Repertoire Des Satellites Artificiels Lances En 1974
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NTIA Technical Report TR-78-9 Current Activities in Small Earth
NTtA-REPORT -78-9 Current Activities in Small Earth Terminal Satellite Domestic Telecommunications Paul I. Wells u.s. DEPARTMENT OF COMMERCE Juanita M. Kreps, Secretary Henry Geller, Assistant Secretary for Communications and Information August 1978 TABLE OF CONTENTS Page LIST OF FIGURES v LIST OF TABLES vi ABSTRACT 1 1. INTRODUCTION. 1 2 . DOMESTIC S,ATELLITES - PRESENT AND PLANNED 2 2.1. Domestic Satellite Technical Characteristics 6 2.1.1. Western Union WESTAR Satellite 6 2.1.2. RCA Americom SATCOM Satellite 6 2.1.3. Comsat General COMSTAR Satellite 8 2.1.4. S~tellite Business Systems ~pacecraft 10 2.2. Domestic Satellite Channel Capacity 10 2.3. Multiple Access in Satellite Communications 11 3. DOMESTIC EARTH STATIONS - PRESENT AND PLANNED 14 3.1. Domesti~ Earth Station Applications 15 3 .1.1. Point~to-poi,nt Communication Services 15 3 .1. 2. Point-'to-Multipoint Communication Services 16 3.2. Domestic Earth Stati6rt Facilities 17 3.3. Domestic Eart'h Station Equipment Costs 19 4. PREPARATION FOR THE GENERAL WARC IN 1979 31 4.1. Allocations for Fixed- and Broad~asting- Satellite Service 36 4.1.1. 2.50 GHz to 2.69 GHz 52 4.1.2. 3.4 GHz to 3.7 GHZ 56 4.1.3. 3.70 GHz to 4.20 GHz 57 4 . 1. 4. 4.40 GHz to 4.70 GHz 57 4.1.5. 5.725 GHz to 5.925 GHz 58 4.1.6. 7.25 GHz to 7.75 GHz 58 4.1.7. 7.90 GHz to 8.40 GHz 58 4.1.8. -
On the Spectra of Gamma-Ray Bursts at High Energies
University of New Hampshire University of New Hampshire Scholars' Repository Doctoral Dissertations Student Scholarship Spring 1986 ON THE SPECTRA OF GAMMA-RAY BURSTS AT HIGH ENERGIES STEVEN MICHAEL MATZ University of New Hampshire, Durham Follow this and additional works at: https://scholars.unh.edu/dissertation Recommended Citation MATZ, STEVEN MICHAEL, "ON THE SPECTRA OF GAMMA-RAY BURSTS AT HIGH ENERGIES" (1986). Doctoral Dissertations. 1483. https://scholars.unh.edu/dissertation/1483 This Dissertation is brought to you for free and open access by the Student Scholarship at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. INFORMATION TO USERS This reproduction was made from a copy of a manuscript sent to us for publication and microfilming. While the most advanced technology has been used to pho tograph and reproduce this manuscript, the quality of the reproduction is heavily dependent upon the quality of the material submitted. Pages in any manuscript may have indistinct print. In all cases the best available copy has been filmed. The following explanation of techniques is provided to help clarify notations which may appear on this reproduction. 1. Manuscripts may not always be complete. When it is not possible to obtain missing pages, a note appears to indicate this. 2. When copyrighted materials are removed from the manuscript, a note ap pears to indicate this. 3. Oversize materials (maps, drawings, and charts) are photographed by sec tioning the original, beginning at the upper left hand comer and continu ing from left to right in equal sections with small overlaps. -
A Search for Anomalous Tails of Short-Period Comets
Probable Optical Identification of LMC X-4 Claude Chevalier and Sergio A. I/ovaisky, Observatoire de Meudon Among the five X-ray sources known to exist in the Large of the sky by the UHURU satellite; it was also detected by Magellanic Cloud, none has up to now been positively the Ariel 5 and SAS-3 satellites and there is now definite idenlified with an optical object. However, this situation evidence for variability, including flares. The rotating mo may change in the near future as X-ray satellites point to dulation collimator system aboard SAS-3 determined the the source known as LMC X-4. The existence of this source position of LMC X-4 to one are minute. Inside the error box was announced in 1972 as a result of the first X-ray survey a large number of stars are visible on the ESO ass plate (field 86). Very deep objective-prism Schmidt plates taken at Cerro Tololo by N. Sanduleak and A. G. D. Philip showed an OS star near the centre of the error box. A spectrum of DELTA 13 l Me x- 'I pr; 1 ,llt1U D this star was taken by E. Maurice in January 1977 with the l' 3i'1~.