Chapter 23 Space Communications
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Amateur-Satellite Service
Amateur-Satellite Service 1 26/11/2012 Some facts about the amateur-satellite service • Began in 1961 • Pioneered low-cost satellite technology • First privately funded space satellites • First satellite search & rescue (OSCAR 6 & 7) • First inter-satellite transmissions • Early tele-medicine transmissions • Pioneered distributed engineering 2 26/11/2012 Amateur-satellite organizations (by country) • Argentina AMSAT-LU • Australia AMSAT-Australia • Austria AMSAT-OE • Bermuda AMSAT-BDA • Brazil BRAMSAT • Chile AMSAT-CE • Denmark AMSAT-OZ • Germany AMSAT-DL • Finland AMSAT-OH • France AMSAT-France • Israel AMSAT-Israel • Italy AMSAT-Italia 3 26/11/2012 Amateur-satellite organizations (by country)…continued • Korea KITSAT Project • Mexico AMSAT-Mexico • New Zealand AMSAT-ZL • Qatar AMSAT-Qatar • Japan JAMSAT • North America AMSAT-NA • Russia AMSAT-R • South Africa AMSAT-SA • Spain AMSAT-URE • Sweden AMSAT-Sweden • United Kingdom AMSAT-UK • USA, Canada AMSAT-NA 4 26/11/2012 Co-operation with universities to develop & construct amateur-satellites Amateur satellites have been designed and constructed by university students with the help of local amateurs and amateur-satellite organizations. Some examples: ◊ Stellenbosch University (South Africa) ◊ University of Surrey (UK) ◊ University of Mexico ◊ Weber State University (USA) 5 26/11/2012 Student satellite project 6 26/11/2012 Orbiting Satellite Carrying Amateur Radio (OSCARs) Early satellite projects • April 1959 Concept of a satellite built by and for amateurs • OSCAR I Dec 1961 - Jan 1962, -
Fig. 1 System Block Diagram
SSC13-II-2 300 Mbps Downlink Communications from 50kg Class Small Satellites Hirobumi Saito Japan Aerospace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS) Naohiko Iwakiri , Atsushi Tomiki, Takahide Mizuno, Hiromi Watanabe, Tomoya Fukami, Osamu Shigeta, Hitoshi Nunomura, Yasuaki Kanda , Kaname Kojima, Takahiro Shinke, and Toshiki Kumazawa Contents 1. Purpose : 320Mbps down link for small sat 2. Onboard segment: high effiency transmitter. small antenna 3. Ground segment : 3.8m S/X band antenna powerful receiver 4. Total simulation : SPW software + link calculation 5. EM test finished. FM maunfacturing now. 6. On-orbit demonstration : 2014 with 50kg sat. Limits of Small Satellites for Earth Observations • Mass Limit(<100kg), Power Limit (<100W) ー Telescope Resolution (5m vs. 0.5m) ー Down link Speed (10Mbps vs. 800Mbps) ・ What is the Bottleneck of Down Link Speed ? - Power ! Down link bit rate VS. satellite mass for low earth orbit. 1.0E+12 ) 1T bps TerraSAR-X Hodoyoshi #4 ( (2014) WorldView1 1.0E+09 EROS-B Formosat2 GeoEye-1 1G Orbview3Kompsat2 ALOS Orbview4 JERS1 EOS-PM1 Ikonos2 Radarsat1 TopSat QuickBird2 ERSEnvisat1 Lewis Landsat ADEOS Spot RazakSat-1 UK-DMC2 MOS 1B MOS 1A Terra IRS-1A,1B,1C UK-DMC1 EROS-A AS1000 AlSat Orbview2 TRMM 1.0E+06 データ伝送速度 1M EarlyBird MicroLabSat Cute-1.7 PRISM TOMS-EP Cute-I Down Link Bit Rate(bps) Link Down Bit 観測衛星の 1.0E+031K 1 10 100 1000 10000 Satellite衛星質量 Mass(kg) (kg) High Speed Down Link for Small Sat • Purpose of This Research: High-speed Down Link System with Low Power Consumption ―Goal 50kg Sat @600km orbit DC power <20W, 320Mbps Small Ground Antenna < 4m System block diagram of high-data-rate downlink. -
Development of Earth Station Receiving Antenna and Digital Filter Design Analysis for C-Band VSAT
INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 3, ISSUE 6, JUNE 2014 ISSN 2277-8616 Development of Earth Station Receiving Antenna and Digital Filter Design Analysis for C-Band VSAT Su Mon Aye, Zaw Min Naing, Chaw Myat New, Hla Myo Tun Abstract: This paper describes the performance improvement of C-band VSAT receiving antenna. In this work, the gain and efficiency of C-band VSAT have been evaluated and then the reflector design is developed with the help of ICARA and MATLAB environment. The proposed design meets the good result of antenna gain and efficiency. The typical gain of prime focus parabolic reflector antenna is 30 dB to 40dB. And the efficiency is 60% to 80% with the good