Monitoring Times 2000 INDEX
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Cetiie B Tia Nature Red Acted
Probabilistic Methods for Systems Engineering with Application to Nanosatellite Laser Communications by Emily B. Clements Submitted to the Department of Aeronautics and Astronautics in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY June 2018 Massachusetts Institute of Technology 2018. All rights reserved. Autholr Signature redacted (J Department of Aeronautics and Astronautics May 24,2018 Cetiie b tianature red acted Kerri L. Cahoy Associate Professor of Aeronautics and Astronautics red acted Thesis Supervisor Certified by ... Signatu re ........................ David 0. Caplan Senior Staff, MIT Lincoln Laboratory Certified by, S ignature redacted Jeffrey A. Mendenhall Lincoln Laboratory C ignature red acted Senior Staff, MIT Certified by. ................................... David W. Miller Jerome Hunsaker Professor of Aeronauticq and Astronautics Accepted by......... .................. Signature redacted MASSACHUSETTS INSTITUTE Hamsa Balakrishnan OF TECHNOLOGY Associate Professor of Aeronautics and Astronautics JUN 28 2018 Chair, Graduate Program Committee LIBRARIES ARCHIVES 2 Probabilistic Methods for Systems Engineering with Application to Nanosatellite Laser Communications by Emily B. Clements Submitted to the Department of Aeronautics and Astronautics on May 24, 2018, in partial fulfillment of the requirements for the degree of Doctor of Philosophy Abstract Risk-tolerant platforms such as nanosatellites may be able to accept moderate perfor- mance uncertainty -
High Frequency Communications – an Introductory Overview
High Frequency Communications – An Introductory Overview - Who, What, and Why? 13 August, 2012 Abstract: Over the past 60+ years the use and interest in the High Frequency (HF -> covers 1.8 – 30 MHz) band as a means to provide reliable global communications has come and gone based on the wide availability of the Internet, SATCOM communications, as well as various physical factors that impact HF propagation. As such, many people have forgotten that the HF band can be used to support point to point or even networked connectivity over 10’s to 1000’s of miles using a minimal set of infrastructure. This presentation provides a brief overview of HF, HF Communications, introduces its primary capabilities and potential applications, discusses tools which can be used to predict HF system performance, discusses key challenges when implementing HF systems, introduces Automatic Link Establishment (ALE) as a means of automating many HF systems, and lastly, where HF standards and capabilities are headed. Course Level: Entry Level with some medium complexity topics Agenda • HF Communications – Quick Summary • How does HF Propagation work? • HF - Who uses it? • HF Comms Standards – ALE and Others • HF Equipment - Who Makes it? • HF Comms System Design Considerations – General HF Radio System Block Diagram – HF Noise and Link Budgets – HF Propagation Prediction Tools – HF Antennas • Communications and Other Problems with HF Solutions • Summary and Conclusion • I‟d like to learn more = “Critical Point” 15-Aug-12 I Love HF, just about On the other hand… anybody can operate it! ? ? ? ? 15-Aug-12 HF Communications – Quick pretest • How does HF Communications work? a. -
Broadcasting Telecasting
YEAR 101RN NOSI1)6 COLLEIih 26TH LIBRARY énoux CITY IOWA BROADCASTING TELECASTING THE BUSINESSWEEKLY OF RADIO AND TELEVISION APRIL 1, 1957 350 PER COPY c < .$'- Ki Ti3dddSIA3N Military zeros in on vhf channels 2 -6 Page 31 e&ol 9 A3I3 It's time to talk money with ASCAP again Page 42 'mars :.IE.iC! I ri Government sues Loew's for block booking Page 46 a2aTioO aFiE$r:i:;ao3 NARTB previews: What's on tap in Chicago Page 79 P N PO NT POW E R GETS BEST R E SULTS Radio Station W -I -T -H "pin point power" is tailor -made to blanket Baltimore's 15 -mile radius at low, low rates -with no waste coverage. W -I -T -H reaches 74% * of all Baltimore homes every week -delivers more listeners per dollar than any competitor. That's why we have twice as many advertisers as any competitor. That's why we're sure to hit the sales "bull's -eye" for you, too. 'Cumulative Pulse Audience Survey Buy Tom Tinsley President R. C. Embry Vice Pres. C O I N I F I I D E I N I C E National Representatives: Select Station Representatives in New York, Philadelphia, Baltimore, Washington. Forloe & Co. in Chicago, Seattle, San Francisco, Los Angeles, Dallas, Atlanta. RELAX and PLAY on a Remleee4#01%,/ You fly to Bermuda In less than 4 hours! FACELIFT FOR STATION WHTN-TV rebuilding to keep pace with the increasing importance of Central Ohio Valley . expanding to serve the needs of America's fastest growing industrial area better! Draw on this Powerhouse When OPERATION 'FACELIFT is completed this Spring, Station WNTN -TV's 316,000 watts will pour out of an antenna of Facts for your Slogan: 1000 feet above the average terrain! This means . -