(Jb Echelec spectrograph of the 1.5-m telescope at La Si lIa; it showed the star to be indeed an early-type luminous ob 3.3 ject. Du ri ng our runs at La Silla in February and March 1977 ......,', ......,', we started a systematic study of this object. One of us (C.C.) ,..... -
Introduction to Satellite Communication 3Rd Edition
Introduction to Satellite Communication Third Edition For a listing of recent titles in the Artech House Space Application Series, turn to the back of this book. Introduction to Satellite Communication Third Edition Bruce R. Elbert Library of Congress Cataloging-in-Publication Data A catalog record for this book is available from the U.S. Library of Congress. British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library. ISBN-13: 978-1-59693-210-4 Cover design by Yekaterina Ratner 2008 ARTECH HOUSE, INC. 685 Canton Street Norwood, MA 02062 All rights reserved. Printed and bound in the United States of America. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the publisher. All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Artech House cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark. 10987654321 Contents Preface xi CHAPTER 1 Fundamentals of Satellite Systems 1 1.1 Basic Characteristics of Satellites 1 1.1.1 Advantages of Satellite Communication 7 1.1.2 Use of Microwave Frequencies 11 1.1.3 Digital Transmission, Compression, and Routing 12 1.1.4 Improved Space Platforms and Launching Systems 13 1.1.5 Integration with Terrestrial -
The Atmospheric Remote-Sensing Infrared Exoplanet Large-Survey
ariel The Atmospheric Remote-Sensing Infrared Exoplanet Large-survey Towards an H-R Diagram for Planets A Candidate for the ESA M4 Mission TABLE OF CONTENTS 1 Executive Summary ....................................................................................................... 1 2 Science Case ................................................................................................................ 3 2.1 The ARIEL Mission as Part of Cosmic Vision .................................................................... 3 2.1.1 Background: highlights & limits of current knowledge of planets ....................................... 3 2.1.2 The way forward: the chemical composition of a large sample of planets .............................. 4 2.1.3 Current observations of exo-atmospheres: strengths & pitfalls .......................................... 4 2.1.4 The way forward: ARIEL ....................................................................................... 5 2.2 Key Science Questions Addressed by Ariel ....................................................................... 6 2.3 Key Q&A about Ariel ................................................................................................. 6 2.4 Assumptions Needed to Achieve the Science Objectives ..................................................... 10 2.4.1 How do we observe exo-atmospheres? ..................................................................... 10 2.4.2 Targets available for ARIEL .................................................................................. -
Extension of Upper Limit Servers and Spectral Analysis of the X-Ray Binary GRO J1744−28