antenna design. By comparing with the typical values, the proposed C-band VSAT antenna design is well optimized with gain of 38dB and efficiency of 78%. In this paper, the better design with compromise gain performance of VSAT receiving parabolic antenna using ICARA software tool and the calculation of C-band downlink path loss is also described. The particular prime focus parabolic reflector antenna is applied for this application and gain of antenna, radiation pattern with far field, near field and the optimized antenna efficiency is also developed. The objective of this paper is to design the downlink receiving antenna of VSAT satellite ground segment with excellent gain and overall antenna efficiency. The filter design analysis is base on Kaiser window method and the simulation results are also presented in this paper. Index Terms: prime focus parabolic reflector antenna, satellite, efficiency, gain, path loss, VSAT. -
Supplemental Information for an Amateur Radio Facility
COMMONWEALTH O F MASSACHUSETTS C I T Y O F NEWTON SUPPLEMENTAL INFORMA TION FOR AN AMATEUR RADIO FACILITY ACCOMPANYING APPLICA TION FOR A BUILDING PERMI T, U N D E R § 6 . 9 . 4 . B. (“EQUIPMENT OWNED AND OPERATED BY AN AMATEUR RADIO OPERAT OR LICENSED BY THE FCC”) P A R C E L I D # 820070001900 ZON E S R 2 SUBMITTED ON BEHALF OF: A LEX ANDER KOPP, MD 106 H A R TM A N ROAD N EWTON, MA 02459 C ELL TELEPHONE : 617.584.0833 E- MAIL : AKOPP @ DRKOPPMD. COM BY: FRED HOPENGARTEN, ESQ. SIX WILLARCH ROAD LINCOLN, MA 01773 781/259-0088; FAX 419/858-2421 E-MAIL: [email protected] M A R C H 13, 2020 APPLICATION FOR A BUILDING PERMIT SUBMITTED BY ALEXANDER KOPP, MD TABLE OF CONTENTS Table of Contents .............................................................................................................................................. 2 Preamble ............................................................................................................................................................. 4 Executive Summary ........................................................................................................................................... 5 The Telecommunications Act of 1996 (47 USC § 332 et seq.) Does Not Apply ....................................... 5 The Station Antenna Structure Complies with Newton’s Zoning Ordinance .......................................... 6 Amateur Radio is Not a Commercial Use ............................................................................................... 6 Permitted by -
[AMSAT-F] ANS Bulletin Francophone 302
F6HBN-83FR De: [email protected] de la part de JC-Aveni [[email protected]] Envoyé: dimanche 28 octobre 2012 19:58 À: AMSAT- F; Amsat Francophone; Bernard Pidoux; bernard Pidoux Objet: [AMSAT-F] ANS Bulletin Francophone 302 Indicateur de suivi: Assurer un suivi État de l'indicateur: Rouge SB SAT@FRANCA $F-ANS-302-1 ANS bulletin en français 302-1 AMSAT NEWS SERVICE BULLETIN ANS 302 Capture sur Internet et traduction par TK5GH. Information sur l’AMSAT-NA dispo à l’URL : http://www.amsat.org (ou via) AMSAT-NA 850 Sligo Avenue, Suite 600 Silver Spring, Marylet 20910-4703 TEL : 301-589-6062 888-322-6728 FAX : 301-608-3410 Pour s’abonner à la liste du forum voyez à l’URL : http://www.amsat.org/amsat/listserv/menu.html =============================================================== L’ANS est un bulletin hebdomadaire libre d’accès issu de l’AMSAT North America le Radio Amateur Satellite Corporation. Il regroupe toutes les informations des acteurs de cette activité qui partagent le même intérêt pour les projets, les constructions, les lancements, et les opérations sur les satellites radio amateurs. ================================================================ Dans cette édition on trouvera : * Election des directeurs AMSAT 2012 * Fox-1 Satellite en développement * AMSAT News Service a un nouvel éditeur : EMike McCardel, KC8YLD * Japan PRISM Satellite commence son service Ham en AX.25 Store-and-Forward * WS4FSM hôte d'un des plus grand contact ARISS par le nombre d'auditeurs * Raport dispo sur le projet japonnais de sat UNISEC Satellite * 3 cartes FUNcube-2 pour le Clyde Space for UKube-1 Nanosatellite * Corée du Sud, Brésil, Ukraine prêts au vol orbital * NASA Accepte des applications d'élèves pour le HASP Ballon stratos 1 * ARISS Statut du 22 octobre 2012 ANS-302 AMSAT News Service Weekly Bulletins ------------------------------------------------------------------------ AMSAT Board Elects Senior Officers for 2012 Rappel de la liste des Dirigeants importants de la direction de l'AMSAT-NA avant l'ouverture des rencontres du 25 octobre au Symposium. -
