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Orbital Lifetime Predictions
Orbital LIFETIME PREDICTIONS An ASSESSMENT OF model-based BALLISTIC COEFfiCIENT ESTIMATIONS AND ADJUSTMENT FOR TEMPORAL DRAG co- EFfiCIENT VARIATIONS M.R. HaneVEER MSc Thesis Aerospace Engineering Orbital lifetime predictions An assessment of model-based ballistic coecient estimations and adjustment for temporal drag coecient variations by M.R. Haneveer to obtain the degree of Master of Science at the Delft University of Technology, to be defended publicly on Thursday June 1, 2017 at 14:00 PM. Student number: 4077334 Project duration: September 1, 2016 – June 1, 2017 Thesis committee: Dr. ir. E. N. Doornbos, TU Delft, supervisor Dr. ir. E. J. O. Schrama, TU Delft ir. K. J. Cowan MBA TU Delft An electronic version of this thesis is available at http://repository.tudelft.nl/. Summary Objects in Low Earth Orbit (LEO) experience low levels of drag due to the interaction with the outer layers of Earth’s atmosphere. The atmospheric drag reduces the velocity of the object, resulting in a gradual decrease in altitude. With each decayed kilometer the object enters denser portions of the atmosphere accelerating the orbit decay until eventually the object cannot sustain a stable orbit anymore and either crashes onto Earth’s surface or burns up in its atmosphere. The capability of predicting the time an object stays in orbit, whether that object is space junk or a satellite, allows for an estimate of its orbital lifetime - an estimate satellite op- erators work with to schedule science missions and commercial services, as well as use to prove compliance with international agreements stating no passively controlled object is to orbit in LEO longer than 25 years. -
Appendix 1: Venus Missions
Appendix 1: Venus Missions Sputnik 7 (USSR) Launch 02/04/1961 First attempted Venus atmosphere craft; upper stage failed to leave Earth orbit Venera 1 (USSR) Launch 02/12/1961 First attempted flyby; contact lost en route Mariner 1 (US) Launch 07/22/1961 Attempted flyby; launch failure Sputnik 19 (USSR) Launch 08/25/1962 Attempted flyby, stranded in Earth orbit Mariner 2 (US) Launch 08/27/1962 First successful Venus flyby Sputnik 20 (USSR) Launch 09/01/1962 Attempted flyby, upper stage failure Sputnik 21 (USSR) Launch 09/12/1962 Attempted flyby, upper stage failure Cosmos 21 (USSR) Launch 11/11/1963 Possible Venera engineering test flight or attempted flyby Venera 1964A (USSR) Launch 02/19/1964 Attempted flyby, launch failure Venera 1964B (USSR) Launch 03/01/1964 Attempted flyby, launch failure Cosmos 27 (USSR) Launch 03/27/1964 Attempted flyby, upper stage failure Zond 1 (USSR) Launch 04/02/1964 Venus flyby, contact lost May 14; flyby July 14 Venera 2 (USSR) Launch 11/12/1965 Venus flyby, contact lost en route Venera 3 (USSR) Launch 11/16/1965 Venus lander, contact lost en route, first Venus impact March 1, 1966 Cosmos 96 (USSR) Launch 11/23/1965 Possible attempted landing, craft fragmented in Earth orbit Venera 1965A (USSR) Launch 11/23/1965 Flyby attempt (launch failure) Venera 4 (USSR) Launch 06/12/1967 Successful atmospheric probe, arrived at Venus 10/18/1967 Mariner 5 (US) Launch 06/14/1967 Successful flyby 10/19/1967 Cosmos 167 (USSR) Launch 06/17/1967 Attempted atmospheric probe, stranded in Earth orbit Venera 5 (USSR) Launch 01/05/1969 Returned atmospheric data for 53 min on 05/16/1969 M. -
The Van Allen Probes' Contribution to the Space Weather System
L. J. Zanetti et al. The Van Allen Probes’ Contribution to the Space Weather System Lawrence J. Zanetti, Ramona L. Kessel, Barry H. Mauk, Aleksandr Y. Ukhorskiy, Nicola J. Fox, Robin J. Barnes, Michele Weiss, Thomas S. Sotirelis, and NourEddine Raouafi ABSTRACT The Van Allen Probes mission, formerly the Radiation Belt Storm Probes mission, was renamed soon after launch to honor the late James Van Allen, who discovered Earth’s radiation belts at the beginning of the space age. While most of the science data are telemetered to the ground using a store-and-then-dump schedule, some of the space weather data are broadcast continu- ously when the Probes are not sending down the science data (approximately 90% of the time). This space weather data set is captured by contributed ground stations around the world (pres- ently Korea Astronomy and Space Science