BRIEF HISTORY OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION by Stephen J. Garber and Roger D. Launius Launching NASA "An Act to provide for research into the problems of flight within and outside the Earth's atmosphere, and for other purposes." With this simple preamble, the Congress and the President of the United States created the national Aeronautics and Space Administration (NASA) on October 1, 1958. NASA's birth was directly related to the pressures of national defense. After World War II, the United States and the Soviet Union were engaged in the Cold War, a broad contest over the ideologies and allegiances of the nonaligned nations. During this period, space exploration emerged as a major area of contest and became known as the space race. During the late 1940s, the Department of Defense pursued research and rocketry and upper atmospheric sciences as a means of assuring American leadership in technology. A major step forward came when President Dwight D. Eisenhower approved a plan to orbit a scientific satellite as part of the International Geophysical Year (IGY) for the period, July 1, 1957 to December 31, 1958, a cooperative effort to gather scientific data about the Earth. The Soviet Union quickly followed suit, announcing plans to orbit its own satellite. The Naval Research Laboratory's Project Vanguard was chosen on 9 September 1955 to support the IGY effort, largely because it did not interfere with high-priority ballistic missile development programs.