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22 Apr 2016

My radio app

Radio wave reproduction is a very complex course of action. It is impossible to precisely predict how ocean will spread and what values we will calculate at some certain point. Therefore we involve some mathematical models to approximate radio reproduction and to calculate discipline strength values according to predefined probability.

app for radio
The actual propagation model, which is based on electromagnetic principle and on statistical examination of both landscape features and radio measurements, predicts your median attenuation of the radio stations signal as a function of distance and the variability of the signal with time and in space. Dissemination models define shape and formulas. Basic model we can predict propagation in irrelavent distance from the transmitter.

Making use of curves and numerical formulas manually is an extremely tough task. To be able to automate and increase such calculations numerous software tools were created. Normally, radio planning software packages are used by tv stations, mobile operators and also radio frequency authorities. As a result of complexity and few potential customers, the price of this kind of software package can be rather high. But there is one exception to this principle.

Radio Mobile is often a software tool for radio propagation calculation. The article author has decided to publish this under the "freeware" license so that the software is openly available on the web. This software is especially dedicated to amateur stereo, however, it can be additionally used in other areas such as broadcasting and professional mobile communications.

Computations are based on the Longley-Rice distribution model. This is a basic purpose radio propagation model for frequencies between 20 MHz and 20 Ghz. In order to use the software you additionally need terrain style data. This information is needed for calculations regarding effective heights which can be needed to perform dissemination calculations. You can find a number of terrain model information sources on the web. They offer free DTM (Digital Surfaces Model) data that is enough to start working with the Radio Mobile.

Radio Mobile supports numerous fancy features like possibility to use DTM in numerous formats (DTED, SRTM), also in many layers with different decision, possibility to add chart pictures in raster file format (BMP, JPEG, GIF, TIFF, PNG), possibility to estimate interference between radio stations and lots of functions a customized view.

Basic strategy for use consists of entering radio stations with all guidelines (if they are not entered yet) and formula of the coverage. Below you have a lot of options to customize the calculation and look at. Results can be preserved for later use. It is also easy to define calculation stage for coarse data to save some time.

With regard to result display it is almost always not enough to display this on the gray level DTM. You would probably like to see that on some chart. For this purpose you can use any kind of map picture along with known coordinates. The program allows you to enter matches for each picture in order to display it correctly over the DTM.

A very valuable function is the computation of interference in between radio stations. You determine protection ratio as well as minimum field energy for calculation as well as the software marks disturbance area with definite color.

The software can also be very useful for microwave oven link planning. It enables you to display terrain profile between a couple of points, display involving optical visibility through the point and computation of link details. Although this software is free and dedicated pertaining to amateur radio it could be very useful tool with regard to daily radio interaction tasks.


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