Viking Program
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Copyrighted Material
Index Abulfeda crater chain (Moon), 97 Aphrodite Terra (Venus), 142, 143, 144, 145, 146 Acheron Fossae (Mars), 165 Apohele asteroids, 353–354 Achilles asteroids, 351 Apollinaris Patera (Mars), 168 achondrite meteorites, 360 Apollo asteroids, 346, 353, 354, 361, 371 Acidalia Planitia (Mars), 164 Apollo program, 86, 96, 97, 101, 102, 108–109, 110, 361 Adams, John Couch, 298 Apollo 8, 96 Adonis, 371 Apollo 11, 94, 110 Adrastea, 238, 241 Apollo 12, 96, 110 Aegaeon, 263 Apollo 14, 93, 110 Africa, 63, 73, 143 Apollo 15, 100, 103, 104, 110 Akatsuki spacecraft (see Venus Climate Orbiter) Apollo 16, 59, 96, 102, 103, 110 Akna Montes (Venus), 142 Apollo 17, 95, 99, 100, 102, 103, 110 Alabama, 62 Apollodorus crater (Mercury), 127 Alba Patera (Mars), 167 Apollo Lunar Surface Experiments Package (ALSEP), 110 Aldrin, Edwin (Buzz), 94 Apophis, 354, 355 Alexandria, 69 Appalachian mountains (Earth), 74, 270 Alfvén, Hannes, 35 Aqua, 56 Alfvén waves, 35–36, 43, 49 Arabia Terra (Mars), 177, 191, 200 Algeria, 358 arachnoids (see Venus) ALH 84001, 201, 204–205 Archimedes crater (Moon), 93, 106 Allan Hills, 109, 201 Arctic, 62, 67, 84, 186, 229 Allende meteorite, 359, 360 Arden Corona (Miranda), 291 Allen Telescope Array, 409 Arecibo Observatory, 114, 144, 341, 379, 380, 408, 409 Alpha Regio (Venus), 144, 148, 149 Ares Vallis (Mars), 179, 180, 199 Alphonsus crater (Moon), 99, 102 Argentina, 408 Alps (Moon), 93 Argyre Basin (Mars), 161, 162, 163, 166, 186 Amalthea, 236–237, 238, 239, 241 Ariadaeus Rille (Moon), 100, 102 Amazonis Planitia (Mars), 161 COPYRIGHTED -
OUTER PLANET SPACECRAFT TEMPERATURE TESTING and ANALYSIS by Alan R
OUTER PLANET SPACECRAFT TEMPERATURE TESTING AND ANALYSIS by Alan R. Hoffman and Arturo Avila Jet Propulsion Laboratory, Califomia Institute of Technology, 4800 Oak Grove Dr. Pasadena, CA 91 109 USA Email: [email protected].,yov, Arturo.Avila @iuLnasa.nov Unmanned spacecraft flown on missions to the outer planets of the solar system have included flybys, planetary orbiters, and atmospheric probes during the last three decades. The thermal design, test, and analysis approach applied to these spacecraft evolved from the passive thermal designs applied to the earlier lunar and interplanetary spacecraft. The inflight temperature data from representative sets of engineering subsystems and science instruments from a subset of these spacecraft are compared to those obtained during the ground test programs and from the prelaunch predictions. The ground testing programs applied to all of these missions are characterized by: a) thermal development test activity for areas where there were significant thermal uncertainties, b) rigorous “black box level” environmental temperature testing program for the electronics and mechanisms which included a long dwell time at a hot temperature in vacuum, and c) comprehensive solar thermal vacuum test program on the flight spacecraft. Several lessons are presented with specific recommendations for considerations for new projects to aid in the planning of cost effective temperature design, test, and analysis programs. 1. INTRODUCTION The exploration of the outer planets (Jupiter, Saturn, Uranus, and Neptune) using unmanned remote sensing spacecraft has occurred during the latter part of the 20th century and continues in the early part of the 21’‘ century. The scientific data obtained has included spectacular pictures of Jupiter and its bands and of Saturn and its rings. -
Oxygen Exosphere of Mars: Evidence from Pickup Ions Measured By