Jazz and Radio in the United States: Mediation, Genre, and Patronage
Jazz and Radio in the United States: Mediation, Genre, and Patronage Aaron Joseph Johnson Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Graduate School of Arts and Sciences COLUMBIA UNIVERSITY 2014 © 2014 Aaron Joseph Johnson All rights reserved ABSTRACT Jazz and Radio in the United States: Mediation, Genre, and Patronage Aaron Joseph Johnson This dissertation is a study of jazz on American radio. The dissertation's meta-subjects are mediation, classification, and patronage in the presentation of music via distribution channels capable of reaching widespread audiences. The dissertation also addresses questions of race in the representation of jazz on radio. A central claim of the dissertation is that a given direction in jazz radio programming reflects the ideological, aesthetic, and political imperatives of a given broadcasting entity. I further argue that this ideological deployment of jazz can appear as conservative or progressive programming philosophies, and that these tendencies reflect discursive struggles over the identity of jazz. The first chapter, "Jazz on Noncommercial Radio," describes in some detail the current (circa 2013) taxonomy of American jazz radio. The remaining chapters are case studies of different aspects of jazz radio in the United States. Chapter 2, "Jazz is on the Left End of the Dial," presents considerable detail to the way the music is positioned on specific noncommercial stations. Chapter 3, "Duke Ellington and Radio," uses Ellington's multifaceted radio career (1925-1953) as radio bandleader, radio celebrity, and celebrity DJ to examine the medium's shifting relationship with jazz and black American creative ambition. -
The Development of HF Broadcast Antennas
Development of HF Broadcast Antennas FEATURES FEATURES Development of HF Broadcast Antennas the 50% power loss, but made the Rhombic fre - Free Europe and Radio Liberty sites. quency-sensitive, consequently losing the wide- Rhombic antennas are no longer recommend - The Development of HF bandwidth feature. The available bandwidth ed for HF broadcasting as the main lobe is nar - depends on the length of the wire and, using dif - row in both horizontal and vertical planes which ferent lengths of transmission line, it is possible to can result in the required service area not being Broadcast Antennas access two or three different broadcast bands. reliably covered because of the variations in the A typical rhombic antenna design uses side ionosphere. There are also a large number of lengths of several wavelengths and is at a height side lobes of a size sufficient to cause interfer - Former BBC Senior Transmitter Engineer Dave Porter G4OYX continues the story of the of between 0.5-1.0 λ at the middle of the operat - ence to other broadcasters, and a significant pro - development of HF broadcast antennas from curtain arrays to Allis antennas ing frequency range. portion of the transmitter power is dissipated in the terminating resistance. THE CORNER QUADRANT ANTENNA Post War it was found that if the Rhombic Antenna was stripped down and, instead of the four elements, had just two end-fed half-wave dipoles placed at a right angle to each other (as shown in Fig. 1) the result was a simple cost- effective antenna which had properties similar to the re-entrant Rhombic but with a much smaller footprint. -
The Magazine for TV and FM Dxers
