Hf radio ground wave propagation software

As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polarization, and scattering. W6elprop predicts ionospheric skywave propagation between any two locations on the earth on frequencies between 3 and 30 mhz. The lower the frequency, the better the ground wave propagation. It also holds for any frequency, including the 40m band. High frequency hf propagation models 230 mhz irregular terrain model itm longleyrice 20 mhz 20 ghz if77 wave propagation model gierhartjohnson air ground millimeter wave propagation.

To help you be in the right place at the right time, propagation prediction programs are available. They either refractreflect off the ionosphere or they are. Ace hf professional propagation software for hf radio operators. The links below provide information about high frequency propagation. Radar division hfrd for the prediction of ground wave propagation. In this section, we will examine ground wave propagation which has unique properties and finds an important place especially on the lower frequency hf bands like 160m, 80m, 60m, and 40m ham radio bands. Dx toolbox shortwave ham radio hf radio propagation dx toolbox searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. Ionospheric propagation, surface waves and radio noise. This radio propagation prediction software can now be freely used by all manner of radio users including two way radio communications applications, maritime mobile radio communications, radio broadcasters small and large, point to point radio applications, radio amateurs, etc.

Fccoet r861, modern methods for calculating groundwave. Dxprop dxprop is a radiowave propagation forecast freeware for ham radio operators, permits to predict propagation on 12 frequencies. Newest propagation questions amateur radio stack exchange. The software is also available from the ntia website, although ntia only features older versions.

Free professional hf propagation prediction software. Surface wave radio propagation is sensitive to polarization. Focusing on high frequency radio propagation, operation, equipment, as well as amateur ham radio in general. Ground wave propagation is a method of radio wave propagation that uses the area between the surface of the earth and the ionosphere for transmission. Ground surface wave propagation the term surface wave is often incorrectly but interchangeably used with ground wave. Note that ground wave propagation is much less efficient over land than it is over sea because of the much lower conductivity of the ground and other factors. The method incorporates an exponential atmospheric refractivity profile and is the basis for the. A large amount of uv radiation leaves the sun at the speed of light and arrives 8 minutes later. The associated program, for the prediction of ground wave field strength for both. It is the ions that give their name to the ionosphere, but it is the much lighter and more freely moving electrons which are important in terms of high frequency hf. Once youve got a grasp of how high frequency hf and very high frequencyultra high frequency vhfuhf radio waves carry information from a to b, you can optimise your radio network for more dependable communications.

A sid is a blackout of hf sky wave communications that occurs after a solar flair. Ntia does not make any warranty of any kind, express, implied or statutory, including. Is everything i have ever learned on the ground wave topic is a complete nonsense. Using field radio equipment for reliable communications requires you to understand the way radio waves travel. Prediction program show that hf prediction model built with. Ace hf pro is the most advanced and the most accurate high frequency ionospheric radio signal propagation modeling and forecasting software for amateur radio ham radio and shortwave radio listening swling operators, in the world. Acehf is propagation forecasting and modeling for amateur radio as well as for shortwave radio listening and general hf operation. In my experience, hf signals do mostly one of two things. Terrestrial hf ionospheric propagation surface wave ground wave propagation radio noise 2 working party 3l.

Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere. Voacap point to point hf ionospheric communications analysis and prediction program. Pdf hf groundwave over rough seasurface and hf propagation. Surface waves also support the operations of lf broadcasting, vlflf communication and navigation systems, hf shortrange communication and some.

The resource is currently listed in in a single category. Hf propagation radio society of great britain main. Ace hf is propagation forecasting and modeling for amateur radio as well as for shortwave radio listening and general hf operation. The biggest advantage is acehf mobile allows the user to run snr predictions between any two points worldwide.

How to ground power and radiowave frequency in your ham predicting propagation in ham radio with voacap online. Ground wave propagation occurs at lower frequencies and is rarely effective above the 3 mhz band. The fast track to understanding ham radio propagation. Radio signals are affected by terrain elevation between the sites, and obstructions, including trees, buildings, etc. Depending on the attack angle, a sid could last from a few minutes to a few hours. How to ground power and radiowave frequency in your ham.