Oxygen Exosphere of Mars: Evidence from Pickup Ions Measured by MAVEN By Ali Rahmati Submitted to the graduate degree program in the Department of Physics and Astronomy, and the Graduate Faculty of the University of Kansas in partial fulfillment of the requirements for the degree of Doctor of Philosophy. ________________________________ Professor Thomas E. Cravens, Chair ________________________________ Professor Philip S. Baringer ________________________________ Professor David Braaten ________________________________ Professor Mikhail V. Medvedev ________________________________ Professor Stephen J. Sanders Date Defended: 22 January 2016 The Dissertation Committee for Ali Rahmati certifies that this is the approved version of the following dissertation: Oxygen Exosphere of Mars: Evidence from Pickup Ions Measured by MAVEN ________________________________ Professor Thomas E. Cravens, Chair Date approved: 22 January 2016 ii Abstract Mars possesses a hot oxygen exosphere that extends out to several Martian radii. The main source for populating this extended exosphere is the dissociative recombination of molecular oxygen ions with electrons in the Mars ionosphere. The dissociative recombination reaction creates two hot oxygen atoms that can gain energies above the escape energy at Mars and escape from the planet. Oxygen loss through this photochemical reaction is thought to be one of the main mechanisms of atmosphere escape at Mars, leading to the disappearance of water on the surface. In this work the hot oxygen exosphere of Mars is modeled using a two-stream/Liouville approach as well as a Monte-Carlo simulation. The modeled exosphere is used in a pickup ion simulation to predict the flux of energetic oxygen pickup ions at Mars. The pickup ions are created via ionization of neutral exospheric oxygen atoms through photo-ionization, charge exchange with solar wind protons, and electron impact ionization. -
Bepicolombo - a Mission to Mercury
BEPICOLOMBO - A MISSION TO MERCURY ∗ R. Jehn , J. Schoenmaekers, D. Garc´ıa and P. Ferri European Space Operations Centre, ESA/ESOC, Darmstadt, Germany ABSTRACT BepiColombo is a cornerstone mission of the ESA Science Programme, to be launched towards Mercury in July 2014. After a journey of nearly 6 years two probes, the Magneto- spheric Orbiter (JAXA) and the Planetary Orbiter (ESA) will be separated and injected into their target orbits. The interplanetary trajectory includes flybys at the Earth, Venus (twice) and Mercury (four times), as well as several thrust arcs provided by the solar electric propulsion module. At the end of the transfer a gravitational capture at the weak stability boundary is performed exploiting the Sun gravity. In case of a failure of the orbit insertion burn, the spacecraft will stay for a few revolutions in the weakly captured orbit. The arrival conditions are chosen such that backup orbit insertion manoeuvres can be performed one, four or five orbits later with trajectory correction manoeuvres of less than 15 m/s to compensate the Sun perturbations. Only in case that no manoeuvre can be performed within 64 days (5 orbits) after the nominal orbit insertion the spacecraft will leave Mercury and the mission will be lost. The baseline trajectory has been designed taking into account all operational constraints: 90-day commissioning phase without any thrust; 30-day coast arcs before each flyby (to allow for precise navigation); 7-day coast arcs after each flyby; 60-day coast arc before orbit insertion; Solar aspect angle constraints and minimum flyby altitudes (300 km at Earth and Venus, 200 km at Mercury). -
The Voyager Program ______
Astronomy Cast Episode 199 The Voyager Program ________________________________________________________________________ Fraser: Astronomy Cast Episode 199 for Monday September 20, 2010, The Voyager Program. Welcome to Astronomy Cast, our weekly facts-based journey through the cosmos, where we help you understand not only what we know, but how we know what we know. My name is Fraser Cain, I'm the publisher of Universe Today, and with me is Dr. Pamela Gay, a professor at Southern Illinois University Edwardsville. Hi, Pamela, how are you doing? Pamela: I’m doing well, how are you doing, Fraser? Fraser: Great. 199... that’s really close to 200! Pamela: Yes, yes it is. Fraser: I know a lot of people want us to do something special for 200, but I don’t know. We’ll have to think of something. Either that, or you can just, you know, explain how to do gravitational mathematics. Everyone get pen and paper out... Pamela: No, there are some things I like myself too much to do. Explaining tensor calculus falls into that category. Fraser: Over the radio... Pamela: Over the radio, yes... Fraser: Alright, so launched in 1977, the twin Voyager spacecraft were sent to explore the outer planets... Jupiter, Saturn, Uranus, and Neptune. Because of a unique alignment of the planets, Voyager II was the first spacecraft to ever make a close approach to Uranus and Neptune. Let’s take a look back at this amazing program and see where the spacecraft are today. And I wanted to add that “are today” because they’re still going! Pamela: I know.. -