Institute and the Institute of Atmospheric Physics, Czech Republic), automatically sent to the ground facility at the Johns Hopkins University Applied Phys- ics Laboratory, converted to scientific units, and published online in the form of digital data and plots—all within less than 15 minutes from the time that the data are accumulated onboard the Probes. The real-time Van Allen Probes space weather information is publicly accessible via the Van Allen Probes Gateway web interface. INTRODUCTION The overarching goal of the study of space weather ing radiation, were the impetus for implementing a space is to understand and address the issues caused by solar weather broadcast capability on NASA’s Van Allen disturbances and the effects of those issues on humans Probes’ twin pair of satellites, which were launched in and technological systems. -
SGAC-Annual-Report-2014.Pdf
ANNUAL REPORT SPACE GENERATION ADVISORY COUNCIL 2014 In support of the United Nations Programme on Space Applications A. TABLE OF CONTENTS A. Table of Contents 2 In support of the United Nations Programme B. Sponsors and Partners 4 on Space Applications 1. Introduction 10 1.1 About the SGAC 12 14 c/o European Space Policy Institute (ESPI) 1.2 Letter from the Co-chairs 15 Schwarzenbergplatz 6 1.3 Letter from the Executive Director 16 Vienna A-1030 1.4 SGAC output at a glance AUSTRIA 2. SGAC Background 22 2.1 History of the SGAC 24 26 [email protected] 2.2 Leadership and Structure 27 www.spacegeneration.org 2.3 Programme +41 1 718 11 18 30 3. The organisation in 2014 30 32 +43 1 718 11 18 99 3.1 Goal Achievement Review 3.2 SGAC Activity Highlights 36 42 © 2015 Space Generation Advisory Council 3.3 Space Generation Fusion Forum Report 3.4 Space Generation Congress Report 50 3.5 United Nations Report 62 3.6 SGAC Regional Workshops 66 3.7 SGAC Supported Events 68 3.8 Financial Summary 72 Acknowledgements 4. Projects 78 4.1 Project Outcomes and Highlights 80 The SGAC 2014 Annual Report was compiled and 4.2 Space Technologies for Disaster Management Project Group 81 edited by Minoo Rathansabapathy (South Africa/ 4.3 Near Earth Objects Project Group 82 Australia), Andrea Jaime (Spain), Laura Rose (USA) 4.4 Space Law and Policy Project Group 84 and Arno Geens (Belgium) with the assistance of 4.5 Commercial Space Project Group 86 Candice Goodwin (South Africa), Justin Park (USA), 4.6 Space Safety and Sustainability Project Group 88 Nikita Marwaha (United Kingdom), Dario Schor 4.7 Small Satellites Project Group 90 (Argentina/Canada), Leo Teeney (UK) and Abhijeet 4.8 Space Exploration Project Group 92 Kumar (Australia) in editing. -
Commercial Orbital Transportation Services
National Aeronautics and Space Administration Commercial Orbital Transportation Services A New Era in Spaceflight NASA/SP-2014-617 Commercial Orbital Transportation Services A New Era in Spaceflight On the cover: Background photo: The terminator—the line separating the sunlit side of Earth from the side in darkness—marks the changeover between day and night on the ground. By establishing government-industry partnerships, the Commercial Orbital Transportation Services (COTS) program marked a change from the traditional way NASA had worked. Inset photos, right: The COTS program supported two U.S. companies in their efforts to design and build transportation systems to carry cargo to low-Earth orbit. (Top photo—Credit: SpaceX) SpaceX launched its Falcon 9 rocket on May 22, 2012, from Cape Canaveral, Florida. (Second photo) Three days later, the company successfully completed the mission that sent its Dragon spacecraft to the Station. (Third photo—Credit: NASA/Bill Ingalls) Orbital Sciences Corp. sent its Antares rocket on its test flight on April 21, 2013, from a new launchpad on Virginia’s eastern shore. Later that year, the second Antares lifted off with Orbital’s cargo capsule, (Fourth photo) the Cygnus, that berthed with the ISS on September 29, 2013. Both companies successfully proved the capability to deliver cargo to the International Space Station by U.S. commercial companies and began a new era of spaceflight. ISS photo, center left: Benefiting from the success of the partnerships is the International Space Station, pictured as seen by the last Space Shuttle crew that visited the orbiting laboratory (July 19, 2011). More photos of the ISS are featured on the first pages of each chapter. -
