SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 17 May, 2025 T-index: 90 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 22.5 0.0 9.5 ASSSX MMMMMMFFFF FF%%%%.... 14.2 10.3 5.9 00 01 24.9 0.0 10.6 ASSS XMMMMMMMFF FFFF%%%%%. .... 15.8 12.0 6.5 01 02 24.4 0.0 11.2 ASSS SXMMMMMMFF FFFF%%%%.. .... 16.2 13.0 6.8 02 03 24.0 0.0 11.5 ASSS SXXMMMMMFF FFF%%%%%.. .... 15.7 13.6 7.0 03 04 23.4 0.0 11.6 ASSS SXXMMMMMFF FFF%%%%... ... 15.5 13.7 7.0 04 05 23.2 0.0 11.4 ASSS SXXMMMMFFF FFF%%%%... ... 15.3 13.6 6.9 05 06 22.9 0.0 11.0 ASSS XXXMMMMFFF FF%%%%%... ... 15.2 13.1 6.6 06 07 23.2 0.0 10.2 SSSS XXMMMMMMFF FFF%%%%... .... 15.2 12.1 6.1 07 08 22.9 0.0 9.0 SSSXX MMMMMMMMFF FF%%%%%... ... 15.2 10.2 5.4 08 09 20.9 0.0 6.0 ASMMMMM MMMMMMFFFF %%%%%..... . 13.9 5.4 3.8 09 10 16.4 0.0 0.0 XMMMMMMMMM MMMFFF%%%% ...... 11.5 1.9 0.0 10 11 13.3 0.0 0.0 XMMMMMMMMM MFF%%%%... .... 9.2 1.9 0.0 11 12 11.1 0.0 0.0 XMMMMMMMMF F%%%...... 7.7 1.9 0.0 12 13 10.1 0.0 0.0 XMMMMMMMFF %%%..... 6.9 1.9 0.0 13 14 9.2 0.0 0.0 XMMMMMMMF% %%..... 6.6 1.9 0.0 14 15 8.5 0.0 0.0 XMMMMMMF%% %..... 6.2 1.9 0.0 15 16 8.4 0.0 0.0 XMMMMMMF%% %.... 6.2 1.9 0.0 16 17 8.0 0.0 0.0 XMMMMMM%%% %.... 6.1 1.9 0.0 17 18 7.7 0.0 0.0 XMMMMMM%%% %.... 5.7 1.9 0.0 18 19 7.2 0.0 0.0 XMMMMMM%%% ..... 5.0 1.9 0.0 19 20 6.7 0.0 0.0 XMMMMM%%%. .... 4.7 1.9 0.0 20 21 6.6 0.0 0.0 XMMMMM%%%. ... 5.2 1.9 0.0 21 22 9.6 0.0 0.0 XMMMMMMFF% %%.... 5.9 1.9 0.0 22 23 18.5 0.0 7.5 ASSMMM MMFFFFFF%% %.... 11.0 6.5 5.0 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) 17-May-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000