Voyager Design Studies
e > c IbAGESI (CODE) I L 3/ ~ (CATEGORY) a VOYAGER DESIGN STUDIES Volume One: Summary Prepared Under Contract Number NASw 697 .Research and Advanced Development Division .Avco Corpo- ration m Wilmington, Massachusetts National Aeronautics and Space Ad- ministration m Avco/RAD m TR-63-34 .15 October 1963 _... FOREWORD The Voyager Design Study final report is divided into six volumes, for convenience in handling. A brief description of the contents of each volume is listed below. Volume I -- Summary A completely self-contained synopsis of the entire study. Volume I1 - - Scientific Mission Analvsis Mission analysis, evolution of the Voyager program, and science payload. Volume 111 -- Systems Analysis Mission and system tradeoff studies; trajectory analysis; orbit and landing site selection; reliability; sterilization Volume rV -- Orbiter-Bus System Design Engineering and design details of the orbiter-bus Volume V -- Lander System Design Engineering and design details of the lander. Volume VI -- Development Plan Proposed development plan, schedules, costs, problem areas. 2 .- This document consists of 126 pages, 116 copies, Series A L VOYAGER DESIGN STUDIES Volume I: Summary AVCQRAD-TR-63-34 ’ 15 October 1963 Prepared under Contract No. NASw 697 by FU3SEARCH AND ADVANCED DEVELOPMENT DIVISION AVCO CORPORATION Wilmington, Massachusetts for NATIONAL AERONAUTICS AND SPACE ADMINISTRATION TABLE OF CONTENTS SUMMARY ....................................................... 1 1. INTRODUCTION ............................................... 2 2 . MISSION -
Mariner to Mercury, Venus and Mars
NASA Facts National Aeronautics and Space Administration Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109 Mariner to Mercury, Venus and Mars Between 1962 and late 1973, NASA’s Jet carry a host of scientific instruments. Some of the Propulsion Laboratory designed and built 10 space- instruments, such as cameras, would need to be point- craft named Mariner to explore the inner solar system ed at the target body it was studying. Other instru- -- visiting the planets Venus, Mars and Mercury for ments were non-directional and studied phenomena the first time, and returning to Venus and Mars for such as magnetic fields and charged particles. JPL additional close observations. The final mission in the engineers proposed to make the Mariners “three-axis- series, Mariner 10, flew past Venus before going on to stabilized,” meaning that unlike other space probes encounter Mercury, after which it returned to Mercury they would not spin. for a total of three flybys. The next-to-last, Mariner Each of the Mariner projects was designed to have 9, became the first ever to orbit another planet when two spacecraft launched on separate rockets, in case it rached Mars for about a year of mapping and mea- of difficulties with the nearly untried launch vehicles. surement. Mariner 1, Mariner 3, and Mariner 8 were in fact lost The Mariners were all relatively small robotic during launch, but their backups were successful. No explorers, each launched on an Atlas rocket with Mariners were lost in later flight to their destination either an Agena or Centaur upper-stage booster, and planets or before completing their scientific missions. -
A Tracer of CO2 Density Variations in the Martian Lower CO2 Density Provided by the Mars Climate Database Is Scaled Down by a Factor Between 0.50 and 0.66