Storm Time Equatorial Magnetospheric Ion Temperature Derived from TWINS ENA Flux
Storm-time equatorial magnetospheric ion temperature derived from TWINS ENA flux R. M. Katus1,2,3, A. M. Keesee2, E. Scime2, M. W. and Liemohn3 1. Department of Mathematics, Eastern Michigan University, Ypsilanti, MI, USA 2. Department of Physics and Astronomy, West Virginia University, Morgantown, WVU, USA 3. Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, USA Submitted to: Journal of Geophysical Research Corresponding author email: [email protected] AGU index terms: 2788 Magnetic storms and substorms (4305, 7954) 4305 Space weather (2101, 2788, 7900) 4318 Statistical analysis (1984, 1986) 7954 Magnetic storms (2788) 2467 Plasma temperature and density Keywords: Magnetosphere, Geomagnetic Storms, Ion Temperature, Plasma Sheet, Space Weather Key points: • We derive and statistically examine storm-time equatorial magnetospheric ion temperatures from TWINS ENA flux This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/2016JA023824 This article is protected by copyright. All rights reserved. • The TWINS ion temperature data is validated using Geotail and LANL ion temperature data • For moderate to intense storms the widest (in MLT) peak in nightside ion temperature is found to exist near 12 RE This article is protected by copyright. All rights reserved. Abstract The plasma sheet plays an integral role in the transport of energy from the magnetotail to the ring current. We present a comprehensive study of the of equatorial magnetospheric ion temperatures derived from Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) Energetic Neutral Atom (ENA) measurements during moderate to intense (Dstpeak < -60 nT) storm times between 2009 and 2015. -
Mutation of Twins Encoding a Regulator of Protein Phosphatase 2A Leads to Pattern Duplication in Drosophila Imaginal Discs
Downloaded from genesdev.cshlp.org on September 28, 2021 - Published by Cold Spring Harbor Laboratory Press Mutation of twins encoding a regulator of protein phosphatase 2A leads to pattern duplication in Drosophila imaginal discs Tadashi Uemura, 1'3 Kensuke Shiomi, 1 Shin Togashi, 2 and Masatoshi Takeichi 1 1Department of Biophysics, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan; ~Laboratory of Cell Biology, Mitsubishi Kasei Institute of Life Sciences, Machida-shi, Tokyo 194, Japan The Drosophila gene twins was identified through a P-element-induced mutation that caused overgrowth in posterior regions of the wing imaginal disc. Analyses using position-specific markers showed that the inactivation of this locus induced the formation of extra wing blade anlagen in the posterior compartment of the disc. The duplication was mirror symmetrical, and the line of the symmetry did not correspond to any of the known compartment borders. We isolated the twins gene and found that it encoded one of the regulatory subunits of protein phosphatase 2A (PP2A). These results suggest a novel aspect of physiological roles of protein dephosphorylation; that is, the control of PP2A activity is crucial for specification of tissue patterns. [Key Words: Drosophila imaginal discs; pattern duplication; protein phosphatase 2A] Received October 29, 1992; revised version accepted January 6, 1993. To elucidate how tissue-specific patterns generate from formation of adult structures. Many of the segment po- initially homogenous cell masses is one of the central larity genes belong to such a class. In imaginal discs, issues in developmental biology, and Drosophila imagi- particular segment polarity genes function for cells lo- hal discs have been providing attractive model systems cated in distinct spatial domains to acquire positional for such studies (for reviews, see Bryant 1978; Whittle identities. -
Precision Magnetometers for Aerospace Applications: a Review
