A Survey of Communication Sub-Systems for Intersatellite
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A Survey and Assessment of the Capabilities of Cubesats for Earth Observation
Acta Astronautica 74 (2012) 50–68 Contents lists available at SciVerse ScienceDirect Acta Astronautica journal homepage: www.elsevier.com/locate/actaastro Review A survey and assessment of the capabilities of Cubesats for Earth observation Daniel Selva a,n, David Krejci b a Massachusetts Institute of Technology, Cambridge, MA 02139, USA b Vienna University of Technology, Vienna 1040, Austria article info abstract Article history: In less than a decade, Cubesats have evolved from purely educational tools to a standard Received 2 December 2011 platform for technology demonstration and scientific instrumentation. The use of COTS Accepted 9 December 2011 (Commercial-Off-The-Shelf) components and the ongoing miniaturization of several technologies have already led to scattered instances of missions with promising Keywords: scientific value. Furthermore, advantages in terms of development cost and develop- Cubesats ment time with respect to larger satellites, as well as the possibility of launching several Earth observation satellites dozens of Cubesats with a single rocket launch, have brought forth the potential for University satellites radically new mission architectures consisting of very large constellations or clusters of Systems engineering Cubesats. These architectures promise to combine the temporal resolution of GEO Remote sensing missions with the spatial resolution of LEO missions, thus breaking a traditional trade- Nanosatellites Picosatellites off in Earth observation mission design. This paper assesses the current capabilities of Cubesats with respect to potential employment in Earth observation missions. A thorough review of Cubesat bus technology capabilities is performed, identifying potential limitations and their implications on 17 different Earth observation payload technologies. These results are matched to an exhaustive review of scientific require- ments in the field of Earth observation, assessing the possibilities of Cubesats to cope with the requirements set for each one of 21 measurement categories. -
Softbank Corp. Annual Report 2019 Softbank Corp
SoftBank Corp. Annual Report 2019 SoftBank Corp. We don’t just dream. We make things happen. We’re going beyond just being a carrier — we’re transforming into a visionary platformer. We don’t just dream up things. We take the world’s advanced ideas, and turn them into reality with our drive to make things happen. We do this so tomorrow’s people will be the happiest in human history. SoftBank Corp. ANNUAL REPORT 2019 1 Introducing Our First Annual Report SoftBank Group Corporate Philosophy Ken Miyauchi President & CEO Information Revolution SoftBank Corp. — Happiness for Everyone In December 2018, SoftBank Corp. (the “Company” or “SoftBank”) of this technological evolution, SoftBank has expanded its business listed its shares on the First Section of the Tokyo Stock Exchange. scale in step with society’s growth. The second is our ability to grow I would like to begin by expressing my sincere gratitude to our businesses. We have expanded our business operations by bringing shareholders, investors, and other stakeholders for their support together and regenerating companies in crisis, including JAPAN to date. TELECOM CO., LTD., Vodafone K.K., WILLCOM, Inc., and eAccess Ltd. The third is our ability to overcome adverse environments. In its role as a strategic holding company, our parent company Sometimes, we have faced headwinds, but we have always taken SoftBank Group Corp. (“SoftBank Group”). is accelerating the pace on adverse situations directly, focused on self-improvement, and of global investment in accordance with the Cluster of No. 1 AI thereby achieved further growth. Strategy. Meanwhile, as the primary operating company in Japan With a view to communicating our growth strategy and related and with the telecommunications business at its core, SoftBank is initiatives more clearly, we have issued our first annual report, Since our founding, the SoftBank Group has sought to use the engaging in a wide range of businesses. -