Journal of Geophysical Research: Planets 1 RESEARCH ARTICLE The O( S) 297.2-nm Dayglow Emission: A Tracer of CO2 Density 10.1029/2018JE005709 Variations in the Martian Lower Thermosphere Key Points: L. Gkouvelis1 , J.-C. Gérard1 , B. Ritter1,2 , B. Hubert1 , N. M. Schneider3 , and S. K. Jain3 • Limb observations of the O(1S-3P) fi dayglow by MAVEN con rm 1LPAP, STAR Institute, Université de Liège, Liege, Belgium, 2Royal Observatory of Belgium, Brussels, Belgium, 3LASP, existence of previously predicted emission peak near 80 km University of Colorado Boulder, Boulder, CO, USA • We successfully model the lower peak emission profile and show that 1 it only depends on the vertical CO2 Abstract The O( S) metastable atoms can radiatively relax by emitting airglow at 557.7 and 297.2 nm. The distribution and solar Ly-alpha latter one has been observed with the Imaging Ultraviolet Spectrograph onboard the Mars Atmosphere • Combination of model and fi observations enable to constrain the and Volatile Evolution Mars orbiter since 2014. Limb pro les of the 297.2-nm dayglow have been collected slant CO2 column over the peak and near periapsis with a spatial resolution of 5 km or less. They show a double-peak structure that was previously the corresponding atmospheric predicted but never observed during earlier Mars missions. The production of both 297.2-nm layers is pressure dominated by photodissociation of CO2. Their altitude and brightness is variable with season and latitude, reflecting changes in the total column of CO2 present in the lower thermosphere. Since the lower emission peak near 85 km is solely produced by photodissociation, its peak is an indicator of the unit optical depth Correspondence to: pressure level and the overlying CO2 column density. -
March 21–25, 2016
FORTY-SEVENTH LUNAR AND PLANETARY SCIENCE CONFERENCE PROGRAM OF TECHNICAL SESSIONS MARCH 21–25, 2016 The Woodlands Waterway Marriott Hotel and Convention Center The Woodlands, Texas INSTITUTIONAL SUPPORT Universities Space Research Association Lunar and Planetary Institute National Aeronautics and Space Administration CONFERENCE CO-CHAIRS Stephen Mackwell, Lunar and Planetary Institute Eileen Stansbery, NASA Johnson Space Center PROGRAM COMMITTEE CHAIRS David Draper, NASA Johnson Space Center Walter Kiefer, Lunar and Planetary Institute PROGRAM COMMITTEE P. Doug Archer, NASA Johnson Space Center Nicolas LeCorvec, Lunar and Planetary Institute Katherine Bermingham, University of Maryland Yo Matsubara, Smithsonian Institute Janice Bishop, SETI and NASA Ames Research Center Francis McCubbin, NASA Johnson Space Center Jeremy Boyce, University of California, Los Angeles Andrew Needham, Carnegie Institution of Washington Lisa Danielson, NASA Johnson Space Center Lan-Anh Nguyen, NASA Johnson Space Center Deepak Dhingra, University of Idaho Paul Niles, NASA Johnson Space Center Stephen Elardo, Carnegie Institution of Washington Dorothy Oehler, NASA Johnson Space Center Marc Fries, NASA Johnson Space Center D. Alex Patthoff, Jet Propulsion Laboratory Cyrena Goodrich, Lunar and Planetary Institute Elizabeth Rampe, Aerodyne Industries, Jacobs JETS at John Gruener, NASA Johnson Space Center NASA Johnson Space Center Justin Hagerty, U.S. Geological Survey Carol Raymond, Jet Propulsion Laboratory Lindsay Hays, Jet Propulsion Laboratory Paul Schenk, -
ESA & ESOC Overview
NASA PM Challenge 2010 Developing the International Program/Project Management Community 9/10 February 2010 Dr. Bettina Böhm Program & Project Manager Career at ESA | Bettina Böhm | ESA/HQ | 23/11/09 | Page 1 Used with Permission PURPOSE OF ESA / ACTIVITIES “To provide for and promote, for exclusively Space science peaceful purposes, cooperation among Human spaceflight European states in space research and Exploration technology and their space applications.” Earth observation Launchers [Article 2 of ESA Convention] Navigation ESA is one of the few space agencies Telecommunications in the world to combine responsibility Technology in all areas of space activity. Operations Program & Project Manager Career at ESA | Bettina Böhm | ESA/HQ | 23/11/09 | Page 2 ESA FACTS AND