sensors Review Precision Magnetometers for Aerospace Applications: A Review James S. Bennett 1,† , Brian E. Vyhnalek 2,†, Hamish Greenall 1 , Elizabeth M. Bridge 1 , Fernando Gotardo 1 , Stefan Forstner 1 , Glen I. Harris 1 , Félix A. Miranda 2,* and Warwick P. Bowen 1,* 1 School of Mathematics and Physics, The University of Queensland, St. Lucia, QLD 4072, Australia; [email protected] (J.S.B.); [email protected] (H.G.); [email protected] (E.M.B.); [email protected] (F.G.); [email protected] (S.F.); [email protected] (G.I.H.) 2 NASA Glenn Research Center, Cleveland, OH 44135, USA; [email protected] * Correspondence: [email protected] (F.A.M.); [email protected] (W.P.B.) † These authors contributed equally to this work. Abstract: Aerospace technologies are crucial for modern civilization; space-based infrastructure underpins weather forecasting, communications, terrestrial navigation and logistics, planetary observations, solar monitoring, and other indispensable capabilities. Extraplanetary exploration— including orbital surveys and (more recently) roving, flying, or submersible unmanned vehicles—is also a key scientific and technological frontier, believed by many to be paramount to the long-term survival and prosperity of humanity. All of these aerospace applications require reliable control of the craft and the ability to record high-precision measurements of physical quantities. Magnetometers deliver on both of these aspects and have been vital to the success of numerous missions. In this review Citation: Bennett, J.S.; Vyhnalek, paper, we provide an introduction to the relevant instruments and their applications. -
PHONESAT IN-FLIGHT EXPERIENCE RESULTS V4
PHONESAT IN-FLIGHT EXPERIENCE RESULTS Mr. Alberto Guillen Salas (1,2) [[email protected]] Mr. Watson Attai (1,2), Mr. Ken Y. Oyadomari (1,2), Mr. Cedric Priscal (1,2), Dr. Rogan S. Shimmin (1,2), Mr. Oriol Tintore Gazulla (1,2), Mr. Jasper L. Wolfe (1,2) (1) NASA Ames Research Center, Moffett Field (CA), United States (2)Stinger Ghaffarian Technologies (SGT,) Moffett Field (CA), United States ABSTRACT Over the last decade, consumer technology has vastly improved its performances, become more affordable and reduced its size. Modern day smartphones offer capabilities that enable us to figure out where we are, which way we are pointing, observe the world around us, and store and transmit this information to wherever we want. These capabilities are remarkably similar to those required for multi-million dollar satellites. The PhoneSat project at NASA Ames Research Center is building a series of CubeSat-size spacecrafts using an off-the-shelf smartphone as its on-board computer with the goal of showing just how simple and cheap space can be. Since the PhoneSat project started, different suborbital and orbital flight activities have proven the viability of this revolutionary approach. In early 2013, the PhoneSat project launched the first triage of PhoneSats into LEO. In the five day orbital life time, the nano-satellites flew the first functioning smartphone-based satellites (using the Nexus One and Nexus S phones), the cheapest satellite (a total parts cost below $3,500) and one of the fastest on-board processors (CPU speed of 1GHz). In this paper, an overview of the PhoneSat project as well as a summary of the in-flight experimental results is presented. -
The Siamese Twins, the Bunker Family, and Nineteenth-Century U.S
American Family, Oriental Curiosity: The Siamese Twins, the Bunker Family, and Nineteenth-Century U.S. Society Dissertation Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Joseph Andrew Orser Graduate Program in History The Ohio State University 2010 Dissertation Committee: Judy Tzu-Chun Wu, Adviser John Brooke Alan Gallay Copyright by Joseph Andrew Orser 2010 Abstract This dissertation examines the cultural and social spaces that conjoined brothers Chang and Eng Bunker occupied, interrogating the insights their lives offer into nineteenth-century ideas of race, class, gender, and respectability. Chang and Eng were conjoined twins of Chinese descent whose stage name, the Siamese Twins, derived from the country of their birth. The brothers toured the United States as “Oriental” curiosities from 1829 to 1839, and then settled in North Carolina as farmers, becoming slaveholders, marrying white sisters, and eventually fathering twenty-one children between them. In 1849, the twins returned to touring, this time taking two daughters along with them; until their deaths in 1874, Chang and Eng exhibited themselves and their offspring, touring as the Siamese Twins and Children. Through promotional literature, personal correspondence, visual images and newspaper reports, this work traces the evolution of public discourse about the twins and their families, contributing to other considerations of the twins and the course of American Orientalism. This dissertation goes further, however, by introducing early Asian Americans to considerations of the turbulent terrain of class and respectability in the 1830s and 1840s; the increasingly divisive debates over slavery, nativism, and sectionalism; and the tensions of national reunion in the years following the Civil War. -