VHF-UHF DIGEST The Official Publication of the Worldwide TV-FM DX Association JUNE 2010 The Magazine for TV and FM DXers Ch4 Santa Marta Colombia(Caracol) Ch2 Caracas Venezuela(Tves) May 3rd Double Hop E skip! Bill Hepburn Sees Colombia and Venezuela in Color! Visit Us At www.wtfda.org Cover Photos by Bill Hepburn THE WORLDWIDE TV-FM DX ASSOCIATION Serving the UHF-VHF Enthusiast THE VHF-UHF DIGEST IS THE OFFICIAL PUBLICATION OF THE WORLDWIDE TV-FM DX ASSOCIATION DEDICATED TO THE OBSERVATION AND STUDY OF THE PROPAGATION OF LONG DISTANCE TELEVISION AND FM BROADCASTING SIGNALS AT VHF AND UHF. WTFDA IS GOVERNED BY A BOARD OF DIRECTORS: DOUG SMITH, GREG CONIGLIO, BRUCE HALL, KEITH McGINNIS AND MIKE BUGAJ. Editor and publisher: Mike Bugaj Treasurer: Keith McGinnis wtfda.org Webmaster: Tim McVey wtfda.info Site Administrator: Chris Cervantez Editorial Staff: Jeff Kruszka, Keith McGinnis, Fred Nordquist, Nick Langan, Doug Smith, Peter Baskind, Bill Hale and John Zondlo, Our website: www.wtfda.org; Our forums: www.wtfda.info JUNE 2010 _______________________________________________________________________________________ CONTENTS Page Two 2 Mailbox 3 Finally! For those of you online with an email TV News…Doug Smith 5 address, we now offer a quick, convenient and FM News…Bill Hale 12 secure way to join or renew your membership FCC Facilities Changes 16 in the WTFDA. Just logon to Paypal and send Photo News…Jeff Kruszka 20 your dues to [email protected]. Northern FM DX…Keith McGinnis 22 Use the address above to either join the 6 meters…Peter Baskind 33 WTFDA or renew your membership in North Eastern TV DX…Nick Langan 34 America’s only TV and DX organization. -
An Update on the CCSDS Optical Communications Working Group Interoperability Standards
An Update on the CCSDS Optical Communications Working Group Interoperability Standards Bernard L. Edwards Robert Daddato NASA Goddard Space Flight Center European Space Agency Greenbelt, MD 20771 USA Darmstadt, Germany Klaus-Juergen Schulz Randall Alliss European Space Agency Northrop Grumman Corporation Darmstadt, Germany McLean, VA 22102 USA Jon Hamkins Dirk Giggenbach NASA Jet Propulsion Laboratory DLR Pasadena, CA 91109 USA Oberpfaffenhofen, Germany Bryan Robinson Lena Braatz MIT Lincoln Laboratory Booz Allen Hamilton, Inc. Lexington, MA 02420 USA McLean, VA 22102 USA Abstract – International space agencies around the one space agency’s spacecraft could be served by world are working together in the Interagency another space agency’s ground antennas. Operation Advisory Group (IOAG) and the Consultative Committee for Space Data Systems The overall development of international space (CCSDS) to develop interoperability standards for optical communications. The standards support communication standards for cross support is optical communication systems for both Near Earth coordinated by the Interagency Operations and Deep Space robotic and human-rated spacecraft. Advisory Group (IOAG) [1]. The IOAG is an The standards generally address both free space links organization made up of international space between spacecraft and free space links between agencies that provides a forum for identifying spacecraft and ground. This paper will overview the common needs and coordinating space history and structure of the CCSDS Optical communications policy, high-level procedures, Communications Working Group and provide an technical interfaces, and other matters related to update on the set of optical communications interoperability and space communications. The standards being developed. The paper will address the ongoing work on High Photon Efficiency IOAG considers the future requirements and trends communications, High Data Rate communications, in spacecraft communications needs and assigns and Optical On/Off Keying communications. -
Exploring the Atom's Anti-World! White's Radio, Log 4 Am -Fm- Stations World -Wide Snort -Wave Listings
EXPLORING THE ATOM'S ANTI-WORLD! WHITE'S RADIO, LOG 4 AM -FM- STATIONS WORLD -WIDE SNORT -WAVE LISTINGS WASHINGTON TO MOSCOW WORLD WEATHER LINK! Command Receive Power Supply Transistor TRF Amplifier Stage TEST REPORTS: H. H. Scott LK -60 80 -watt Stereo Amplifier Kit Lafayette HB -600 CB /Business Band $10 AEROBAND Solid -State Tranceiver CONVERTER 4 TUNE YOUR "RANSISTOR RADIO TO AIRCRAFT, CONTROL TLWERS! www.americanradiohistory.com PACE KEEP WITH SPACE AGE! SEE MANNED MOON SHOTS, SPACE FLIGHTS, CLOSE -UP! ANAZINC SCIENCE BUYS . for FUN, STUDY or PROFIT See the Stars, Moon. Planets Close Up! SOLVE PROBLEMS! TELL FORTUNES! PLAY GAMES! 