Recent Development of Net Neutrality Conditions in Japan: Impact of Fiber Wholesale and Long-Term Evolution (LTE)
A Service of Leibniz-Informationszentrum econstor Wirtschaft Leibniz Information Centre Make Your Publications Visible. zbw for Economics Jitsuzumi, Toshiya Conference Paper Recent Development of Net Neutrality Conditions in Japan: Impact of Fiber Wholesale and Long-term Evolution (LTE) 26th European Regional Conference of the International Telecommunications Society (ITS): "What Next for European Telecommunications?", Madrid, Spain, 24th-27th June, 2015 Provided in Cooperation with: International Telecommunications Society (ITS) Suggested Citation: Jitsuzumi, Toshiya (2015) : Recent Development of Net Neutrality Conditions in Japan: Impact of Fiber Wholesale and Long-term Evolution (LTE), 26th European Regional Conference of the International Telecommunications Society (ITS): "What Next for European Telecommunications?", Madrid, Spain, 24th-27th June, 2015, International Telecommunications Society (ITS), Calgary This Version is available at: http://hdl.handle.net/10419/127152 Standard-Nutzungsbedingungen: Terms of use: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Documents in EconStor may be saved and copied for your Zwecken und zum Privatgebrauch gespeichert und kopiert werden. personal and scholarly purposes. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle You are not to copy documents for public or commercial Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich purposes, to exhibit the documents publicly, to make them machen, vertreiben oder anderweitig nutzen. publicly available on the internet, or to distribute or otherwise use the documents in public. Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, If the documents have been made available under an Open gelten abweichend von diesen Nutzungsbedingungen die in der dort Content Licence (especially Creative Commons Licences), you genannten Lizenz gewährten Nutzungsrechte. -
Istanbul Technical University Institute of Science And
İSTANBUL TECHNICAL UNIVERSITY « INSTITUTE OF SCIENCE AND TECHNOLOGY DESIGN STUDY OF A COMMUNICATION SUBSYSTEM AND GROUND STATION FOR ITU-pSAT II M.Sc. Thesis by Melih FİDANOĞLU Department : Institue of Science and Technology Programme : Defence Technologies JANUARY 2011 İSTANBUL TECHNICAL UNIVERSITY « INSTITUTE OF SCIENCE AND TECHNOLOGY DESIGN STUDY OF A COMMUNICATION SUBSYSTEM AND GROUND STATION FOR ITU-pSAT II M.Sc. Thesis by Melih FİDANOĞLU (514071013) Date of submission : 20 December 2010 Date of defence examination: 24 January 2011 Supervisor (Chairman) : Assoc. Prof. Dr. Gökhan İNALHAN (ITU) Members of the Examining Committee : Prof. Dr. İbrahim ÖZKOL (ITU) Prof. Dr. Metin Orhan KAYA (ITU) JANUARY 2011 İSTANBUL TEKNİK ÜNİVERSİTESİ « FEN BİLİMLERİ ENSTİTÜSÜ ITU-pSAT II İÇİN İLETİŞİM ALTSİSTEMİ VE YER İSTASYONU TASARIM ÇALIŞMASI YÜKSEK LİSANS TEZİ Melih FİDANOĞLU (514071013) Tezin Enstitüye Verildiği Tarih : 20 Aralık 2010 Tezin Savunulduğu Tarih : 24 Ocak 2011 Tez Danışmanı : Doç. Dr. Gökhan İnalhan (İTÜ) Diğer Jüri Üyeleri : Prof. Dr. İbrahim Özkol (İTÜ) Prof. Dr. Metin Orhan Kaya (İTÜ) OCAK 2011 FOREWORD First of all, I would like to thank my advisor, Gökhan İnalhan for the opportunity to work in the fantastic setup of Control and Avionics Laboratory and to work with the research team here. I would like to thank ITU-pSAT II project team including Emre Koyuncu, Melahat Cihan, Elgiz Başkaya and Soner Işıksal for being my project teammates. Also, my sincere thanks goes to Control and Avionics Lab's fellow labmates, including, but not limited to, Serdar Ateş, Oktay Arslan and Nazım Kemal Üre. A special thanks goes to TÜBİTAK. Without their contributions, this project would not be possible. -
