Paul L Herrman
    Sierra Vista, Arizona USA (DM41um)
    Online Propagation Tools/Converters
    n0nbh@n0nbh.com

• Use the buttons at the top and bottom of the page to navigate, or use the following links:
• For Solar-Terrestrial Data banners and widgets (both web page and devices) click here
• For Understanding/Using Solar-Terrestrial Data, Solar Images, and HF Tutorials click here
• For current Space Weather and HF Propagation Conditions, and MUF Maps click here
• I created a printable pdf presentation that contains tutorials and information on understanding radio propagation, and how to use all the data contained in the solar panels. You can download from this link

• For 3,000 kilometer radio signal single hop paths (Courtesy of K1TTT)
• Just click "NOW" as all settings (including location) are auto-populated using the current NOAA solar data indices.
• I resolve and populate your coordinates using your IP address. If not correct, just click your QTH location on map then click "NOW".
• Select desired mode/map/overlays. Key shows bands.
• Click "Next Hour" to advance, or enter desired UTC Date & Time, estimated SF/K/A Index, then click "Compute" for future predictions.

UTC:

• Converts SN to SFI, or SFI to SN. Useful for those programs that require one value, and you only have the other. Also fun to play around with!
• Remember, you are using a measured or observed value to calculate the other using a recognized formula, so the result most likely will not match the other measured value. The solar panel only uses measured/observed values from NOAA.

• Converts K-Index (from 0-9) to the K-Measurement Unit (in nanoTesla or nT) range, the expected HF signal noise level range in "S" units/dB, and the current Geomagnetic Field state
• You can also enter a specific K-nT value (from 0-999), or specific signal noise level in "S"/dB (0-60), or Geomagnetic Field of Quiet, UNSET, Active, or Storm (any case) to get the other values/ranges.
• Great for figuring out how noisy the bands are

• Converts specific Aurora Activity (from 1-10++) to the calculated K-Index (from 0-9), and to the lowest Latitude (North or South Hemisphere) range in Ks that you can expect Auroral activity (either visual or radio frequency)
• You can also enter a specific calculated K-Index (from 0-9), or specific latitude in "°"/Ks (40-90) to get the other values/ranges.
• Great for figuring out when to get outside and look for the northern lights or work VHF Aurora at your location