SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 10 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 13-19 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 13.0 15.1 8.7 SSXXM BBPPP%... 7.9 10.0 5.1 00 01 13.8 16.5 9.3 SSSXX BBBPPP... 8.1 11.0 5.4 01 02 14.6 17.4 9.8 ASSXX XBBBPPP... . 8.8 11.6 5.7 02 03 15.3 17.9 10.0 ASSSX XBBBBPP%.. ... 9.4 11.9 5.8 03 04 16.0 18.1 10.1 ASSSX XXBBBPPP%. .... 9.8 12.1 5.9 04 05 16.4 18.0 10.0 ASSSX XMBBBBPP%. .... 10.0 12.0 5.8 05 06 16.1 17.5 9.8 ASSSX XMBBBBP%%% .... 9.9 11.7 5.7 06 07 15.2 16.6 9.4 ASSSX XMBBBP%%%. .... 9.5 11.2 5.5 07 08 14.4 15.3 8.8 SSSXX MBBBP%%%.. .. 9.2 10.2 5.1 08 09 14.5 13.3 7.8 ASSXMM MBBF%%%%.. .. 9.2 8.8 4.6 09 10 13.2 9.9 6.1 ASSMMMM MFF%%%%... .. 8.9 6.0 3.8 10 11 12.0 2.3 0.0 XMMMMMMMMM M%%%%%%... .. 8.3 1.5 0.0 11 12 10.8 2.3 0.0 XMMMMMMMMM %%%%%..... 7.5 1.5 0.0 12 13 9.8 2.3 0.0 XMMMMMMMM% %%%%.... 6.8 1.5 0.0 13 14 9.8 2.3 0.0 XMMMMMMMF% %%%.... 6.6 1.5 0.0 14 15 10.2 2.3 0.0 XMMMMMMMFF %%%.... 6.6 1.5 0.0 15 16 10.5 2.3 0.0 XMMMMMMMFF %%%..... 6.6 1.5 0.0 16 17 9.5 2.3 0.0 XMMMMMMMF% %%.... 6.3 1.5 0.0 17 18 8.1 2.3 0.0 XMMMMMMF%% %.... 6.0 1.5 0.0 18 19 7.1 2.3 0.0 XMMMMMF%%% .... 5.5 1.5 0.0 19 20 6.9 2.3 0.0 XMMMMM%%%% .... 5.4 1.5 0.0 20 21 7.2 2.3 0.0 XMMMMMM%%% .... 5.5 1.5 0.0 21 22 10.2 9.4 5.8 SSXMMBF %%%%.... 6.9 6.1 3.4 22 23 12.5 13.1 7.7 ASSXMB BBP%%%.. 7.5 8.6 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) 10-Nov-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000