Extension of Upper Limit Servers and spectral analysis of the X-ray binary GRO J1744−28 Master's Thesis in Physics Presented by Ole K¨onig Wednesday 31st July, 2019 Dr. Karl Remeis-Sternwarte & ECAP Friedrich-Alexander-Universit¨atErlangen-N¨urnberg Supervisor: Prof. Dr. J¨ornWilms Abstract This thesis is about applications in the field of X-ray astronomy. It is divided into a software development and data analysis part. The Upper Limit Servers allow the user to generate long-term lightcurves of X-ray sources. They combine historical data and calculate upper limits in real-time. A web-based front- end provides facile querying, plotting and downloading of the data. They utilize data from 12 satellites including current observatories such as XMM-Newton, back to ROSAT, Einstein, Ariel V and Uhuru. This enables the user to query 50 years of X-ray data and, for instance, study outburst behavior of transient sources. Part I of this thesis describes the software layout, database format, as well as nine X-ray missions, which I implemented. In particular, the implementation of catalog calls, image footprints, point spread functions, and vignetting is described. The count rate is converted to a flux by approximating the spectral shape with an absorbed power-law or black body. In order to outline possible applications of this software, I interpret four lightcurves. In the second part, the spectral analysis of the low-mass X-ray binary GRO J1744−28 is presented. The ∼29 ks data was taken with the Nuclear Spectroscopic Telescope Array (NuSTAR) in 2017 February, during the source's fourth reactivation phase after three years of quiescence. -
NASA Astronauts
PUBLISHED BY Public Affairs Divisio~l Washington. D.C. 20546 1983 IColor4-by-5 inch transpar- available free to information lead and sent to: Non-informstionmedia may obtain identical material for a fee through a photographic contractor by using the order forms in the rear of this book. These photqraphs are government publications-not subject to copyright They may not be used to state oiimply the endorsement by NASA or by any NASA employee of a commercial product piocess or service, or used in any other manner that might mislead. Accordingly, it is requested that if any photograph is used in advertising and other commercial promotion. layout and copy be submitted to NASA prior to release. Front cover: "Lift-off of the Columbia-STS-2 by artist Paul Salmon 82-HC-292 82-ti-304 r 8arnr;w u vowzn u)rorr ~ nsrvnv~~nrnno................................................ .-- Seasat .......................................................................... 197 Skylab 1 Selected Pictures .......................................................150 Skylab 2 Selected Pictures ........................................................ 151 Skylab 3 Selected Pictures ........................................................152 Skylab 4 Selected Pictures ........................................................ 153 SpacoColony ...................................................................183 Space Shuttle ...................................................................171 Space Stations ..................................................................198 \libinn 1 1f.d Apoiio 17/Earth 72-HC-928 72-H-1578 Apolb B/Earth Rise 68-HC-870 68-H-1401 Voyager ;//Saturn 81-HC-520 81-H-582 Voyager I/Ssturian System 80-HC-647 80-H-866 Voyager IN~lpiterSystem 79-HC-256 79-H-356 Viking 2 on Mars 76-HC-855 76-H-870 Apollo 11 /Aldrin 69-HC-1253 69-H-682 Apollo !I /Aldrin 69-HC-684 69-H-1255 STS-I /Young and Crippen 79-HC-206 79-H-275 STS-1- ! QTPLaunch of the Columbia" 82-HC-23 82-H-22 Major Launches NAME UUNCH VEHICLE MISSIONIREMARKS 1956 VANGUARD Dec. -
Riccardo Giacconi - a Hard Act to Follow
