SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 15 May, 2025 T-index: 80 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-9 1E 0 1 5 10 15 20 25 30 35 40 2F 21-24 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 21.5 0.0 9.3 ASSSX MMMMMFFFFF F%%%%..... 13.6 10.1 5.8 00 01 23.6 0.0 10.4 SSSS XMMMMMMFFF FFF%%%%%.. ... 15.1 11.8 6.4 01 02 23.2 0.0 11.0 ASSS XXMMMMMMFF FFF%%%%... ... 15.5 12.9 6.7 02 03 22.9 0.0 11.3 ASSS SXXMMMMMFF FF%%%%%... ... 15.1 13.4 6.8 03 04 22.3 0.0 11.4 ASSS SXXMMMMFFF FF%%%%.... .. 14.9 13.6 6.9 04 05 22.1 0.0 11.2 ASSS SXXMMMMFFF FF%%%%.... .. 14.7 13.4 6.7 05 06 21.9 0.0 10.8 ASSS XXMMMMMFFF F%%%%%.... ... 14.7 12.9 6.5 06 07 22.2 0.0 10.1 ASSSS XMMMMMMFFF FF%%%%%... .... 14.6 11.9 6.0 07 08 21.7 0.0 8.8 SSSXX MMMMMMMFFF F%%%%%.... ... 14.5 10.1 5.3 08 09 19.7 0.0 5.9 ASMMMMM MMMMMFFFF% %%%%...... 13.2 5.4 3.8 09 10 15.3 0.0 0.0 XMMMMMMMMM MMMFF%%%%. ...... 10.9 1.9 0.0 10 11 12.4 0.0 0.0 XMMMMMMMMM FF%%%%.... ... 8.6 1.9 0.0 11 12 10.4 0.0 0.0 XMMMMMMMMF %%%...... 7.3 1.9 0.0 12 13 9.5 0.0 0.0 XMMMMMMMF% %%...... 6.6 1.9 0.0 13 14 8.7 0.0 0.0 XMMMMMMF%% %%.... 6.3 1.9 0.0 14 15 8.1 0.0 0.0 XMMMMMMF%% %.... 6.0 1.9 0.0 15 16 8.0 0.0 0.0 XMMMMMM%%% %.... 6.0 1.9 0.0 16 17 7.7 0.0 0.0 XMMMMMM%%% .... 5.9 1.9 0.0 17 18 7.5 0.0 0.0 XMMMMMM%%% ..... 5.6 1.9 0.0 18 19 7.1 0.0 0.0 XMMMMMF%%% ..... 5.0 1.9 0.0 19 20 6.6 0.0 0.0 XMMMMM%%%. .... 4.7 1.9 0.0 20 21 6.5 0.0 0.0 XMMMMM%%%. ... 5.1 1.9 0.0 21 22 9.3 0.0 0.0 XMMMMMMFF% %%.... 5.8 1.9 0.0 22 23 17.7 0.0 7.4 ASSMMM MMFFFFF%%% %.... 10.6 6.4 4.9 23 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT =============================================================================== |. USABLE LESS THAN 50% OF DAYS |% USABLE 50% TO 90% OF DAYS | |B BOTH E and F MODES 90% OF DAYS |M MIXED FIRST AND SECOND F MODES | |F FIRST F MODE ONLY |E E-LAYER PROPAGATION |P 90% E and 50-90% F | |S SECOND MODES ONLY |A HIGH ABSORPTION |X COMPLEX MODES | (c) 15-May-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000