1 Another Way to View Propagation Predictions for DXing and Contesting By R. Dean Straw, N6BV Senior Assistant Technical Editor, ARRL April 22, 2006 International DX Convention Visalia, CA
2 I will talk about the following: Area-coverage predictions using VOAAREA. I will compare VOAAREA predictions to actual results for the 2005 Sweepstakes Phone contest. I will discuss how to make customized antennas for VOAAREA.
3 The VOAAREA Program VOAAREA is one of the programs in the software suite that come with VOACAP. VOAAREA creates customizable contours on several selectable map projections. One of the key parameters is setting the antenna properly, for both receiver and transmitter.
4 Table of Sigs/Elevs -- Chicago 04 = Zone, Nov., CA (San Francisco) to IL (Chicago), SSN = Very Low, S-Units GMT Sig Elev Sig Elev Sig Elev Sig Elev Sig Elev Decent 15 meter opening predicted Some 10 meter signals predicted I ve presented this tabular format in various forums in the past.
5 Table of Sigs/Elevs East Coast 05 = Zone, Nov., CA (San Francisco) to Washington (D.C.), SSN = Very Low, S-Units GMT Sig Elev Sig Elev Sig Elev Sig Elev Sig Elev No 10 meters 15 meters doesn t last long
6 Traditional Summary, All Bands San Francisco to Rest of USA, November 2005 SS Signal, S-Units MHz W3 14 MHz W3 21 MHz W3 7 MHz W9 14 MHz W9 21 MHz W Nighttime Time, UTC Daylight Complicated, isn t it??
7 Coverage Most Populous Areas US Census 2000 Data
8 Coverage Most Populous Areas Midwest East Coast
9 Sweepstakes 2005 Modeling Assumptions for VOAAREA Antennas: 3-element Yagi at 55 feet over flat ground for 20, 15 and 10 meters. Antennas for 40 and 80 meters: Dipoles at 75 feet over flat ground. Antenna are a little smaller than my usual assumptions but represent realistic stations W of RF power. Very Low SSN = 10.
10 80-Meter Coverage Unless you have really big antennas on 80 meters, this band can be very challenging in Sweepstakes from California. Particularly to the East Coast. The area coverage plots that follow are centered on Chicago, Washington (DC) and San Francisco.
11 W9 is very strong in the populous areas of USA on 80
12 W3 is very strong in the populous areas of USA on 80
13 W6 is not strong in the most populous areas on 80
14 40-Meter Coverage Bigger antennas help on 40 meters (although dipoles don t do badly). Big antennas are needed on phone, especially to run the East Coast. QRO is important for rate on 40. There are times when the East Coast and Midwest go long skip and then Californians can have some advantages.
15 W9 has skip zone in Midwest on 40 in the evening
16 W3 has skip zone in mid East Coast on 40 in the evening
17 W6 can cover W3 and W9 skip zones on 40 meters
18 40-Meter Movie Sequence From 23 UTC to 12 UTC (late afternoon to East Coast sunrise). Assumes 75-foot high 40-meter dipoles. Assumes 1500 W.
20 N6BV 2005: 0 Qs Los Angeles coverage is good at this time
21 2005: 59 Qs Los Angeles coverage beginning to go long
22 2005: 87 Qs Skip is long to southern California
23 2005: 68 Qs This hole in single F2 hop coverage is caused by the very low angles needed
24 2005: 47 Qs Midwest hole widens
25 2005: 53 Qs Hole begins to shrink
26 2005: 72 Qs
27 2005: 37 Qs
31 Midwest coverage begins to break up
32 East Coast sunrise CA is still strong here
33 20-Meter Coverage 20 is usually a zoo on phone, particularly during low part of Solar Cycle, when 15 and 10 meters are marginal or non-existent. Big stacks rule, although 1500 W and a 3- element Yagi can easily run rate. Moral of this story: Run QRO if you possibly can, with big antennas!
34 W9 has big skip zone in Midwest & East Coast on 20 meters in the afternoon
35 W3 has big skip zone on East Coast & Midwest on 20 meters in the afternoon
36 W6 covers Midwest and East Coast on 20 in the afternoon
37 20-Meter Movie Sequence From 13 UTC to 02 UTC (W6 sunrise to evening) Assumes 3-element Yagis at 55 feet. Assumes 1500 W.
50 2005: 24/0 Qs Propagation gets a little better for a while in Midwest
51 2005: 0/0 Qs Goodnight, 20 meters
52 15-Meter Coverage During low portion of Solar Cycle, 15 meters will be reasonably good to Midwest, but marginal to East Coast. Big stacks help, of course, but relatively modest 15-meter beams can do well on 15.
53 W9 has huge skip zone on 15 meters covering Midwest and East Coast
54 W3 also has huge skip zone on 15 meters for the Midwest and East Coast
55 W6 covers Midwest well on 15 in late morning but not well to East Coast
56 15-Meter Movie Sequence 14 to 01 UTC (W6 sunrise at at 1443 UTC to sunset at 0103 UTC). Assumes 3-element 15-meter Yagis at each end at 55 feet. Assumes 1500 W.
57 N6BV 2005: 1 Q Band opens to the SE into Texas
58 2005: 4 Qs Opening to Midwest
59 2005: 46 Qs
60 2005: 53 Qs S5 to East Coast
61 2005: 65 Qs S7 in New England and Florida
62 2005: 25 Qs
63 2005: 97/1 Qs Midwest is best place where there s some action
64 2005: 90/0 Qs
65 2005: 0/0 Qs Fading even in Midwest
66 2005: 0/0 Qs Fading
67 2005: 0/0 Qs Gone
68 What About Power? Compare area-coverage plots for 20 meters at 18 UTC for 100 W and for 1500 W. And what about QRP?
69 1500 W gives S9 out to mid Ohio
70 For 100 W, S9 out to almost Kansas
71 For QRP, S7 out almost to Kansas
72 Omnidirectional Antennas The plots here have assumed omnidirectional antennas, a misnomer. This assumes that a directional antenna can actually be pointed at azimuth angles of interest. For flat terrain, I model antennas with EZNEC and then convert to 2D VOAAREA type *.11 files using MultiNEC by AC6LA. For complex terrains, I use HFTA and convert to a 2D VOAAREA *.11 file using MAKEVOA.
73 Antenna pattern is omnidirectional (propagation is not )
74 Customizing for Your Antennas What kind of area coverage do you get for your own antennas? I am very fortunate to use the super station at N6RO for Sweepstakes Phone. N6RO has Yagi stacks on 10, 15, 20 and 40 meters. These have significantly more gain than the 3-element Yagis in the previous plots.
75 Customizing for Your Antennas Directional patterns only work for flatground terrain presently. I model 3D type *.13 azimuth/elevation patterns using MultiNEC by AC6LA with EZNEC.
76 Customizing for Your Antennas This shows pattern of 40-meter stack at N6RO pointed at 70
77 40-Meter Stack at N6RO This is the only way to take down two 4L40 Yagis and replace them with two new M 2 ones in one day! 35 ton crane with 145 reach N6RO, Oct 3, 2005
78 Planning for a Contest The following shows a few slides from a movie I made for myself to guide my band-changing decisions for the 2005 ARRL Sweepstakes phone contest. The number of QSOs made in the 2005 SS Phone contest are listed as well.
79 20 m = 150 Qs 15 m 23 UTC 40 m
80 20 m = 124 Qs 15 m 00 UTC 40 m
81 20 m = 24 Qs 15 m 01 UTC 40 m = 59 Qs
82 How Did Predictions Compare With Reality? 21 UTC on 15 Meters, N6RO Antennas November 2005 Sweepstakes
83 Actual QSOs by N6BV in 2005 SS Phone, 21 UTC on 15 Meters This format was generated using DX Atlas; courtesy K6TA/K6KO
84 Prediction 15 m 21 UTC Actual
85 20 m 22 UTC
86 Low-Freq. Problems in VOACAP Since 6/2/1999 VOACAP has produced signal predictions lower than its predecessor IONCAP on bands lower than 40 meters. The problem lies in a change in calculations made then for the loss through the E layer. VOA has no validation data below 5 MHz because they had no stations there. CAPMan does produce more believable lowfrequency computations, but source code is gone.