Riccardo Giacconi - a hard act to follow Ken Pounds University of Leicester in 1956 Riccardo was studying cosmic radiation with Beppo Occhialini in Milan …. as I graduated in Physics at UCL and accepted an Admiralty grant to join the new Rocket Group ant to join the new Rocket Group …….. initially with no rocket .… and no project …. but 3 more years of student life in London was attractive 1957 Skylark duly arrived • first flight at Woomera in February • payloads of 150 kg to 300 km (10 mins for x-ray observation) • Sun-pointing version from 1964 • PhD project : ‘Observing the Sun’s X-ray emission’ • data from flights in 1959 and 1960 1959 RG joined American Science and Engineering, a small military- space company in Cambridge 1960 I was ‘transferred’ to a Lectureship at Leicester to set up a Research Group to study‘solar and stellar X-ray sources’ with the Sun as the first (only realistic ?) target April 1962 Ariel 1 – exploring the ionosphere taking my solar spectrometer into orbit • Delta launch from Canaveral on 26 April All worked fine for 2.5 months, then … 9 July 1962 ‘The sky glowed red over Honolulu as X-rays from the Starfish nuclear test excited atomic oxygen in the atmosphere’ 2004 report to US Congress USAF 100Mt hydrogen bomb detonated 400 km above Johnstone Island in the Pacific swamping PCS detectors with radioactive debris! - also seriously damaging the spacecraft solar arrays DOD denials but then other satellites failed…. Riccardo was there! meanwhile – a few weeks earlier (12 June) – Herb Gursky led the ASE team at White Sands where…. -
Lanzamientos De Satelites Notificados En 1974
This electronic version (PDF) was scanned by the International Telecommunication Union (ITU) Library & Archives Service from an original paper document in the ITU Library & Archives collections. La présente version électronique (PDF) a été numérisée par le Service de la bibliothèque et des archives de l'Union internationale des télécommunications (UIT) à partir d'un document papier original des collections de ce service. Esta versión electrónica (PDF) ha sido escaneada por el Servicio de Biblioteca y Archivos de la Unión Internacional de Telecomunicaciones (UIT) a partir de un documento impreso original de las colecciones del Servicio de Biblioteca y Archivos de la UIT. (ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版(PDF版本)由国际电信联盟(ITU)图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union lanzamientos de satélites notificados en 1974 Esta lista integra los satélites artificiales lanzados en 1974; está basada en los datos proporcionados por las administraciones de telecomunicaciones, el Comité de Investigaciones Espaciales (COSPAR), el Goddard Space Flight Center (GSFC — Centro de Vuelos Espaciales Goddard) de la Administración Nacional de la Aeronáutica y del Espacio (NASA), de Estados Unidos, el Ministerio de Comunicaciones de la URSS, el Centre national d'études spatiales (CNES), de Francia, la Junta Internacional de Registro de Frecuencias (IFRB), uno de los cuatro organismos permanentes de la UIT, y en las informaciones publicadas por la prensa especializada. -
United States Space Program Firsts
KSC Historical Report 18 KHR-18 Rev. December 2003 UNITED STATES SPACE PROGRAM FIRSTS Robotic & Human Mission Firsts Kennedy Space Center Library Archives Kennedy Space Center, Florida Foreword This summary of the United States space program firsts was compiled from various reference publications available in the Kennedy Space Center Library Archives. The list is divided into four sections. Robotic mission firsts, Human mission firsts, Space Shuttle mission firsts and Space Station mission firsts. Researched and prepared by: Barbara E. Green Kennedy Space Center Library Archives Kennedy Space Center, Florida 32899 phone: [321] 867-2407 i Contents Robotic Mission Firsts ……………………..........................……………...........……………1-4 Satellites, missiles and rockets 1950 - 1986 Early Human Spaceflight Firsts …………………………............................……........…..……5-8 Projects Mercury, Gemini, Apollo, Skylab and Apollo Soyuz Test Project 1961 - 1975 Space Shuttle Firsts …………………………….........................…………........……………..9-12 Space Transportation System 1977 - 2003 Space Station Firsts …………………………….........................…………........………………..13 International Space Station 1998-2___ Bibliography …………………………………..............................…………........…………….....