FIGURES Over 30 years of experience 18 Member States 2080 staff, thereof 880 in Program Directorates, 790 in Operations and Technical Support and 410 in other Support Directorates 3 500 million Euros budget Over 60 satellites designed and tested Over 60 satellites operated in-flight and 8 missions rescued 16 scientific satellites in operation Five types of launcher developed More than 180 launches made Program & Project Manager Career at ESA | Bettina Böhm | ESA/HQ | 23/11/09 | Page 3 ESA Locations EAC (Cologne) Salmijaervi ESTEC Astronaut training (Noordwijk) Satellite technology development and testing Harwell ESOC ESA HQ (Darmstadt) (Paris) Brussels Satellite operations and ground system technology development ESAC (Villanueva de la Cañada Oberpfaffenhofen -
Impact Melt Emplacement on Mercury
Western University Scholarship@Western Electronic Thesis and Dissertation Repository 7-24-2018 2:00 PM Impact Melt Emplacement on Mercury Jeffrey Daniels The University of Western Ontario Supervisor Neish, Catherine D. The University of Western Ontario Graduate Program in Geology A thesis submitted in partial fulfillment of the equirr ements for the degree in Master of Science © Jeffrey Daniels 2018 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Geology Commons, Physical Processes Commons, and the The Sun and the Solar System Commons Recommended Citation Daniels, Jeffrey, "Impact Melt Emplacement on Mercury" (2018). Electronic Thesis and Dissertation Repository. 5657. https://ir.lib.uwo.ca/etd/5657 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected]. Abstract Impact cratering is an abrupt, spectacular process that occurs on any world with a solid surface. On Earth, these craters are easily eroded or destroyed through endogenic processes. The Moon and Mercury, however, lack a significant atmosphere, meaning craters on these worlds remain intact longer, geologically. In this thesis, remote-sensing techniques were used to investigate impact melt emplacement about Mercury’s fresh, complex craters. For complex lunar craters, impact melt is preferentially ejected from the lowest rim elevation, implying topographic control. On Venus, impact melt is preferentially ejected downrange from the impact site, implying impactor-direction control. Mercury, despite its heavily-cratered surface, trends more like Venus than like the Moon. -
N€WS 'RELEASE NATIONAL AERONAUTICS and SPACE Admln ISTRATION 400 MARYLAND AVENUE, SW, WASHINGTON 25, D.C
https://ntrs.nasa.gov/search.jsp?R=19630002483 2020-03-11T16:50:02+00:00Z b " N€WS 'RELEASE NATIONAL AERONAUTICS AND SPACE ADMlN ISTRATION 400 MARYLAND AVENUE, SW, WASHINGTON 25, D.C. TELEPHONES WORTH 2-4155-WORTH. 3-1110 RELEASE NO. 62-182 MARINER SPACECRAFT Mariner 2, the second of a series of spacecraft designed for planetary exploration,- will be launched within a few days (no earlier than August 17) from the Atlantic Missile Range, Cape Canaveral, Florida, by the National Aeronautics and Space Administration. Mariner 1, launched at 4:21 a.m. (EST) on July 22, 1962 from AMR, was destroyed by the Range Safety Officer after about 290 seconds of flight because of a deviation from the planned flight path. Measures have been taken to correct the difficulties experienced in the Mariner 1 launch. These measures include a more rigorous checkout of the Atlas rate beacon and revision of the data editing equation. The data editing equation Is designed as a guard against acceptance of faulty databy the ground guidance equipment. The Mariner 2 spacecraft and its mission are identical to the first Mariner. Mariner 2 will carry six experiments. Two of these instruments, infrared and microwave radiometers, will make measurements at close range as Mariner 2 flys by Venus and communicate this in€ormation over an interplanetary distance of 36 million miles, Four other experiments on the spacecraft -- a magnetometer, ion chamber and particle flux detector, cosmic dust detector and solar plasma spectrometer -- will gather Information on interplantetary phenomena during the trip to Venus and in the vicinity of the planet.