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HomeProducts and ServicesClient SupportStockholm RadioDaily HAP Charts Sunday, Apr 27 2025 16:35 UT
Client Support

Daily HAP Charts

Stockholm Radio

These are Daily Area Predictions of communication frequencies for the present day and are based on ASWFC average maps of the ionosphere.

Follow the steps below to obtain your daily HAP charts.

Step 1: Select a Location

Step 2: Select a Universal Time (UT) Period

Step 3: Display HAP Chart or Clear selections

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