…14 ii KHR-18 Rev. December 2003 DATE ROBOTIC EVENTS MISSION 07/24/1950 First missile launched at Cape Canaveral. Bumper V-2 08/20/1953 First Redstone missile was fired. Redstone 1 12/17/1957 First long range weapon launched. Atlas ICBM 01/31/1958 First satellite launched by U.S. Explorer 1 10/11/1958 First observations of Earth’s and interplanetary magnetic field. Pioneer 1 12/13/1958 First capsule containing living cargo, squirrel monkey, Gordo. Although not Bioflight 1 a NASA mission, data was utilized in Project Mercury planning. 12/18/1958 First communications satellite placed in space. Once in place, Brigadier Project Score General Goodpaster passed a message to President Eisenhower 02/17/1959 First fully instrumented Vanguard payload. -
Astrophysical Spectroscopy
Astrophysical Spectroscopy Eugene Churazov Outline Astrophysically abundant elements Two examples of “Hydrogen” spectroscopy X-ray Astronomy Galaxy clusters and hot plasma LCDM Universe (Today) WMAP PLANCK PLANCK Abundance of elements in the Earth (crust) https://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth%27s_crust Abundance of elements in the Universe (today) https://en.wikipedia.org/wiki/Nucleosynthesis Origin of elements https://en.wikipedia.org/wiki/Nucleosynthesis#/media/File:Nucleosynthesis_periodic_table.svg Big Bang Nucleosynthesis Type Ia SN2014J Stellar evolution Type II SN1987A https://scioly.org/wiki/index.php/Astronomy/Stellar_Evolution GW170817 Typical abundances today (Sun photosphere) Element Abundance (by number) H 1.00e+0 1.00e+0 He 9.77e-2 9.77e-2 C 3.63e-4 3.98e-4 N 1.12e-4 1.00e-4 O 8.51e-4 8.51e-4 Ne 1.23e-4 1.29e-4 Na 2.14e-6 2.14e-6 Mg 3.80e-5 3.80e-5 Al 2.95e-6 2.95e-6 Si 3.55e-5 3.55e-5 S 1.62e-5 1.62e-5 https://en.wikipedia.org/wiki/Nuclear_binding_energy Cl 1.88e-7 1.88e-7 Ar 3.63e-6 4.47e-6 Ca 2.29e-6 2.29e-6 Cr 4.84e-7 4.84e-7 Fe 4.68e-5 3.24e-5 Ni 1.78e-6 1.78e-6 Co 8.60e-8 8.60e-8Our Universe is dominated by hydrogen +10% of He + small amount of other el. Hydrogen 21 cm line Hyperfine splitting of the ground state A ∼ 10−15 s−1 Lifetime ∼ 10 Myr kTs ≫ hν I = C × nH https://www.mpifr-bonn.mpg.de/pressreleases/2016/13 Other elements? 14N7 and 57Fe26; For instance, [H]-like N, or [Li]-like Fe? Hydrogen Ly� (1215 Å) Forest http://www.astro.ucla.edu/~wright/Lyman-alpha-forest.html Gunn-Peterson Trough -
Italy in Space 1946–1988
HSR-30 March 2003 Italy in Space 1946–1988 Michelangelo De Maria Dipartimento di Fisica Università di Roma – La Sapienza Lucia Orlando Gruppo di storia della fisica Università di Roma – La Sapienza Filippo Pigliacelli Università di Pavia a ii Acknowledgements The authors would like to thank Lorenza Sebesta and Maria Pia Bumbaca for revising drafts and for their helpful suggestions. Abbreviations The following abbreviations were used in the footnotes: AA for “Archivio Amaldi, Dipartimento di Fisica, Università di Roma 'La Sapienza'”; ACS for 'Archivio Centrale dello Stato'. The archival references for the holdings of the Archivio Centrale dello Stato are referred to the deposit inventory (e.g., the list of documents of the CNR archives, lodged in the ACS). Title HSR-30, Italy in Space, 1946–1988 Published by ESA Publications Division ESTEC, Postbus 299 2200 AG Noordwijk The Netherlands Editor R.A. Harris Price €10 ISSN 1683-4704 ISBN 92-9092-539-6 Copyright ©2003 The European Space Agency Printed in The Netherlands iii Contents 1 The Origins: From Cosmic-ray Physics to Space Research (1946–1958)....................1 1.1 Scientific research and the political situation.............................................................1 1.2 First initiatives: Edoardo Amaldi and cosmic-ray research (1946–1952)..................1 1.3 Luigi Broglio and the initial developments in the rocketry field (1952–1957)..........2 1.4 The International Geophysical Year (1957–1958) .....................................................3 2 Italy and International