SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 13 November, 2026 T-index: 70 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 13-20 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 12.7 15.2 8.7 SSXXX BBPPP%... 7.8 10.1 5.1 00 01 13.8 16.5 9.4 ASSXX BBBPPP... 8.1 11.0 5.5 01 02 14.6 17.4 9.8 ASSXX XBBBPPP... 8.7 11.6 5.7 02 03 15.0 17.9 10.0 ASSSX XBBBPPP%.. .. 9.3 11.9 5.8 03 04 15.6 18.1 10.1 ASSSX XXBBBPPP%. ... 9.6 12.1 5.9 04 05 16.0 18.0 10.0 ASSSX XMBBBPPP%. .... 9.8 12.0 5.8 05 06 15.8 17.5 9.8 ASSSX XMBBBPP%%. .... 9.7 11.7 5.7 06 07 14.9 16.6 9.4 ASSSX XMBBPP%%%. .... 9.3 11.2 5.5 07 08 14.1 15.3 8.8 SSSXX MBBBP%%%.. .. 9.1 10.2 5.1 08 09 14.2 13.4 7.8 ASSXMM MBBF%%%%.. .. 9.1 8.8 4.6 09 10 13.2 10.1 6.2 ASSMMMM MFF%%%%... .. 8.7 6.1 3.8 10 11 12.2 2.3 0.0 XMMMMMMMMM MF%%%%%... .. 8.3 1.5 0.0 11 12 10.9 2.3 0.0 XMMMMMMMMM %%%%%..... 7.5 1.5 0.0 12 13 10.0 2.3 0.0 XMMMMMMMM% %%%..... 6.8 1.5 0.0 13 14 10.0 2.3 0.0 XMMMMMMMF% %%%.... 6.6 1.5 0.0 14 15 10.3 2.3 0.0 XMMMMMMMFF %%%.... 6.7 1.5 0.0 15 16 10.6 2.3 0.0 XMMMMMMMFF %%%%.... 6.7 1.5 0.0 16 17 9.6 2.3 0.0 XMMMMMMMF% %%.... 6.3 1.5 0.0 17 18 8.2 2.3 0.0 XMMMMMMF%% %.... 6.0 1.5 0.0 18 19 7.1 2.3 0.0 XMMMMMM%%% ..... 5.6 1.5 0.0 19 20 7.0 2.3 0.0 XMMMMM%%%% .... 5.5 1.5 0.0 20 21 7.2 2.3 0.0 XMMMMMM%%% ..... 5.6 1.5 0.0 21 22 10.2 9.5 5.9 ASXMMBF %%%%.... 6.9 6.2 3.5 22 23 12.2 13.1 7.7 ASSXMB BBP%%... 7.4 8.7 4.5 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) 13-Nov-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000