WORLD SPACECRAFT DIGEST by Jos Heyman 2013 Version: 1 January 2014 © Copyright Jos Heyman
WORLD SPACECRAFT DIGEST by Jos Heyman 2013 Version: 1 January 2014 © Copyright Jos Heyman The spacecraft are listed, in the first instance, in the order of their International Designation, resulting in, with some exceptions, a date order. Spacecraft which did not receive an International Designation, being those spacecraft which failed to achieve orbit or those which were placed in a sub orbital trajectory, have been inserted in the date order. For each spacecraft the following information is provided: a. International Designation and NORAD number For each spacecraft the International Designation, as allocated by the International Committee on Space Research (COSPAR), has been used as the primary means to identify the spacecraft. This is followed by the NORAD catalogue number which has been assigned to each object in space, including debris etc., in a numerical sequence, rather than a chronoligical sequence. Normally no reference has been made to spent launch vehicles, capsules ejected by the spacecraft or fragments except where such have a unique identification which warrants consideration as a separate spacecraft or in other circumstances which warrants their mention. b. Name The most common name of the spacecraft has been quoted. In some cases, such as for US military spacecraft, the name may have been deduced from published information and may not necessarily be the official name. Alternative names have, however, been mentioned in the description and have also been included in the index. c. Country/International Agency For each spacecraft the name of the country or international agency which owned or had prime responsibility for the spacecraft, or in which the owner resided, has been included. -
SATELLITE-BASED LASER COMMUNICATIONS EPIC Online Technology Meeting on Quarterly Briefing on New Space Communications and Monitoring
SATELLITE-BASED LASER COMMUNICATIONS EPIC Online Technology Meeting on Quarterly Briefing on New Space Communications and Monitoring 31 MARCH 2021 CHRISTIAN FRHR. VON DER ROPP ABOUT ACCESS.SPACE is an industry body for the small satellite sector uniting 49 Christian von der Ropp companies and organizations globally Stuttgart, Germany Director & Co-Founder EPIC ONLINE TECHNOLOGY MEETING ON QUARTERLY BRIEFING ON NEW SPACE COMMUNICATIONS AND MONITORING, 31 MARCH 2021 COLLABORATION WITH EPIC • EPIC and ACCESS.SPACE today announce an MoU to collaborate and facilitate partnerships between both organizations‘ memberships. • Harnessing ecosystems and unlocking new opportunities for all members • Focussed on but not limited to laser communications EPIC ONLINE TECHNOLOGY MEETING ON QUARTERLY BRIEFING ON NEW SPACE COMMUNICATIONS AND MONITORING, 31 MARCH 2021 TERMINOLOGY Synonyms: • Free Space Optical Communications • Optical Satellite Communications • Laser Communications • Lasercomms • „Space Lasers“ EPIC ONLINE TECHNOLOGY MEETING ON QUARTERLY BRIEFING ON NEW SPACE COMMUNICATIONS AND MONITORING, 31 MARCH 2021 ACCESS.SPACE LASER-RELATED ACTIVITITES Formed in 2020 the Free Space Optical Communications Committee or FSOCC as a working group of ACCESS.SPACE is bringing together the supply chain and vendors of laser communication terminals with existing and future operators of the same with a view to promote collaboration and standardization. FSOCC Board of Chairs Christian Robert Brumley Sven Meyer-Brunswick Frhr. von der Ropp CEO at CommStar & C3PO at Company Director at Laser Light Mynaric ACCESS.SPACE Alliance Communications EPIC ONLINE TECHNOLOGY MEETING ON QUARTERLY BRIEFING ON NEW SPACE COMMUNICATIONS AND MONITORING, 31 MARCH 2021 FIBRE OPTICS VS. FREE SPACE OPTICS EPIC ONLINE TECHNOLOGY MEETING ON QUARTERLY BRIEFING ON NEW SPACE COMMUNICATIONS AND MONITORING, 31 MARCH 2021 BELL‘S ”PHOTOPHONE” AND INVENTION OF LASER fig.