Sunday, July 23, 2017

DIY VOACAP HF Propagation Predictions for DXpeditions

I am happy to announce that VOACAP Online has now an option to offer do-it-yourself HF propagation predictions, suitable for the websites of DXpeditions (and for other needs, too).

If you wish to embed the propagation prediction component in your pages, just use the following code:

NOTE: the code is one big line, no linebreaks as in this example!
CLICK IMAGE TO ENLARGE!

where:

CALLSIGN (parameter "c") = the callsign of the DXpedition (the Transmitter site)
TXLOCATOR (parameter "l", like Lima) = the Maidenhead Grid Locator for the Transmitter site. To find your grid locator, please see: www.voacap.com/qth.html
YEAR (parameter "y") = the year the DXpedition is taking place, e.g. 2017
MONTH-NUMBER (parameter "m") = the number of month when the DXpedition is taking place, e.g. for July, MONTH-NUMBER is 7.
TXPOWER (parameter "p") = the transmitting power in kilowatts, e.g. 1.5
MODE (parameter "me") = either CW or SSB. If you will use both, set this parameter to CW.

So, when all the components are in place, the complete code might look like this (the example below is for the Bouvet DXpedition in February 2018):

NOTE: the code is one big line, no linebreaks as in this example!
CLICK IMAGE TO ENLARGE!

The layout on your page will be something like this (enter your grid locator in the field, press "Run", and see the results!):

The graphical predictions will be similar to this:

Overview of the prediction in terms of Reliability (REL), Signal Strength (S DBW) and MUFday, followed by band-specific predictions, from 80 Meters to 10 Meters, Short-Path (SP) and Long-Path (LP). The charts are all interactive as you hover the mouse over them.

The service is offered to the ham community free-of-charge. If you are using this component as part of your webpages, I would like to hear from you!

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