87 Comparing Versions of VOACAP Version About 18 db difference on 80 meters for I version (standing for IONCAP). I use CAPMAN for my propagation tables
88 80 meters, after 6/2/99 Pre 6/2/99 Stronger signals into Europe are more believable from experience, ( I version).
89 Low-Freq. Problems in VOACAP Even after retiring from government service, Greg Hand and George Lane, the people who helped develop VOACAP, have continued its development. Bless them! Greg will soon be posting a version of a new VOACAP/VOAAREA that includes the I option.
90 In Conclusion I ve demonstrated some intuitive areacoverage predictions using VOAAREA. I have also touched on how to make customized antennas for VOAAREA. And by the way, the plots shown here involve a great deal of graphical manipulation by hand!
Regional Emergency Communications John Walters W8CX Alpena RACES Regional Communications Needs 400 mile radius No skip zone; no dead spots No interference with or from broadcasters Reliable day/night coverage
ARRL Field Day 2015 Rules 1. Eligibility: Field Day is open to all amateurs in the areas covered by the ARRL/RAC Field Organizations and countries within IARU Region 2. DX stations residing in other regions
Antenna Height and Communications Effectiveness Second Edition A Guide for City Planners and Amateur Radio Operators By R. Dean Straw, N6BV, and Gerald L. Hall, K1TD Senior Assistant Technical Editor and
Switching RF Over Fiber Case Study US Agency Create Monitor The benefits of using fiber for data transmissions are significant and undisputed. However, RF engineers have believed that fiber optics delivers
AN INTRODUCTION TO TELEMETRY PART 1: TELEMETRY BASICS Telemetry is defined as the sensing and measuring of information at some remote location and then transmitting that information to a central or host
Antenna Properties and their impact on Wireless System Performance Dr. Steven R. Best Cushcraft Corporation 48 Perimeter Road Manchester, NH 03013 Phone (603) 627-7877 FAX: (603) 627-1764 Email: firstname.lastname@example.org
An Algorithm for Automatic Base Station Placement in Cellular Network Deployment István Törős and Péter Fazekas High Speed Networks Laboratory Dept. of Telecommunications, Budapest University of Technology
Part I: Wireless System Characteristics Smart grid technology holds great promise of cleaner air, more efficient power, and lower greenhouse gas emissions. In a smart grid system, the system itself will
RF Path Loss & Transmission Distance Calculations By Walter Debus Director of Engineering Axonn, LLC Technical Memorandum August 4, 2006 INTRODUCTION DOC# 8545-0003-01 For radio transmission systems that
cellularbooster.com THINGS YOU MUST KNOW BEFORE YOU 7BUY AND INSTALL A CELLULAR BOOSTER We have created this ebook for people who need some help understanding cellular phone boosters. As most people are
In Texas, we re helping To help Texas homeowners, we ve opened centers in Houston and Dallas in December of 2009. Through all our efforts, we ve been able to offer mortgage modifications to more than 900,000
Caneda Transport Inc. Your Direct Connection Between the US and Canada Established in 1975. Caneda has been providing Quality, Professional, and Friendly carrier service for over 36 years. Company Profile
Correlation between OATS, Fully Anechoic Room and GTEM Radiated Emissions Stephen Clay Introduction: Just a few words about myself. My name is Steve Clay and I work for Nokia Mobile Phones, and it is my
SDR and Contesting The Future is Now By Pete Smith, N4ZR Additional contributions by: N6TV, VE3NEA, I2PHD, and WA6KBL Contest Forum Dayton Hamvention, May 2008 Outline What is SDR all about? SDR demo What
Trends Trends in Office Buildings Operations, 2011 THE SAMPLE This 2012 edition represents 2011 data collection from nearly 2,700 private-sector buildings across the United States and Canada. This year