A Review Paper on Microwave Transmission Using Reflector Antennas
International Journal of Scientific & Engineering Research Volume 8, Issue 10, October-2017 ISSN 2229-5518 251 A Review Paper on Microwave Transmission using Reflector Antennas Sandeep Kumar Singh [1],Sumi Kumari[2] Sr. Lecturer, Dept. of ECE, JBIT, Dehradun [1], Asst. Professor, Dept. of ECE, VGIET, Jaipur[2] [email protected][1] [email protected][2] Abstract: The conventional optimization problem of the beamed microwave energy transmission system is considered. The criterion of maximum efficiency of power intercept is parabolic function of distribution on the transmitting antenna. It is shown that under such a condition of amplitude distribution becomes more uniform than as the unconditional optimization. In this case, we can substantially increase the power radiated by the transmitting antenna losing the power intercept no more than 2%. Keywords: Parabolic Reflector Antenna, Radio Relay, Antenna Gain, Cassegrain Feed. I.INTRODUCTION limited to line of sight propagation; they cannot pass around hills or mountains as lower frequency radio waves can. Microwave radiation is generally defined as that electromagnetic radiation having wavelengths between radio waves and infrared III.ANTENNA radiation. Microwave radiation can be forced to travel in specially designed waveguides. Microwave radiation can be transmitted An antenna (or aerial) is an electrical device which converts through space or through the atmosphere in a microwave beam electric currents into radio waves, and vice versa. It is usually used from a microwave antenna and the microwave energy can be with a radio transmitter or radio receiver. In transmission, a radio collected with a microwave antenna. Microwave antennas are used transmitter applies an oscillating radio frequency electric current to for transmitting and receiving microwave radiation. -
Nova Tune a Radio Tuning Addition to Nova for Windows
Nova_Tune A radio tuning addition to Nova for Windows 1 Table of Contents ? System requirements .....................................................................................2 ? List of radios supported................................................................................. 2 ? Hardware .......................................................................................................3 o Front panel.........................................................................................4 o Rear panel......................................................................................... 5 o Inside .................................................................................................6 ? Software ......................................................................................................11 o Setup................................................................................................11 ? Table of satellite frequencies .......................................................................17 Author Manufacturing International Sole Distributor Terrig Evans, ZL2JTX Michael R. Owen, W9IP David H Lamont, ZL2AMD E.T. Electronics Northern Lights Software Associates http://homepages.paradise.net.nz/lamontd/ Napier, New Zealand [email protected] [email protected] [email protected] http://www.nlsa.com Caveat The designers of this hardware and software disclaim any and all liability for any direct, indirect, incidental, consequential (including loss of profits) or punitive charges whether based -
Choosing a Ham Radio
