Propagation
Curated resources and links
| Resource Name | Description |
|---|---|
| Digimode Automatic Propagation Reporter | This started out as a project to automatically gather reception records of digimode activity and then make those records available in near realtime to interested parties — typically the amateur who initiated the communication. The way that it works is that many amateurs will run a client that will monitor received traffic for callsigns (the pattern 'de callsign callsign') and, when seen, will report this fact. This is of interest to the amateur who transmitted adn they will be able to see where their signal was received. The pattern chosen is typically part of a standard CQ call. The duplicate check is to make sure that the callsign is not corrupted. The rules for protocols like FT8 are different as the callsigns are protected by error correction. You do still need to call CQ in order for your signal to be reported. |
| DXMAPS 4.2 - QSO/SWL real time information | DXMAPS 4.2 - QSO/SWL real time information |
| HFGCS Quick Tune SDR List | Use the list below to quickly tune to the most used US Air Force High Frequency Global Communications System (HFGCS) frequencis as received directly by internet software defined radio (SDR) sites. Simply find the location you want and click on the frequency to open a receiver in a new browser tab. Sites below are selected by receiver performance and proximity to HFGCS transmitters. Frequencies 4724, 6739, 8992, and 11175 are the primary and secondary ones used for EAM and SKYKING broadcasts, though there are times when the E6 TACAMO or E4 NAOC aircraft can be heard elsewhere. If there is a training exercise or real-world battle, hunt around other frequencies, such as 6697, 8776, or 11244. |
| KFS WebSDR Half Moon Bay | Welcome to the KFS WebSDR HF radio receiver system located six miles south of Half Moon Bay, California USA. This facility is maintained by Craig, W6DRZ, e-mail w6drz@arrl.net. To find out about recent changes to this system, click here. A complete technical description, operating tips, updated propagation information, and a donation opportunity can all be found on the ABOUT page. More information on the worldwide WebSDR project can be found on www.websdr.org. |
| Mapping Radio Coverage, And Viewing It In Google Earth | Mapping Radio Coverage, And Viewing It In Google Earth |
| Reeverse Beacon Network | The Reverse Beacon Network is a revolutionary new idea. Instead of beacons actively transmitting signals, the RBN is a network of stations listening to the bands and reporting what stations they hear, when and how well. |
| SPACE WEATHER PREDICTION CENTER | SPACE WEATHER PREDICTION CENTER NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION |