VOACAP (Voice of America Coverage Analysis Program)

A free professional high-frequency (HF) propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA).

This ‘work-in-progress’ guide should get you well started with the software. A more comprehensive discussion about the finer details of using the software can be found in George Lane’s book Signal-to-Noise Predictions Using VOACAP. A User’s Guide. The book is now available on CD-ROM.

There is now also “The Official VOACAP Blog” – well, it’s not too official.

NOTE: Running automated scripts to access VOACAP services is strictly prohibited unless agreed upon in advance with the VOACAP site owners.

VOACAP Online Prediction Services

FOLLOW VOACAP ON TWITTER FOR THE LATEST NEWS

If you wish to keep abreast of the latest developments on the site, follow me on Twitter at: twitter.com/VOACAP.

VOACAP PREDICTIONS FOR MARITIME HF

Using Maritime HF SSB transceivers? I have now launched a VOACAP HF propagation prediction site for Maritime HF communications at http://voacap.com/marine – work’s in progress still. Comments & suggestions welcome.

Point-to-Point Predictions

Coverage Area Maps

11M Point-to-Point Predictions

VOACAP Propagation Planner
Visual tool for HF contesters and DXers

11M Coverage Area Maps

VOACAP DX charts
Predictions for upcoming DXpeditions

VOACAP Greyline

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