Any white bubble indicates no suitable frequency or high absorption. The main category is propagation tools that is about propagation prediction software for ham radio. How radio waves propagate in other than straightline paths is a complicated subject. Awardwinning ham radio author michael burnette, af7kb, takes you on a journey through every form of radio wave propagation, from ground waves to propagation in outer space. Ace hf professional propagation software for hf radio operators dx toolbox from blackcat systems searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. Propagation prediction software asaps advanced stand alone prediction system the ips advanced stand alone prediction system asaps allows the prediction of sky wave communication conditions in the hf high frequency and low vhf very high frequency radio spectrum or short wave band 1 to 45 mhz. Ground wave propagation is of special interest for communication. Rotheram 18, 19, 20 explored the influence of the earths atmosphere on surface wave propagation, and went on to develop a generalpurpose groundwave prediction method and an associated computer program. Overview of hf propagation characteristics of hf radio propagation propagation is possible over thousands of miles. If you have no particular preference within a given ham radio band, then simply enter its center frequency i. Many are free, such as the hamcap software from alex shovkoplyas ve3nea.

The science and study of radio wave reflection, refraction. Ground wave propagation occurs, for example, when you contact another station across town on an hf band. Consequently, ranges over land are greatly reduced. The ground wave can propagate a considerable distance over the earths surface particularly in the low frequency and medium frequency portion of the radio spectrum. Ground wave comprises of three distinctively different components. Ntia does not make any warranty of any kind, express, implied or.

Propagation of rf signals american radio relay league. Software for prediction and analysis of ground wave propagation. Whats the difference between how hf and vhfuhf radio. Propagation models and available software are presented and compared. The least accurate are at hf over steep hills, mountainous or densely populated fully developed regions. High frequency radio propagation current optimal frequency. Comparison of hf groundwave propagation models dtic. Predicting propagation in ham radio with voacap online. Ground waves propagate in vertical polarization so vertical antennas.

One important thing to know about this type of propagation is that the maximum distance of ground wave propagation decreases when the signal frequency is increased. It also features several propagation forecasting tools, allowing you to quickly and easily estimate current hf shortwave propagation conditions between any two. Tropospheric branch software collection of various propagation software. Apr 24, 2015 ground surface wave propagation the term surface wave is often incorrectly but interchangeably used with ground wave. The f2 region is the most important region for high frequency radio propagation as. Hf radio waves may travel by any of the following modes. Amateur com munications of up to 50 miles are typically possible via ground wave. Free solarterrestrial data displayed on your web page or site, updated every 3hours. Software, data and validation examples for ionospheric and. Understanding hf vhfuhfshf propagation relative to guided wave, ground wave, direct wave, ionosphere, troposphere, aurora, meteor scatter, and earthmoonearth eme or moon bounce paul l herrman n0nbh 11 july 2010. Hf groundwave field strength predictions by prophet were 3 to 10 db stronger than.

What most people are calling ground wave is actually line of sight propagation and the r. Qst propagation charts propagation charts as they used to appear in qst. It also features several propagation forecasting tools. About hf propagation app for windows the resource is currently listed in in a single category. This holds for any mode of propagation, including ground wave. The online prediction service voacap online is easy. Below vhf see the sidebar on frequency range abbreviations in the hf and mf range, the space wave is still important but another phenomenon becomes significant. Both of these provide a measure of geomagnetic activity, which affects hf propagation. High frequency hf radio ground wave propagation for. Newest propagation questions feed to subscribe to this rss feed, copy and paste. In this article, different modes of propagation are presented first. Factors affecting ground wave propagation are discussed.