The United States-Japan Negotiations on Interconnection Pricing
Volume 43, Number 2, Spring 2002 Exporting Telecommunications Regulation: The United States-Japan Negotiations on Interconnection Pricing Jeffrey H. Rohlfs∗ J. Gregory Sidak∗∗ I. Introduction On February 15, 1997, seventy countries working within the framework of the World Trade Organization (WTO) agreed on a multilateral reduction of regulatory barriers to competition in international telecommunications services.1 At the time, the signatory nations to the WTO agreement on tele- communications services represented markets generating ninety-five percent of the $600 billion in global telecommunications revenues.2 Beginning January 1, 1998, those nations started a phased process to open their tele- communications markets to competition. Since 1997, the U.S. government has attempted to use the WTO agreement on telecommunications services as a vehicle for “exporting” American principles of telecommunications regula- tion to other nations. Part II of this Article explains how in 1997 the United States took the position that the WTO agreement on telecommunications services requires ∗ A.B., Amherst College, 1965; Ph.D., Massachusetts Institute of Technology, 1969. Principal, Strate- gic Policy Research, Inc., Bethesda, Maryland. ∗∗ A.B. Stanford University, 1977; A.M., J.D., Stanford University, 1981. F. K. Weyerhaeuser Fellow in Law and Economics Emeritus, American Enterprise Institute for Public Policy Research, Washington, D.C. The views expressed here are solely our own, and not those of the American Enterprise Institute, which does not take institutional positions on speciªc legislative or regulatory matters. We thank Martin Cave, Robert W. Crandall, Gary Epstein, Harold Furchtgott-Roth, Edward M. Graham, William Lake, Herbert Marks, Mark S. McConnell, John Thorne, and Masayoshi Yamashita for helpful comments. -
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. -
Pocketqube Standard Issue 1 7Th of June, 2018
The PocketQube Standard Issue 1 7th of June, 2018 The PocketQube Standard June 7, 2018 Contributors: Organization Name Authors Reviewers TU Delft S. Radu S. Radu TU Delft M.S. Uludag M.S. Uludag TU Delft S. Speretta S. Speretta TU Delft J. Bouwmeester J. Bouwmeester TU Delft - A. Menicucci TU Delft - A. Cervone Alba Orbital A. Dunn A. Dunn Alba Orbital T. Walkinshaw T. Walkinshaw Gauss Srl P.L. Kaled Da Cas P.L. Kaled Da Cas Gauss Srl C. Cappelletti C. Cappelletti Gauss Srl - F. Graziani Important Note(s): The latest version of the PocketQube Standard shall be the official version. 2 The PocketQube Standard June 7, 2018 Contents 1. Introduction ............................................................................................................................................................... 4 1.1 Purpose .............................................................................................................................................................. 4 2. PocketQube Specification ......................................................................................................................................... 4 1.2 General requirements ....................................................................................................................................... 5 2.2 Mechanical Requirements ................................................................................................................................. 5 2.2.1 Exterior dimensions .................................................................................................................................. -
FASTSAT a Mini-Satellite Mission…..A Way Ahead”
