SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 16 February, 2026 T-index: 90 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 29-38 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 13.6 15.3 8.9 SSSXX BBBPP%%... 8.4 10.1 5.2 00 01 14.5 16.8 9.6 ASSXX XBBBPP%%.. . 8.8 11.1 5.6 01 02 15.1 17.7 10.1 ASSSX XBBBBPP%.. .. 9.2 11.8 5.9 02 03 16.3 18.3 10.3 ASSSX XXBBBBPP%. ... 9.8 12.1 6.0 03 04 16.5 18.5 10.4 SSSX XXBBBBPP%. .... 10.0 12.3 6.1 04 05 16.9 18.3 10.3 ASSSS XXBBBBPP%% .... 10.1 12.2 6.0 05 06 16.7 17.8 10.1 ASSSS XMBBBBP%%% ..... 10.2 11.9 5.9 06 07 16.2 16.9 9.7 ASSSX XMBBBB%%%% ..... 10.0 11.3 5.6 07 08 15.5 15.5 9.0 SSSXX MMBBB%%%%. .... 9.8 10.3 5.3 08 09 14.8 13.3 7.9 ASSXMM MMBF%%%%.. ... 9.4 8.8 4.7 09 10 13.9 9.3 5.9 ASMMMMM MFF%%%%%.. .. 9.0 5.5 3.7 10 11 12.8 2.4 0.0 XMMMMMMMMM MF%%%%%... .. 8.6 1.6 0.0 11 12 11.7 2.4 0.0 XMMMMMMMMM F%%%%..... 7.9 1.6 0.0 12 13 10.9 2.4 0.0 XMMMMMMMMF %%%%..... 7.4 1.6 0.0 13 14 10.0 2.4 0.0 XMMMMMMMF% %%%.... 6.8 1.6 0.0 14 15 10.1 2.4 0.0 XMMMMMMMFF %%%... 6.7 1.6 0.0 15 16 10.3 2.4 0.0 XMMMMMMMFF %%%.... 6.7 1.6 0.0 16 17 10.0 2.4 0.0 XMMMMMMMF% %%%... 6.5 1.6 0.0 17 18 8.8 2.4 0.0 XMMMMMMF%% %.... 6.2 1.6 0.0 18 19 7.8 2.4 0.0 XMMMMMM%%% %.... 5.8 1.6 0.0 19 20 6.9 2.4 0.0 XMMMMM%%%. ... 5.3 1.6 0.0 20 21 6.5 2.4 0.0 XMMMMM%%%. .. 5.1 1.6 0.0 21 22 8.7 8.6 5.5 SSMMB%% %.... 6.0 5.5 3.3 22 23 12.3 13.0 7.8 ASSXMB BBP%%... 7.4 8.6 4.6 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) 16-Feb-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000