3" ASTRONOMICAL REFLECTING TELESCOPE NEW WORKING MODEL DIGITAL COMPUTER i Photographers) Adapt your camera to this Scope for ex- ACTUAL MINIATURE VERSION cellent Telephoto shots and fascinating photos of moon! OF GIANT ELECTRONIC BRAINS Fascinating new see -through model compute 60 TO 180 POWER! Famous actually solves problems, teaches computer Mt. Palomar Typel An Unusual Buyl fundamentals. Adds, subtracts, multiplies. See the Rings of Saturn, the fascinating planet shifts, complements, carries, memorizes, counts. Mars, huge craters on the Moon, phases of Venus. compares, sequences. Attractively colored, rigid Equat rial Mount with lock both axes. Alum- plastic parts easily assembled. 12" x 31/2 x inized overcoated 43/4 ". Incl. step -by -step assembly 3" diameter high -speed 32 -page instruction book diagrams. ma o raro Telescope equipped with a 60X (binary covering operation, computer language eyepiece and a mounted Barlow Lens. Optical system), programming, problems and 15 experiments. Finder Telescope included. Hardwood, portable Stock No. 70,683 -HP $5.98 Postpaid tripod. -
Experimenterum1e 75 Jul
ROW ELECTRONICS BLOWS A TORNADO'S FUSE WHITE'S RADIO LOG SHORTWAVE LISTINGS E Radio-TV AM-FM STATIONS/ WORLDWIDI / EXPERIMENTERUM1E 75 JUL TALK ON AN INVISIBLE LIGHT BEAM! Home -brew "laser" communicator is bug- proof, jam- proof, license -free! BUILD S15 TACHOMETER STRETCHER $9 CB SIGNAL CENTS t $12 CAMPER'S SQUAWK ROY $17 AUTO SIREN SENTRY LAB CHECKS Sony TC -350 Stereo Tapecorder Harmony -by- Heathkit TG -46 Electric Guitar Euphonies U -15 -LS Stereo Cartridlge and PS -15 Power Source www.americanradiohistory.com .- r Introducing EICO's New "Cortina Series "! Today's electrotechnology makes possible near -perfect Amplifier: Distortionless, natural sound with unre stereo at moderate manufacturing cost: that's de- the stricted bass and perfect transient response (no inter - sign concept behind the new EICO "Cortina" all solid - stage or output transformers); complete input, state stereo components. filter All are 100% professional, and control facilities; failure -proof rugged all -silicon conveniently compact (31/4"H, 12 "W, 8 "D), in an transistor circuitry. esthetically striking "low silhouette." Yes, you can pay more for high quality stereo. But now there's no need Model 3200 Solid -State FM /MPX Automatic Stereo to. The refinements will be marginal and probably Tuner. Driftless, noiseless performance; 2.4V for 30db inaudible. Each is $89.95 kit, $129.95 wired. quieting; RF, IF, MX are pre -wired and pre -tuned on printed circuit boards - you wire only non -critical power Model 3070 All- Silicon Solid -State 70 -Watt Stereo supply. 7 New Ways to make Electronics more Fun! Save up to 50' with EICO Kits and Wired Equipment. -
* in Her 92D Year to Confer About Chicken Supper,' Carnival, Dance
&& tfaa Hews 'at BED BANK Told Fearlessly nnd Without Bias, Issued Weekly, Entered, es Seeond-Clsss Matter at the Post* Subucriptlon Pricei One Tear $1.50 VOLUME LVI, NO. 3. oKka at Ikd Bank. H> 3,, under tlio Act et March 8, 1E7S. RED BANK, N. J., WEDNESDAY, JULY. 12,1933. Six Months 31,00, Single Cop? 4c. PAGES 1 TO 8. BOYS IN CAMP, To Confer About WRITTEN ON COFFEB. Red Bank Boys Enjoying Vacation A Letter from Montana on a. Thin * In Her 92d Year In Pennsylvania, «dge Sheet of Metal. Several Red Bank boys are en- On exhibition In the display window Old Landmark in the Village joying part of their summer vacation Seabright Officials Want Part at The Public Invited to Attend of Tho Register office ia a letter writ- George Antonides Elected Coun- Depoeitorg of the Mechasts Trust Miss Sara M. Willett for Sixty at Camp Llndcnmcre, Wolmenadorf, ten with ink on a copper sheet which Years Waa a School Teacher Center Torn Down end the Pennsylvania, which is under the di- Highland Beach Left Standing Ceremonies to be Held at was received by Mrs. J, A. Van- cilor of Onward Council, Jun- Company Will Get P«ynttnt« • in This Part of Monmouth Lumber to be Used to Build a rection of Georgo Strauss of the Red for Use of Fire Apparatus— Camp Happiness at Leonardo Scholck of Newman Springs road. ior Order United American July 30 Instead of Septcftsfef* County—Varied Experiences. Bank high school faculty. Among Conference This Week. Friday Afternoon. Tho copper i3 not much thicker than Mechanics Monday Night. -
High Frequency Communications – an Introductory Overview - Who, What, and Why?