High frequency hf radio ground wave propagation for group. Predicting propagation in ham radio with voacap online dummies. Ground wave propagation dx commander ham radio ham. Department of commerce ntiaits institute for telecommunication sciences high frequency propagation models. Just follow the above guidelines and do the best you can. If youve thought propagation is a lot like the weather you can talk about it, but theres nothing you can do about it think again. E, f layer ionospheric refraction at night, when d layer absorption weakens. A portal that hams think of as the first place to go for information, to exchange ideas, and be part of whats happening with ham radio on the internet. Searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. Join katie wy7yl on her tour of one of our ham radio outlet flagship superstores in beautiful plano, texas. Ground waves exist only for vertical polarization, produced by vertical antennas, when the transmitting and receiving antennas are close to the surface of the earth. Htz warfare is a comprehensive tool for modeling all radio communication technologies in the mf hf vhfuhfshfehf frequency bands. Hf propagation conditions can be simulated using radio propagation models, such as the voice of america coverage analysis program, and realtime measurements can be done using chirp transmitters. The software includes electronic warfare and tactical communications functions that allow an accurate simulation of the battlefield for advanced tactical mission planning and the analysis of electromagnetic field elint, comint.

Other places or software programs that predict or tell your otherwise are wrong. It also features several propagation forecasting tools, allowing you to quickly and easily estimate current hf shortwave propagation conditions between any two locations in the world. Ground wave propagation tutorial ground wave propagation is a form of signal propagation where the signal travels over the surface of the ground, and as a result it is used to provide regional coverage on the long and medium wave bands. E3c01 propagation prediction software uses data such as the a index and k index to model propagation. Mar 19, 2020 amateur radio operators may sometimes use ground wave propagation to communicate. Mechanisms of radio wave propagation radio waves can propagate from transmitter to receiver in four ways. It is ideal for relatively short distances during the daytime, 100 to 200 nm, and occasionally out to 400 nm at night. Includes all of the same features as included in ace hf pro, utilizes the same powerful propagation modeling software but with enhanced user capability. Institute for telecommunication sciences resources radio propagation software high frequency high frequency propagation models. Calculating the distance to the horizon radio mobile predict the performance of a radio system from ve2dbe. Acehf professional propagation software for hf radio operators. Dx toolbox from blackcat systems searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation.

The groundwave component of high frequency hf radio propagation is. Radio propagation prediction software electronics notes. High frequency hf propagation models 230 mhz irregular terrain model itm longleyrice 20 mhz 20 ghz if77 wave propagation model gierhartjohnson airground millimeterwave propagation model mpm 1 ghz 1 thz terrain data and extraction routines. They are direct wave space wave ground reflected wave. Acehf professional propagation software for hf radio operators dx toolbox from blackcat systems searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. Demystifying hf radio propagation and modeling check out the ace hf propagation software the latest is version 2.

Includes all of the same features as included in acehf pro, utilizes the same powerful propagation modeling software but with enhanced user capability. It also features several propagation forecasting tools, allowing you to quickly and easily estimate current hf shortwave propagation. Radio mobile rf propagation simulation software radio. Ground wave where the radio signal tends to follow the curvature of the earths surface. The ground wave prediction system gwps provides detailed predictions of surface wave. Radio signal propagation many articles on how radio signals travel great distances at different frequencies. Usable hf frequencies page refreshed every 20 minutes use the indicated color red, yellow, green, blue, white, etc. As a result, the program can predict the ground wave signal level that might be received at a particular point, given the coordinates of the transmitting antenna and. Dx toolbox shortwave ham radio hf radio propagation. This link is listed in our web site directory since thursday mar 31 2011, and till today ground wave signal propagation has been followed for a total of 326. How radio waves propagate in other than straightline paths is a complicated subject, but one that need not be a mystery. When the radio signal travels along the earths surface, how it induces current. Designed for those operators who are mobile and operate from various locations.

The lower the frequency, the better the ground wave. Ground wave propagation basically requires vertically polarized antennas. Ham radio on lf, mw, hf, vhf, and higher hf radio worldwide. Radio propagation prediction software an overview, article, tutorial about the basics of radio propagation prediction software for use on the hf bands for predicting broadcast coverage, as well as the possibility of establishing two way radio communications, maritime mobile radio communications, and for many more applications. I really do not know any explanation for these queries coming in my mind. Vertical polarization is the best type of polarization for ground wave propagation. Radio waves can travel along any surface or interface between two media in which the wave travels with different velocities. This magical world between lineofsight and ionosphere bound signal propagation. Operating on the highfrequency hf ham radio bands can be very exciting as conditions change around the world. In my first years on hf, i quickly found out that understanding propagation and being able to forecast propagation, would give me a substantial advantage. Understanding radio propagation worldwide ham radio. This software is even used by the military and other clients around the world. I was studying ground wave propagation, my book writes the lines about it without explaining it. Surface wave is a subset of ground wave which also includes direct waves and ground reflected waves.

Institute for telecommunication sciences resources radio propagation software radio propagation software. In other words, there is no upper limit to how far radio waves can propagate, though there is a limit on distance imposed by the geometry of the earth. You can almost bet this is a good day for ground wave. Nov 18, 2019 at mf and hf radio bands for terrestrial communication, it is the surface wave that is predominant while the space wave and ground reflected wave plays a negligible role. Topics include sporadic e, sunspots, troposcatter, meteor scatter, sudden ionospheric disturbances, and ground wave propagation. Radiolink propagation prediction calculate path losses of a pointtopoint radio link. Marine mfhf ssb radio guide to long range communications. She will show you the store and introduce some of the staff in this short video.

Kingston amateur radio club propagation prediction. Jan 20, 2020 radio propagation radio propagation is the study of how radio waves travel from a transmitter site to a receiver site through the atmosphere. Created as an extention of goodwill by amateur radio station nw7us. The basic concepts behind hf propagation using the ionosphere are easy to understand, and a study of it is not only fascinating, but also very useful for anyone involved in hf radio communications in any way. Hf radio propagation freeware free download hf radio. Now there are various things which can increase the propagation beyond true line of sight but those are not ground wave. However, let us take a holistic view of the principles of the ground wave propagation scenario before we return our focus to mf and hf ground wave propagation methods. To build the largest and most complete amateur radio community site on the internet. High frequency hf radio ground wave propagation for groupcommunity communications.

Mar 09, 2016 in regard to radio communications, the term ray tracing describes the process of modeling a radio waves path through the ionosphere. For interesting plots of amateur propagation analysis see pages from g3cwi, including scattergrams, chirp soundings, pedersen ray doppler plots. Hf propagation app for windows the dxzone amateur radio. Irregular terrain model itm longleyrice 20 mhz 20 ghz if77 wave propagation model gierhartjohnson air ground. Whats the difference between how hf and vhfuhf radio waves. The downloads made available through links on this page contain software developed by ntia. Ground wave propagation ground wave propagation is a method of radio wave propagation that uses the area between the surface of the earth and the ionosphere for transmission.

Ionospheric propagation is the main mode of radio propagation used in the mf and hf portions of the radio spectrum. Also contains solar and radio propagation information applicable to ham radio including solar conditions, space conditions, online propagation tool, online sn to sfisfi to sn conversion tool, online auroraauroral activity to latitude conversion tool, and online kindex to signal noise. In part 2 we will discuss sky wave and space wave communication. Ground wave propagation must be vertically polarized, and can be adversely affected by terrain or geologic discontinuities between the transmitting station and the receiving station. Radio propagation is the behavior of radio waves as they travel, or are propagated, from one.

This page provides basic understanding of the principles of electromagnetic radiation, the structure of the earths atmosphere and solarterrestrial interactions necessary for a working knowledge of radio propagation. Overview of activities of itur study group 3 on radiowave propagation, 10 april 2014, the hague 3. The program requires interactively entered input values for the radio wave. Ground wave propagation is particularly important on the lf and mf portion of the radio spectrum. Please note the rsgb is not responsible for the content of external websites. The biggest advantage is ace hf mobile allows the user to run snr predictions between any two points worldwide. Here we have discussed about ground wave propagation. It has daily and seasonal variation, as well as a much longer 11 year cycle. Its ideal for the ham radio operator, shortwave listener, or other radio enthusiast, and is available for mac os, mac os x, and windows. The main category is radiowave propagation resources that is about radio wave propagation links for amateur radio. Although the direct wave and the ground reflected wave are not significant at lower frequencies, they play a vital role in terrestrial vhf, uhf, and microwave propagation. Modeling a radio waves path through the ionosphere propagation prediction software uses data such as the a index and k index to model propagation.