SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 11 February, 2026 T-index: 100 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 12-19 1E 2 1 5 10 15 20 25 30 35 40 2F 29-39 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 13.8 15.5 9.1 SSSXX BBBPP%%... 8.5 10.3 5.3 00 01 14.6 17.0 9.8 ASSXX XBBBPPP%.. . 8.9 11.3 5.7 01 02 15.2 17.9 10.3 ASSSX XBBBBPP%.. .. 9.3 11.9 6.0 02 03 16.3 18.5 10.5 SSSX XXBBBBPP%. ... 9.8 12.3 6.1 03 04 16.5 18.7 10.6 SSSX XXBBBBPP%. ... 10.0 12.4 6.2 04 05 17.0 18.5 10.5 SSSS XXBBBBPP%% .... 10.1 12.4 6.1 05 06 17.1 18.0 10.3 ASSSS XXMBBBBP%% ..... 10.3 12.1 6.0 06 07 16.5 17.1 9.9 ASSSX XMBBBBP%%% ..... 10.0 11.5 5.7 07 08 15.7 15.7 9.2 SSSSX MMBBB%%%%. .... 9.8 10.5 5.4 08 09 14.9 13.6 8.1 ASSSMM MBBF%%%%.. ... 9.3 8.9 4.8 09 10 14.1 9.8 6.2 ASSMMMM MFFF%%%%.. .. 9.2 5.9 3.8 10 11 13.2 2.5 0.0 XMMMMMMMMM MFF%%%%... .. 8.9 1.6 0.0 11 12 12.3 2.5 0.0 XMMMMMMMMM FF%%%%.... 8.3 1.6 0.0 12 13 11.6 2.5 0.0 XMMMMMMMMM F%%%%.... 7.9 1.6 0.0 13 14 10.8 2.5 0.0 XMMMMMMMMF %%%%... 7.2 1.6 0.0 14 15 10.7 2.5 0.0 XMMMMMMMFF %%%.... 7.1 1.6 0.0 15 16 10.9 2.5 0.0 XMMMMMMMFF %%%%... 7.0 1.6 0.0 16 17 10.5 2.5 0.0 XMMMMMMMFF %%%.... 6.9 1.6 0.0 17 18 9.2 2.5 0.0 XMMMMMMMF% %%.... 6.4 1.6 0.0 18 19 8.2 2.5 0.0 XMMMMMMF%% %.... 6.0 1.6 0.0 19 20 7.3 2.5 0.0 XMMMMMF%%% ... 5.5 1.6 0.0 20 21 6.9 2.5 0.0 XMMMMM%%%. ... 5.3 1.6 0.0 21 22 9.1 9.1 5.8 ASMMBB% %%... 6.2 5.9 3.5 22 23 12.6 13.3 8.0 ASSXMB BBP%%... 7.6 8.8 4.7 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) 11-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000