The downloads made available through links on this page contain software developed by ntia. 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. Propagation prediction software uses data such as the a index and k index to model propagation. Medium wave dxers call this stirring the gumbo, when you hear a different than usual mix of stations. I really do not know any explanation for these queries coming in my mind. Mar 15, 2014 theoretical presentation of how hf ground wavecan enhance communications operational securitybetween groups and communities. While listening or planning to work a dx station, the radio amateur would like to know what are the current propagation conditions, know if the propagation is open toward a specific location at a specific time, or at what time the band will be open for a specific pointtopoint circuit. The solarterrestrial system, which forms the skywave propagation. I was studying ground wave propagation, my book writes the lines about it without explaining it. This holds for any mode of propagation, including ground wave.
Ground wave signal propagation resource detail the. Voacap point to point hf ionospheric communications analysis and prediction program. Overview of hf propagation characteristics of hf radio propagation propagation is possible over thousands of miles. Ground wave propagation occurs, for example, when you contact another station across town on an hf band. Mar 19, 2020 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. 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. This version allows the user to analyze the entire hf spectrum using a single fixed transmitter location and multiply receive locations. This radiative ground wave is known as the norton surface wave, or more properly the norton ground wave, because ground waves in radio propagation are not confined to the surface. Pdf hf groundwave over rough seasurface and hf propagation. Amateur com munications of up to 50 miles are typically possible via ground wave.
It also holds for any frequency, including the 40m band. 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. Radio propagation is the behavior of radio waves as they travel, or are propagated, from one. Hf groundwave field strength predictions by prophet were 3 to 10 db stronger than those of the other programs. Surface wave is a subset of ground wave which also includes direct waves and ground reflected waves. Ace hf is propagation forecasting and modeling for amateur radio as well as for shortwave radio listening and general hf operation. Figure 2 basic architecture of a softwaredefined radio system 11. Ace hf system simulation and visualization software, v2.
Tropospheric branch software collection of various propagation software. Usually higher k index values suggest propagation will be poor, however sometimes you can pick up new stations. The ground wave prediction system gwps provides detailed predictions of surface. Mar 28, 2014 propagation path loss models 6 8 rtotrist050 6. Both of these provide a measure of geomagnetic activity, which affects hf propagation. Ground wave propagation must be vertically polarized, and can be adversely affected by terrain or geologic discontinuities between the transmitting. Hf groundwave over rough seasurface and hf propagation. W6elprop predicts ionospheric skywave propagation between any two locations on the earth on frequencies between 3 and 30 mhz. Software, data and validation examples for ionospheric and tropospheric radio. Radio propagation prediction software electronics notes. Describe your experience with the hf propagation prediction software and tell us why you give it the rating you did required.
Pdf reliable and accurate groundwave propagation path loss prediction between a pair of. Hf propagation modeling for stationary tx with positional rx sites. Ground wave propagation is of special interest for communication. 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. Vertical polarization is the best type of polarization for ground wave propagation. 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. So far no one has rated yet, so be the first to rate this link. Kingston amateur radio club propagation prediction. Comparison of hf groundwave propagation models dtic. Includes all of the features offered in ace hf pro. The simulation results of icepacionospheric communication enhanced profile analysis and circuit prediction program show that hf prediction model built with. Another type of surface wave is the nonradiative, boundmode zenneck surface wave or zennecksommerfeld surface wave.
The agreement is renewable and provides all active support customers with free bug fixes and new software revisions as they are release. The main category is radiowave propagation resources that is about radio wave propagation links for amateur radio. Surface wave radio propagation is sensitive to polarization. The resource is currently listed in in a single category. Some of the most useful and concise information is provided by the international radio con sultative committee. An interpretation in terms of an effective earths radius is. 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. Ground wave propagation tutorial electronics notes. Ground wave propagation of the wave follows the contour of earth. Apr 24, 2015 ground surface wave propagation the term surface wave is often incorrectly but interchangeably used with ground wave. Ground wave propagation is particularly important on the lf and mf portion of the radio spectrum.
A ground wave propagation program grwave has been written, and new propagation curves for frequencies from 10khz to 30mhz are given. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Another advantage is ace hf mobile includes a 1 year warranty and support agreement. The main category is propagation tools that is about propagation prediction software for ham radio. Fccoet r861, modern methods for calculating groundwave. Ground wave propagation curves for frequencies between 10 khz and 30 mhz p.