2 University of Illinois, Urbana-Champaign 2 University of Michigan, Ann Arbor 4 Indiana University, Bloomington 6 University of California, Berkeley 7 Michigan State University 8 Ohio State University
BSA Technical Information Electrical Isolation of Co-Located Horizontally and Vertically Stacked Antennas Introduction: Service providers are facing rapidly increasing pressure from zoning boards to co-locate
For more detailed information, see your Vantage Vue Console manual. Current Weather Mode Moon phase, alarm & forecast icons Wind Rose Compass Antenna icon shows active transmission Graph of selected variable
FAST FACTS The Nursing Workforce 2014: Growth, Salaries, Education, Demographics & Trends RN Job Growth Rate (new and replacement) By State/Region, 2012-2022) 14 states project an annual growth rate of
Graduate School of Global Information and Telecommunication Studies, Waseda University Abstract of Doctoral Dissertation Wireless Channel Characteristic and Its Performance for Stratospheric Platform Communication
Electromagnetic radiation exposure: assessment against ACA mandated limits General radio services (operating above 0 MHz) (Edition May 0) Disclaimer Unless otherwise specified, the information contained
AIR DRM DRM+ Showcase New Delhi, 23 rd 27 th May 2011 The Report was prepared by Digital Radio Mondiale Consortium (DRM) & All India Radio (AIR) Version: 2011-07-26 Index: 1. Introduction 2. DRM+ System
Sterling Park Amateur Radio Club 3 November 2010 By Tom Nail WA2BCK Licensed in 1965 as WN2UNX Licensed in 1967 as WA2BCK Amateur Extra class 18 February 1972 Founder Buffalo Area DX Club 1969 Operated
2014 Retiree Insurance Rates Flight Attendant Traditional Plans Pre Medicare Retiree Traditional PPO Medical Plan (Retirees after June 30, 2003) 2014 Retiree Contributions 1 Adult 2 Adults 1 Adult + Child(ren)
Capacity Constrained Smart Grid Design Smart Devices Smart Networks Smart Planning EDX Wireless Tel: +1-541-345-0019 I Fax: +1-541-345-8145 I email@example.com I www.edx.com Mark Chapman and Greg Leon EDX Wireless
Regional Short-term Electricity Consumption Models Prepared for Brown Bag Seminar on Forecasting of the Federal Forecasters Consortium (FFC), in alliance with Research Program on Forecasting at The George
CABLES CABLES radiating Link Budget 3. 1. LINK BUDGET The basic elements to calculate a link budget can be illustrated by considering the example shown in Figure 4. It involves a GSM 900 radio coverage
Astrock, t he A stronomical Clock The astronomical clock is unlike any other clock. At first glance you ll find it has similar functions of a standard clock, however the astronomical clock can offer much
GSM frequency planning Band : 890-915 and 935-960 MHz Channel spacing: 200 khz (but signal bandwidth = 400 khz) Absolute Radio Frequency Channel Number (ARFCN) lower band: upper band: F l (n) = 890.2 +
Regional Short-term Electricity Consumption Models Prepared for 25 th Annual North American Conference of the USAEE/IAEE, Denver September 18-21, 25 Frederick L. Joutz, Department of Economics The George
Zero to 100 in 18 Months Getting Started in DXing How I Did It By Craig Bradley, AE6RR Page 1 of 46 Background History After 37 years off the air I was re-licensed in Sept. 2004 WV6SVW & WA6SVW 1961 to
TOP 0 PROGRAMS 0 In your firm s hiring experience in the past five years, which schools are best preparing students for success in the profession? UNDER. Cornell University. Rice University. University
American Bankruptcy Institute Soueast Bankruptcy Workshop July 23-26, 2015 Ritz-Carlton Amelia Island Amelia Island, Florida National Association of Bankruptcy Trustees 2015 Annual Convention August 27-29,
TAX SECTION OF THE STATE BAR OF TEXAS 2015 2016 CALENDAR June 2015 10 12 18 18 19 22 23 July 2015 16 18 24 25 July 30 Aug. 4 August 2015 July 30 Aug. 4 Texas Federal Tax Institute Hyatt Hill Country Resort
1 GPDX Dxpedition to the islands of Flores and Corvo Participation in the IOTA Contest 2014 - CR2V By invitation of our good friend Antonio Madeira, CU8AS, GPDX - Portuguese DX Group, through CT1EGW, CT1EEQ,