High Frequency Communications – An Introductory Overview - Who, What, and Why? 12 April, 2012 Abstract: Over the past 60+ years the use and interest in the High Frequency (HF -> covers 1.8 – 30 MHz) band as a means to provide reliable global communications has come and gone based on the wide availability of the Internet, SATCOM communications, as well as various physical factors that impact HF propagation. As such, many people have forgotten that the HF band can be used to support point to point or even networked connectivity over 10’s to 1000’s of miles using a minimal set of infrastructure. This presentation provides a brief overview of HF, HF Communications, introduces its primary capabilities and potential applications, discusses tools which can be used to predict HF system performance, discusses key challenges when implementing HF systems, introduces Automatic Link Establishment (ALE) as a means of automating many HF systems, and lastly, where HF standards and capabilities are headed. Course Level: Entry Level with some medium complexity topics Agenda • HF Communications – Quick Summary • How does HF Propagation work? • HF - Who uses it? • HF Comms Standards – ALE and Others • HF Equipment - Who Makes it? • HF Comms System Design Considerations – General HF Radio System Block Diagram – HF Noise and Link Budgets – HF Propagation Prediction Tools – HF Antennas • Communications and Other Problems with HF Solutions • Summary and Conclusion • I‟d like to learn more = “Critical Point” 13-Apr-12 I Love HF, just about On the other hand… anybody can operate it! ? ? ? ? 13-Apr-12 HF Communications – Quick pretest • How does HF Communications work? a. -
Up, up and Away!
VHF-UHF DIGEST The Official Publication of the Worldwide TV-FM DX Association NOVEMBER 2009 The Magazine for TV and FM DXers PHOTO BY PAUL MITSCHLER UP, UP AND AWAY! CH 4 SANTA MARTA COLOMBIA - PHOTO BY BILL HEPBURN OFF SEASON E-SKIP DOUBLE HOP TO SOUTH AMERICA 10-10-09 Visit Us At www.wtfda.org THE WORLDWIDE TV-FM DX ASSOCIATION Serving the UHF-VHF Enthusiast THE VHF-UHF DIGEST IS THE OFFICIAL PUBLICATION OF THE WORLDWIDE TV-FM DX ASSOCIATION DEDICATED TO THE OBSERVATION AND STUDY OF THE PROPAGATION OF LONG DISTANCE TELEVISION AND FM BROADCASTING SIGNALS AT VHF AND UHF. WTFDA IS GOVERNED BY A BOARD OF DIRECTORS: DOUG SMITH, GREG CONIGLIO, BRUCE HALL, KEITH McGINNIS AND MIKE BUGAJ. Editor and publisher: Mike Bugaj Treasurer: Keith McGinnis wtfda.org Webmaster: Tim McVey wtfda.info Site Administrator: Chris Cervantez Editorial Staff: Jeff Kruszka, Keith McGinnis, Fred Nordquist, Nick Langan, Doug Smith, Peter Baskind, Bill Hale and John Zondlo, Our website: www.wtfda.org; Our forums: www.wtfda.info NOVEMBER 2009 _______________________________________________________________________________________ CONTENTS Page Two 2 Finally! For those of you online with an email Mailbox 3 address, we now offer a quick, convenient and TV News…Doug Smith 4 secure way to join or renew your membership FM News…Bill Hale 11 in the WTFDA from our page at: Photo News…Jeff Kruszka 22 http://www.wtfda.org/join.html FM South…John Zondlo 24 You can now renew either paper VUD Eastern TV DX…Nick Langan 25 membership or your online eVUD membership Western TV DX…Nick Langan 27 at one convenient stop.