Web(Source: Hamilton, D. C., et al., Ring current development during the great geomagnetic storm of February 1986, J. Geophys. Res., 93, 14343, 1988.) For longwave DXers, positive values, or at least those close to zero, are considered best. The first graph shows Dst for the current month. The second graph shows Dst for the last six hours. Web1 day ago · HF Propagation Conditions. Conditions for the Navtex band, 600 meter / 518 kHz. Conditions for the CB / 11 meter band. Solar-Terrestrial Data. U.S. HF Band …
Amateur Radio Signal Propagation Information - kc9aop.net
WebThe best check is always to power up your HF rig and listen on every band to be sure! GRAPHICAL SUN DATA HISTORY. PROPAGATION BASED ON WSPRNET* (ALPHA) Probability of QSO on 23cm between AS and AS is 78%. Probability of QSO on 70cm between AS and AS is 12%. Probability of QSO on 2m between EU and EU is 54%. Web2 days ago · Solar Conditions & Ham Radio Propagation. HF Band Info. Band Daytime Conditions Nighttime Conditions; 80m-40m: Fair: Good; 3.5 - 7.3 MHz: 30m-20m: Fair: Good; 10.1 - 14.35 MHz ... Solar Flux. 143. Overall Solar Activity on 10.7cm. From 62.5 to 300, higher better. Geomagnetic Storm. None. Overall activity of Earth's magnetic field. … flink archetype
10 Meters -- The Forgotten Band? - eHam.net
WebNov 18, 2024 · Six meters runs from 50 to 54 MHz within the USA. As such it sits midway between the HF bands, ending with 30 MHz, and the higher VHF bands, starting with 144 MHz. In that position, it provides virtually all forms of propagation familiar to HF and VHF operators along with a few that are much more prevalent on six meters. WebA Index [ LOW is GOOD ] 1 to 6 is BEST. 7 to 9 is OK. 11 or more is BAD. A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands. K index [ LOW is GOOD ] 0 or 1 is BEST. 2 is OK. WebBecause of some unique free electron effects in the D layer, the D layer normally absorbs the HF frequencies of the 30-meter band (10 MHz) and lower (40m, 60m, 75-80m, 160m). At night the D layer typically dissipates and allows these lower frequencies to propagate further and skip from the higher F-layer. greater good concept