Tropospheric Ducting Forecast for VHF & UHF Radio & TV

Tropospheric bending extends the range of radio & TV stations well beyond their normal limit and thus increases interference amongst stations as well, How to use the Tropospheric Ducting Forecast Tropospheric DX Modes History of the Tropospheric Ducting Forecast

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DX Info Centre

Tropospheric Ducting , Tropospheric Ducting Forecasts * exclusive to this website * 6-Day forecasts of VHF, UHF & microwave radio & TV anomalous propagation & interference At Jon Harder’s website Real-time Tropospheric Ducting Maps Ionospheric Skip At DXMaps,com website Ionospheric Skip Map: At Solar Terrestrial Dispatch website F2 MUF Map Auroral Scatter At SWPC,NOAA,gov …

Tropospheric Propagation Forecast

Welcome on my new website dedicated to the tropospheric propagation forecast, From Wikipedia about tropospheric radio propagation:, Sudden changes in the atmosphere’s vertical moisture content and temperature profiles can on random occasions make microwave and UHF & VHF signals propagate hundreds of kilometers up to about 2,000 kilometers 1,300 mi—and for ducting mode even farther

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29, 30, 31, Place mouse on map to stop animation, I’m looking for tetrode RS2022CL / TH375 pse email me, F5LEN,

Propagation_Solar_Data

Tropospheric Ducting 6-days Forecast – Europe Tropospheric Ducting 6-days Forecast – North America Real Time Ionospheric T-index – Global Map Real Time Ionospheric foF2 – Global Map the T-index can be regarded as an “equivalent sunspot number” the highest frequency of radio signal that may be reflected back by the F2 layer

VHF Propagation Map

VHF Propagation Map This map shows real-time radio propagation from stations operated near 144 MHz, It uses data gathered by Automatic Packet Reporting System-Internet Service APRS-IS from packet stations in the amateur radio service, The map shows activity from the past hour, Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are likely to be traveling,

TROPOSHPERIC DUCTING FORECASTS

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the reference to tropospheric ducting, The raw data for the maps temperature, humidity & pressure are extracted from the Meteorological Service of Canada’s global weather model, Mr, Hepburn has written a proprietary algorithm which approximately mirrors the atmospheric conditions necessary to produce tropospheric ducting warm dry

Tropospheric Ducting

Tropospheric propagation occurs when signals are reflected scattered or refracted in the troposphere, “Ducting” effects occur primarily because of temperature inversions at a height of between 500m and 1500m, and occasionally up to 3000m, Such inversions are not caused by local “weather” or terrain, but rather by climatic conditions

N5PA Website

This map uses APRS data to compile it’s 144 MHz propagation, Tropo – Tropospheric signals happen in the part of the atmosphere close to the surface and up to about 25,000 feet or 7,620 meters, Such signals are thus directly affected by weather systems up to several hundred miles, A major storm system or a cold front that is approaching can create Tropo openings, As it cools in the

E-skip, tropospheric ducting and other VHF propagation

Tropospheric Ducting prediction map, The first and most common of these phenomena is Tropospheric ducting, This happens in warmer weather when there is a high pressure system nearby and is more prevalent over flat terrain, What happens is a warmer layer forms in the atmosphere above a cool layer, That is why it is also known as “temperature inversion,” This causes a higher refractive …

How to distinguish the propagation mode of VHF, UHF and

Map of tropospheric ducting QSO on 144 MHZ on 12/jul/2021 : Map of marine tropo QSO above 2000 Km, made from D4 on 144 MHz in 2021, Tropospheric scatter, It is also known as a “tropo” although the signal propagation mechanism is totally different from that of tropospheric ducting, In this case the signal is scattered in an area of the troposphere that is visible by both antennas, The

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What Causes Tropospheric Ducting? with picture

An entire branch of enthusiasts has developed around tropospheric ducting and, more broadly, tropospheric propagation, People who attempt to receive signals from long distances via tropospheric ducting are called DXers, The term comes from the radio code DX, which stands for distance, DXers are classified by groups depending on the type of signal they are attempting to detect, These signals

Tropospheric Ducting: Everything You Need to Know

Tropospheric Ducting: Everything You Need to Know, by Richard, Basics, The troposphere is the layer of the atmosphere closest to earth, It is approximately 10km deep on average but can extend to 20km in tropical areas, Tropospheric propagation occurs when signals are reflected scattered or refracted in the troposphere, “Ducting” effects occur primarily because of temperature …