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IONOSPHERE PROPAGATION FOR HIGH FREQUENCY RADIO COMMUNICATIONS
Hourly Propagation Maps CLICK HERE FOR HF ACTIVITY NETS SKEDS HFNOW GROUP   North America Region - Europe Region - Australia NZ Region - Far East Asia RegionGlobal Map of Optimum NVIS Frequency Maximum Frequency for Communications Within 300 kilometers of Your Location Based upon observed propagation in the past hour, and updated at 40 minutes past the hour. NVIS is best just below the highest frequency which the ionosphere will reflect vertically. This is called foF2. The foF2 measurements from ionosondes around the world are used to create this world map. Based Upon Hourly Ionosphere Soundings All maps are updated at 40 minutes past the hour; click on the maps to zoom and reload. Maps of DX and Regional Optimum Frequencies Based on the previous hour of observed propagation Optimum Frequency Maps Centered on World Cities To use the maps below, locate a map for a city near your QTH and click on it. Follow the color frequency contours to locate an area you wish to communicate with. For optimum signals, tune your radio to the ham band closest to the MHz of the color range indicated by the map.  Updated at 40 minutes past the hour; Click on the maps to zoom and reload. San Francisco Boulder Kansas City Washington DC Whitehorse Montreal London Rome Stockholm Tokyo Sydney Darwin Perth Auckland These maps are made from data gathered in real time around the world using HF ionospheric radar systems called ionosondes. Ionosondes bounce HF radio signals off the ionosphere to measure the height of the reflective zones and signal strength vs frequency. The maps are generated using the ionosonde data to make projections based upon a base station working a mobile. Mapping source: Australian Government IPS Radio and Space Services Updated at 40 minutes past the hour; Click on the maps to zoom and reload. These maps are made from data gathered in real time around the world using HF ionospheric radar systems called ionosondes. Ionosondes bounce HF radio signals off the ionosphere to measure the height of the reflective zones and signal strength vs frequency. The maps are generated using the ionosonde data to make projections based upon a base station working a mobile. To use the maps on this site, locate a map for city near your QTH. Follow the color freqeuncy contours to locate an area you wish to communicate with. For optimum signals, tune your radio to the ham band closest to the MHz of the color range indicated by the map. Mapping source: Australian Government IPS Radio and Space Services Ionospheric HF Propagation Map source: Australian Government IPS Radio and Space Services The members of HFpack wish to express appreciation for the propagation services provided by the Australian Government.

About HFpack: However you spell it, HF pack H.F. Pack H-F pack or HF-pack, HFpack is all about: High Frequency Portable transceivers and HF portable antennas, HF antennas, portable HF antennas. HF SSB/CW/Data. Amateur commercial marine. Handhelds backpacks, carry-ons, HF pack manpacks. Pedestrian and Human Powered Mobiles. Manual and automatic antenna tuning. The HF Portable Antenna is a critical part of the HF portable amateur radio station. HFpack helps operators to choose the right antennas. QRP is an important aspect in HFpack for equipment and antennas. Telescopic tape folding and collapsible antennas, dipole, broadband hf vertical antennas. These are the things that make HFpack an interesting part of the HF operator's resources.  Battery solar crank alternative energy power supplies. Compact lightweight miniature equipment. Handsets headsets microphones earphones keyers. Low power TX/RX techniques. Portable amplifiers. Hiking camping bicycling kayaking and expeditions.