Demystifying hf radio propagation and modeling check out the ace hf propagation software the latest is version 2. 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. Vhf and uhf propagation curves for the frequency range from 30 mhz to 1 000 mhz. Richard and sue buckner teamed with joe ahlgren author of geoclock and steve biro to create a dynamic system simulation and visualization software package which uses the voacap propagation prediction engine to create animated maps and charts to help all users of hf radio choose the best times and frequencies for communications. 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. Acehf propagation prediction software professional pc software for hams that uses voacap and includes area coverage maps animated by time or frequency. Radio propagation software high frequency hf propagation models 230 mhz irregular terrain model itm longleyrice 20 mhz 20 ghz if77 wave propagation model gierhartjohnson airground. Radio signals are affected by terrain elevation between the sites, and obstructions, including trees, buildings, etc. 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. Ntia does not make any warranty of any kind, express, implied or statutory, including, without limitation, the implied warranty of merchantability, fitness for a particular purpose, noninfringement and.
The software is also available from the ntia website, although ntia only features older versions. This software is even used by the military and other clients around the world. The field strength values computed by this program are. Ground wave radio propagation is used to provide relatively local radio communications coverage, especially by radio broadcast stations that require to cover a particular locality. Rf propagation software basics this page covers rf propagation software basics. Applications of the software have included thl determination of sizes of hf array buffer zones and intersite separations. 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. 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 336. Reference atmosphere for refraction note suppressed on 241097 ra97 this recommendation has been replaced by rec. Pdf groundwave modeling and simulation strategies and path. Radio mobile rf propagation simulation software radio.
Short distance ground wave propagation modeling in irregular and. Hf propagation modeling for positional tx with positional rx sites. The least accurate are at hf over steep hills, mountainous or densely populated fully developed regions. Rf propagation software basics rf propagation simulator. Hf radio waves may travel by any of the following modes. About waveguide the resource is currently listed in in 2 categories. High frequency hf propagation models 230 mhz irregular terrain model itm longleyrice 20 mhz 20 ghz if77 wave propagation model gierhartjohnson airground the u. Review of propagation prediction programs voacapbased. Calculating the distance to the horizon radio mobile predict the performance of a radio system from ve2dbe.
Handbook on ground wave propagation iii introduction ground wave propagation is of special interest for communication, particularly broadcasting, at the lower frequencies where the mode has been in use for more than 90 years. The wave sometimes bends due to the earths magnetic field and gets reflected to the receiver. This link is listed in our web site directory since thursday may 9 20, and till today waveguide has been followed for a total of 748 times. The associated program, for the prediction of ground wave field strength for both. Animated communications effectiveness for high frequency. So, if you really want to make a contact via ground wave, use a vertical antenna on the 160m band. Institute for telecommunication sciences resources radio propagation software radio propagation software. A rising a or k index indicates increasing disruption of the geomagnetic field, and generally means that hf propagation will be poor. 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. Some are available as separate computer programs, or as a part of larger frequency planning software. Software, data and validation examples for ionospheric and. Irregular terrain model itm longleyrice 20 mhz 20 ghz if77.
W6elprop predicts ionospheric sky wave propagation between any two locations on the earth on frequencies between 3 and 30 mhz. High frequency hf radio ground wave propagation for group. Propagation models and available software are presented and compared. Wave propagation software, computational science, and reproducible research 3 can be built upon and used as a subroutine in future work. Software for prediction and analysis of ground wave propagation. As we know when the signal is propagated from source to the destination it will incur path loss as well as other losses due to reflection, differaction and scattering. Factors affecting groundwave propagation are discussed. Jan 15, 2015 hf line of sight uses either horizontal or vertical polarization, can be used on all hf bands, does not depend on either ground wave propagation or reflection from the ionosphere. Wave propagation software, computational science, and. Antenna theory types of propagation tutorialspoint. This means that radio waves transmitted at an angle into the sky can be reflected back to earth beyond the horizon. These radio propagation software packages are used by all users of the hf radio communications from broadcasters who need to know the likely coverage areas for their radio transmissions and other professionals radio communications users who need to be able to know which frequencies to use to establish a link to a given area to radio amateurs.