The areas noted in the forecast have the necessary atmospheric conditions to produce tropospheric bending of VHF, UHF and/or microwave radio waves. Tropospheric bending …

This mapshows real-time radio propagation from stations operated near 144 MHz. The map shows activity from the past hour. The map is updated automatically, up to several times per minute. The distance between each end of a hop is the basis for the display drawn on the map.

Tropospheric propagation describes electromagnetic propagation in relation to the troposphere. The service area from a VHF or UHF radio transmitter extends to just beyond the optical horizon, at which point signals start to rapidly reduce in strength.

A Tropo DX mode is any abnormal condition that scatters, reflects or refracts VHF, UHF and/or microwave signals in the troposphere causing changes to their normal coverage. Another name for this is anomalous propagation, or AP for short.

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 …

Search through many DX logs using our powerful log search engine. View a large collection of dynamic propagation information and reports. Tropo Ducting Reports. Chat with other DXers and view real-time spots from DX Summit.

It is an experimental forecast of distant VHF and UHF propagation via the mode called "Tropospheric Ducting". The forecasts are prepared as a service to the DX community & broadcast stations. The areas noted in the forecast have the necessary atmospheric conditions to produce tropospheric bending of UHF or VHF TV and radio waves.

William Hepburn's Daily Tropospheric Ducting Forecast. Hits: 6019 | Votes: 29 | Rating: 7.67. You will find this resource in 2 categories on our links directory. The title of the main category is VHF UHF and it deals mainly with VHF UHF Microwave operating modes for ham radio operators.

2018年9月4日 · At least a week or more of good conditions for Tropo contacts between Hawaii and California. Still nothing heard from west coast hams. Tropo conditions slowly moving to Mexico, maybe some Mexican station will be heard. Also looking to the west from Hawaii to Guam is a forgotten path of Tropo activity.

The areas noted in the forecast have the necessary atmospheric conditions to produce tropospheric bending of VHF, UHF and/or microwave radio waves. Tropospheric bending …