Proposed Abstract: Under the combined Category and Title: “FASTSAT a Mini-Satellite Mission…..A Way Ahead” Authors: Mark E. Boudreaux, Joseph Casas, Timothy A. Smith The Fast Affordable Science and Technology Spacecraft (FASTSAT) is a mini-satellite weighing less than 150 kg. FASTSAT was developed as government-industry collaborative research and development flight project targeting rapid access to space to provide an alternative, low cost platform for a variety of scientific, research, and technology payloads. The initial spacecraft was designed to carry six instruments and launch as a secondary “rideshare” payload. This design approach greatly reduced overall mission costs while maximizing the on-board payload accommodations. FASTSAT was designed from the ground up to meet a challenging short schedule using modular components with a flexible, configurable layout to enable a broad range of payloads at a lower cost and shorter timeline than scaling down a more complex spacecraft. The integrated spacecraft along with its payloads were readied for launch 15 months from authority to proceed. As an ESPA-class spacecraft, FASTSAT is compatible with many different launch vehicles, including Minotaur I, Minotaur IV, Delta IV, Atlas V, Pegasus, Falcon 1/1e, and Falcon 9. These vehicles offer an array of options for launch sites and provide for a variety of rideshare possibilities. FASTSAT a Mini Satellite Mission …..A Way Ahead 15th Annual Space & Missile Defense Conference Session Track 1.2 : Operations for Small, Tactical Satellites Mark Boudreaux/NASA -
Ground-Based Demonstration of Cubesat Robotic Assembly
Ground-based Demonstration of CubeSat Robotic Assembly CubeSat Development Workshop 2020 Ezinne Uzo-Okoro, Mary Dahl, Emily Kiley, Christian Haughwout, Kerri Cahoy 1 Motivation: In-Space Small Satellite Assembly Why not build in space? GEO MEO LEO The standardization of electromechanical CubeSat components for compatibility with CubeSat robotic assembly is a key gap 2 Goal: On-Demand On-Orbit Assembled CubeSats LEO Mission Key Phases ➢ Ground Phase: Functional electro/mechanical prototype ➢ ISS Phase: Development and launch of ISS flight unit locker, with CubeSat propulsion option ➢ Free-Flyer Phase: Development of agile free-flyer “locker” satellite with robotic arms to assemble and deploy rapid response CubeSats GEO ➢ Constellation Phase: Development of strategic constellation of agile free-flyer “locker” satellites with robotic Internal View of ‘Locker’ Showing Robotic Assembly arms to autonomously assemble and deploy CubeSats IR Sensors VIS Sensors RF Sensors Propulsion Mission Overview Mission Significance • Orbit-agnostic lockers deploy on-demand robot-assembled CubeSats Provides many CubeSat configurations responsive to • ‘Locker’ is mini-fridge-sized spacecraft with propulsion rapidly evolving space needs capability ✓ Flexible: Selectable sensors and propulsion • Holds robotic arms, sensor, and propulsion modules for ✓ Resilient: Dexterous robot arms for CubeSat assembly 1-3U CubeSats without humans-in-the-loop on Earth and on-orbit Build • Improve response: >30 days to ~hours custom-configured CubeSats on Earth or in space saving -
Astrobiology in Low Earth Orbit
The O/OREOS Mission – Astrobiology in Low Earth Orbit P. Ehrenfreund1, A.J. Ricco2, D. Squires2, C. Kitts3, E. Agasid2, N. Bramall2, K. Bryson4, J. Chittenden2, C. Conley5, A. Cook2, R. Mancinelli4, A. Mattioda2, W. Nicholson6, R. Quinn7, O. Santos2, G. Tahu5, M. Voytek5, C. Beasley2, L. Bica3, M. Diaz-Aguado2, C. Friedericks2, M. Henschke2, J.W. Hines2, D. Landis8, E. Luzzi2, D. Ly2, N. Mai2, G. Minelli2, M. McIntyre2, M. Neumann3, M. Parra2, M. Piccini2, R. Rasay3, R. Ricks2, A. Schooley2, E. Stackpole2, L. Timucin2, B. Yost2, A. Young3 1Space Policy Institute, Washington, DC, USA [email protected], 2NASA Ames Research Center, Moffett Field, CA, USA, 3Robotic Systems Laboratory, Santa Clara University, Santa Clara, CA, USA, 4Bay Area Environmental Research Institute, Sonoma, CA, USA, 5NASA Headquarters, Washington DC, USA, 6University of Florida, Gainesville, FL, USA, 7SETI Institute, Mountain View, CA, USA, 8Draper Laboratory, Cambridge, MA, USA Abstract. The O/OREOS (Organism/Organic Exposure to Orbital Stresses) nanosatellite is the first science demonstration spacecraft and flight mission of