Choosing a Ham Radio Your guide to selecting the right equipment Lead Author—Ward Silver, NØAX; Co-authors—Greg Widin, KØGW and David Haycock, KI6AWR • About This Publication • Types of Operation • VHF/UHF Equipment WHO NEEDS THIS PUBLICATION AND WHY? • HF Equipment Hello and welcome to this handy guide to selecting a radio. Choos- ing just one from the variety of radio models is a challenge! The • Manufacturer’s Directory good news is that most commercially manufactured Amateur Radio equipment performs the basics very well, so you shouldn’t be overly concerned about a “wrong” choice of brands or models. This guide is intended to help you make sense of common features and decide which are most important to you. We provide explanations and defini- tions, along with what a particular feature might mean to you on the air. This publication is aimed at the new Technician licensee ready to acquire a first radio, a licensee recently upgraded to General Class and wanting to explore HF, or someone getting back into ham radio after a period of inactivity. A technical background is not needed to understand the material. ABOUT THIS PUBLICATION After this introduction and a “Quick Start” guide, there are two main sections; one cov- ering gear for the VHF and UHF bands and one for HF band equipment. You’ll encounter a number of terms and abbreviations--watch for italicized words—so two glossaries are provided; one for the VHF/UHF section and one for the HF section. You’ll be comfortable with these terms by the time you’ve finished reading! We assume that you’ll be buying commercial equipment and accessories as new gear. -
Design and Construction of a Cost-Effective Parabolic Satellite Dish Using Available Local Materials
International Journal of Advanced Materials Research Vol. 5, No. 3, 2019, pp. 46-52 http://www.aiscience.org/journal/ijamr ISSN: 2381-6805 (Print); ISSN: 2381-6813 (Online) Design and Construction of a Cost-effective Parabolic Satellite Dish Using Available Local Materials Gbadamosi Ramoni Adewale * Faculty of Science, National Open University of Nigeria, Akure, Nigeria Abstract Communication through satellite is very important at this information age. It can provide complete global coverage. It can be used to send and receive information in remote area where other technology may fail. Communication signals are sent in form of electromagnetic signal which are intercepted by the parabolic dish. The offered high-efficiency and high-gain by the parabolic dish makes it appropriate for direct broadcast satellite reception. However, parabolic dish procurement in developing countries is very expensive. This makes it to be unaffordable to majority of the masses. This paper focuses on design and construction of cheap parabolic satellite dish using local readily available materials. An indigenous technology is exploited to achieve the goal of this work. The paper describes from the scratch, how to design and construct a parabolic dish that can be used to intercept electromagnetic signals from the satellite stationed in the space. The proposed design approach offers a number of advantages such as cost-effectiveness and high simplicity. These are due to the fact that; it can be effectively developed with the easily available materials. Besides, it development demands neither special/long time training nor skill. Thus, both technical and non-technical personnel with minimal training can construct it either for commercial and/or personal use. -
A B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
A B 1 Name of Satellite, Alternate Names Country of Operator/Owner 2 AcrimSat (Active Cavity Radiometer Irradiance Monitor) USA 3 Afristar USA 4 Agila 2 (Mabuhay 1) Philippines 5 Akebono (EXOS-D) Japan 6 ALOS (Advanced Land Observing Satellite; Daichi) Japan 7 Alsat-1 Algeria 8 Amazonas Brazil 9 AMC-1 (Americom 1, GE-1) USA 10 AMC-10 (Americom-10, GE 10) USA 11 AMC-11 (Americom-11, GE 11) USA 12 AMC-12 (Americom 12, Worldsat 2) USA 13 AMC-15 (Americom-15) USA 14 AMC-16 (Americom-16) USA 15 AMC-18 (Americom 18) USA 16 AMC-2 (Americom 2, GE-2) USA 17 AMC-23 (Worldsat 3) USA 18 AMC-3 (Americom 3, GE-3) USA 19 AMC-4 (Americom-4, GE-4) USA 20 AMC-5 (Americom-5, GE-5) USA 21 AMC-6 (Americom-6, GE-6) USA 22 AMC-7 (Americom-7, GE-7) USA 23 AMC-8 (Americom-8, GE-8, Aurora 3) USA 