Newspapers reach extends deeply into the Hispanic market Newspapers are uniquely positioned to grow your share in the Hispanic market A copy of this presentation can be found at: www.nahpprocurement.org
IT S ABOUT PEOPLE SERVICE PROFITABILITY RELATIONSHIPS OPENING DOORS FOR PEOPLE IT S ABOUT PEOPLE SUCCESSFUL ORGANIZATIONS ARE COMPRISED OF SUCCESSFUL INDIVIDUALS. IT S ABOUT PROFITABILITY THE NAME OF THE
Remote Monitoring and Control 2011 Eliminating Wires and Batteries: Wireless Power for Remote Monitoring Applications Harry Ostaffe VP, Marketing & Business Development Powercast Corporation 1 Wireless
Coaxial Cable Feeder Influence on Yagi Antenna Dragoslav Dobričić, YU1AW firstname.lastname@example.org Introduction o far, in several previous articles [1, 2, 3], we investigated how boom radius and its S distance
Software development in distributed environments Index Chapter 1. Software development model Chapter 2. Challenges Chapter 3. Remedy Chapter 4. Conclusions OPENSHPERE - Developing large projects in distributed
APPLICATIONS OF RESOURCE ASSESSMENT FOR SOLAR ENERGY Joseph McCabe PE ASES Fellow PO Box 270594 Littleton, CO 80127 email@example.com ABSTRACT There are many data sets and numbers quantifying the potential
Electromagnetic radiation exposure: assessment against ACA mandated limits Paging services (Edition May 2002) Disclaimer Unless otherwise specified, the information contained in these guidelines is intended
An in-depth look at mesh networking using repurposed WiFi equipment in FCC Part 97 Amateur Radio spectrum. Seidenberg School of Computer Science and Information Systems Pace University Pleasantville, New
OUTLOOK Visions and research directions for the Wireless World November 2008, No 2 Considerations in the Choice of Suitable Spectrum for Mobile Communications WG8 White Paper Considerations in the Choice
HOW TO USE THE WORLD TIME FUNCTION INSTRUCTIONS (P. 2) BEDIENUNGSANLEITUNG (S. 10) INSTRUCTIONS (P. 18) ISTRUZIONI (P. 26) INSTRUCCIONES (P. 34) INSTRUÇÕES (P. 42) ИНСТРУКЦИИ (C. 50) (58 ) If your watch
Potential Effects of Wind Turbine Generators on Pre-Existing RF Communication Networks June 2009 SEAN YUN 2 2 Abstract In an effort to help preserve the ozone and the availability of diminishing natural
3. Shading The effects of shading by one building upon another can be either positive or negative depending upon the site-specific circumstances of the properties involved. A potential benefit of shading
MASTER PLAN FOR EXISTING 254-FOOT COMMUNICATIONS TOWER 16700 Skyline Drive La Habra Heights California PROPERTY OWNER: Coast Community College District 1370 Adams Avenue Costa Mesa, CA 92626 Attn: Richard
INTERFERENCE ON THE FM BAND Doug Vernier V-Soft Communications/Telecommunication Consultants Cedar Falls, Iowa As enter into the new millennium, we note that the FCC has several proposals before it that
Campus Best Practice (GN3/NA3/T4) WLAN Network Planning Anders Nilsson, SUNET Wireless Training Workshop Belgrad, 12 September 2011 Agenda Wi-Fi standards (a/b/g/n.) RF Basics (know your layer 1) Preparing
ZACH W. STAR ALLIANCE LOUNGE, LOS ANGELES (LAX) Problem: The Star Alliance Lounge in LAX (Los Angeles Airport) is located in a section of the airport with limited cellular coverage. The goal was to deliver
2011 Only Influencers digital marketing salary guide Bill McCloskey Median Salary Guide for Digital Marketers broken down by Title, Region, Company Type, and Years in Business 262 South Blvd, Nyack, NY
Rec. ITU-R F.1113 1 RECOMMENDATION ITU-R F.1113 RADIO SYSTEMS EMPLOYING METEOR-BURST PROPAGATION (Question ITU-R 157/9) (1994) Rec. ITU-R F.1113 The ITU Radiocommunication Assembly, considering a) that
UNIVERSITY OF TORONTO FACULTY OF APPLIED SCIENCE AND ENGINEERING The Edward S. Rogers Sr. Department of Electrical and Computer Engineering ECE422H1S: RADIO AND MICROWAVE WIRELESS SYSTEMS EXPERIMENT 3:
Solar Power at Vernier Software & Technology Having an eco-friendly business is important to Vernier. Towards that end, we have recently completed a two-phase project to add solar panels to our building
TAX SECTION OF THE STATE BAR OF TEXAS 2015 2016 CALENDAR June 2015 10-12 18 18 19 22 23 July 2015 16-18 24-25 July 30 - Aug. 4 August 2015 July 30 - Aug. 4 Texas Federal Tax Institute Hyatt Hill Country
Faculty and Staff Benefits at The University of North Carolina at Chapel Hill A Comparison to Benefits Offered by Peer Institutions People used to come to work at Carolina FOR the benefits. Now they leave
A Novel Perspective of Amateur Radio Contesting Sylvan Katz 1, VE5ZX http://www.dynamicforesight.com/~ve5zx mailto:firstname.lastname@example.org 1. The idea The contest community is a unique group of individuals who are
Why so many average Japanese office workers are quietly investing in The California Countdown to 2020 Let us show you what they re so excited about why this investment is set to take off and how you can
Cellular Wireless Antennas A Technical Brief GarrettCom Inc., November 2010 Overview The Cellular Wireless Antenna Technical brief is provided to assist with the design and deployment of the DX940 Cellular
Electronic Communications Committee (ECC) within the European Conference of Postal and Telecommunications Administrations (CEPT) PROTECTION OF THE BROADCASTING SERVICE FROM BROADCASTING SATELLITE SERVICE
INTRODUCTION TO SOLAR WEATHER & HF PROPAGATION Lewis Thompson W5IFQ September 27, 2011 PRESENTATION Ionospheric propagation NVIS Long-Range Frequency Selection (Critical Frequency & MUF) Propagation modeling
GEMNET DVB-T and ISDB-T Comparative Test Results October 10, 2008 Rembrandt Hotel Quezon City About GEMNET GEMNET or Global Expansion Media Network is the broadcast facility of the Iglesia ni Cristo (Church
SO L I DMO D E L I N GAS A TO O LFO RCO N S T RU C T I N SO G LA REN V E LO PE S by John F. Cotton College of Architecture & Environmental Design California Polytechnic State University San Luis Obispo,
RALI : LM 8 DATE OF EFFECT : 23/09/2015 Radiocommunications Assignment and Licensing Instruction FREQUENCY ASSIGNMENT REQUIREMENTS FOR THE LAND MOBILE SERVICE AUSTRALIAN COMMUNICATIONS AND MEDIA AUTHORITY
Astronomical applications of the over-the-horizon radar NOSTRADAMUS J-F. Degurse 1,2, J-Ph. Molinié 1, V. Rannou 1,S. Marcos 2 1 ONERA, Département Electromagnétisme et Radar 2 L2S Supéléc, CNRS UMR 8506,
The Political Economy of Electricity Markets A Brief History January 10, 2008 Peter Van Doren Senior Fellow Editor, Regulation Cato Institute I. Economists critique of regulated vertically integrated electricity
AN EXAMINATION OF ONLINE FRAUD COMPLAINT OCCURRENCES Lai C. Liu, University of Texas Pan American, email@example.com Kai S. Koong, University of Texas Pan American, firstname.lastname@example.org Margaret Allison, University
CONTENTS Building on strengths 1 Printed 2/26/2015 12:55 PM Pacific Standard Time WA State vs. peers Last Modified 3/2/2015 10:17 AM Pacific Standard Time Dimensionalizing Big Data Big Data: big and getting
Building a Foreign POP AusNOG2 Mark Prior Liaison APAC R&E Community Copyright 2008 Juniper Networks, Inc. 1 Why? Always keep in mind why you are doing this! So why are you doing this? :-) Probably because
RUSSIAN DX CONTEST - 2015 1. Contest sponsors The "Soyuz Radioljubitelej Rossii" (Union of Radioamateurs of Russia), SRR is pleased to announce 22 International "Russian DX Contest" 2. Contest Period 1200
We are pleased to share the Fall 2012 Small Business Owner Report, a semi-annual study that uncovers the concerns, aspirations and perspectives of small business owners across the country. This study examines
1. How do solar panels work? FREQUENTLY ASKED QUESTIONS Your solar panels capture sunlight and convert it to DC electricity Your solar system converts that energy to an AC current that can power your home