the NASA Astrobiology Small- Payloads Program (ASP). O/OREOS was launched successfully on November 19, 2010, to a high-inclination (72°), 650-km Earth orbit aboard a US Air Force Minotaur IV rocket from Kodiak, Alaska. O/OREOS consists of 3 conjoined cubesat (each 1000 cm3) modules: (i) a control bus, (ii) the Space Environment Survivability of Living Organisms (SESLO) experiment, and (iii) the Space Environment Viability of Organics (SEVO) experiment. Among the innovative aspects of the O/OREOS mission are a real-time analysis of the photostability of organics and biomarkers and the collection of data on the survival and metabolic activity for micro-organisms at 3 times during the 6-month mission. -
Highlights in Space 2010
International Astronautical Federation Committee on Space Research International Institute of Space Law 94 bis, Avenue de Suffren c/o CNES 94 bis, Avenue de Suffren UNITED NATIONS 75015 Paris, France 2 place Maurice Quentin 75015 Paris, France Tel: +33 1 45 67 42 60 Fax: +33 1 42 73 21 20 Tel. + 33 1 44 76 75 10 E-mail: : [email protected] E-mail: [email protected] Fax. + 33 1 44 76 74 37 URL: www.iislweb.com OFFICE FOR OUTER SPACE AFFAIRS URL: www.iafastro.com E-mail: [email protected] URL : http://cosparhq.cnes.fr Highlights in Space 2010 Prepared in cooperation with the International Astronautical Federation, the Committee on Space Research and the International Institute of Space Law The United Nations Office for Outer Space Affairs is responsible for promoting international cooperation in the peaceful uses of outer space and assisting developing countries in using space science and technology. United Nations Office for Outer Space Affairs P. O. Box 500, 1400 Vienna, Austria Tel: (+43-1) 26060-4950 Fax: (+43-1) 26060-5830 E-mail: [email protected] URL: www.unoosa.org United Nations publication Printed in Austria USD 15 Sales No. E.11.I.3 ISBN 978-92-1-101236-1 ST/SPACE/57 *1180239* V.11-80239—January 2011—775 UNITED NATIONS OFFICE FOR OUTER SPACE AFFAIRS UNITED NATIONS OFFICE AT VIENNA Highlights in Space 2010 Prepared in cooperation with the International Astronautical Federation, the Committee on Space Research and the International Institute of Space Law Progress in space science, technology and applications, international cooperation and space law UNITED NATIONS New York, 2011 UniTEd NationS PUblication Sales no. -
The O/OREOS Mission—Astrobiology in Low Earth Orbit
Acta Astronautica 93 (2014) 501–508 Contents lists available at ScienceDirect Acta Astronautica journal homepage: www.elsevier.com/locate/actaastro The O/OREOS mission—Astrobiology in low Earth orbit P. Ehrenfreund a,n, A.J. Ricco b, D. Squires b, C. Kitts c, E. Agasid b, N. Bramall b, K. Bryson d, J. Chittenden b, C. Conley e, A. Cook b, R. Mancinelli d, A. Mattioda b, W. Nicholson f, R. Quinn g, O. Santos b,G.Tahue,M.Voyteke, C. Beasley b,L.Bicac, M. Diaz-Aguado b, C. Friedericks b,M.Henschkeb,D.Landish, E. Luzzi b,D.Lyb, N. Mai b, G. Minelli b,M.McIntyreb,M.Neumannc, M. Parra b, M. Piccini b, R. Rasay c,R.Ricksb, A. Schooley b, E. Stackpole b, L. Timucin b,B.Yostb, A. Young c a Space Policy Institute, Washington DC, USA b NASA Ames Research Center, Moffett Field, CA, USA c Robotic Systems Laboratory, Santa Clara University, Santa Clara, CA, USA d Bay Area Environmental Research Institute, Sonoma, CA, USA e NASA Headquarters, Washington DC, USA f University of Florida, Gainesville, FL, USA g SETI Institute, Mountain View, CA, USA h Draper Laboratory, Cambridge, MA, USA article info abstract Article history: The O/OREOS (Organism/Organic Exposure to Orbital Stresses) nanosatellite is the first Received 19 December 2011 science demonstration spacecraft and flight mission of the NASA Astrobiology Small- Received in revised form Payloads Program (ASP). O/OREOS was launched successfully on November 19, 2010, to 22 June 2012 a high-inclination (721), 650-km Earth orbit aboard a US Air Force Minotaur IV rocket Accepted 18 September 2012 from Kodiak, Alaska.