24 AMC-9 (Americom 9) USA 25 Amos 1 Israel 26 Amos 2 Israel 27 Amsat-Echo (Oscar 51, AO-51) USA 28 Amsat-Oscar 7 (AO-7) USA 29 Anik F1 Canada 30 Anik F1R Canada 31 Anik F2 Canada 32 Apstar 1 China (PR) 33 Apstar 1A (Apstar 3) China (PR) 34 Apstar 2R (Telstar 10) China (PR) 35 Apstar 6 China (PR) C D 1 Operator/Owner Users 2 NASA Goddard Space Flight Center, Jet Propulsion Laboratory Government 3 WorldSpace Corp. Commercial 4 Mabuhay Philippines Satellite Corp. Commercial 5 Institute of Space and Aeronautical Science, University of Tokyo Civilian Research 6 Earth Observation Research and Application Center/JAXA Japan 7 Centre National des Techniques Spatiales (CNTS) Government 8 Hispamar (subsidiary of Hispasat - Spain) Commercial 9 SES Americom (SES Global) Commercial -
Custom Products
Back to MiMixxerer Home Page CUSTOM PRODUCTS Table of Contents Introduction Detailed Data Sheets Questions & Answers 100 Davids Drive • Hauppauge, NY 11788 • 631-436-7400 • Fax: 631-436-7430 • www.miteq.com TABLETABLE OF CONTENTS OF CONTENTS (CONT.) CONTENTS CONTENTS MULTIPLIERS (CONT.) CUSTOM PRODUCTS Detailed Data Sheets Detailed Data Sheets (Cont.) Passive Frequency Doublers Low-Noise Block Downconverter Octave Bandwidth Four-Channel Downconverter Module Millimeter Five-Channel Downconverter Module CONTENTSMultioctave Bandwidth with Input RF Switch/Limiter CUSTOMDrop-In PRODUCTS and LO Amplifier/Divider ActiveCONTENTS Frequency Doublers Block Diagram of MITEQ 5-Channel Gain GeneralNarrow and Octave Bandwidth and Phase-Matched Front-End QuickIntDrop-InTION Reference Applications of Five-Channel Front Ends Millimeter Four-Channel 1 to 18 GHz TypicalMultioctaveCorporate Subsystem Bandwidth Overview Worksheet Image Rejection Downconverter Millimeter Three-Channel Mixer Amplifier UsefulActiveTechnology Multiplier System Assemblies Formulas Overview Direct Microwave Digital I/Q DetailedX2Specification Data Sheets Definitions Modulator System Millimeter Integrated Upconverter and Three-ChannelX3Quality Assurance LNA Downconverter Module Power Amplifier Low-NoiseMTBFMillimeter Calculations Block Downconverter Block Downconverter X4 Low-Noise Block Converter Four-ChannelManufacturingMillimeter Downconverter Flow Diagrams Module X-Band Low-Noise Block Converter Five-ChannelX5Device 883 DownconverterScreening Module Switched Power Amplifier Assembly -
Analysis and Performance of Antenna Baluns
Analysis and Performance of Antenna Baluns Lotter Kock Thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Electronic Engineering at the University of Stellenbosch Study Leader: Prof. K.D. Palmer April2005 Stellenbosch University http://scholar.sun.ac.za - Declaration - "I, the undersigned, hereby declare that the work contained in this thesis is my own original work and that I have not previously in its entirety or in part submitted it at any university for a degree." Stellenbosch University http://scholar.sun.ac.za Abstract Data transmission plays a cardinal role in today's society. The key element of such a system is the antenna which is the interface between the air and the electronics. To operate optimally, many antennas require baluns as an interface between the electronics and the antenna. This thesis presents the problem definition, analysis and performance characterization of baluns. Examples of existing baluns are designed, computed and measured. A comparison is made between the analyzed baluns' results and recommendations are made. 2 Stellenbosch University http://scholar.sun.ac.za Opsomming Data transmissie is van kardinale belang in vandag se samelewing. Antennas is die voegvlak tussen die lug en die elektronika en vorm dus die basis van die sisteme. Vir baie antennas word 'n balun, wat die elektronika aan die antenna koppel, benodig om optimaal te funktioneer. Die tesis omskryf die probleemstelling, analiese en 'n prestasie maatstaf vir baluns. Prakties word daar gekyk na huidige baluns se ontwerp, simulasie, en metings. Die resultate word krities vergelyk en aanbevelings word gemaak. 3 Stellenbosch University http://scholar.sun.ac.za Acknowledgements First and foremost, I would like to thank God for affording me this life.