SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 7 January, 2026 T-index: 105 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 13-22 1E 2 1 5 10 15 20 25 30 35 40 2F 29-42 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 13.3 15.9 9.3 SSXXX BBBPP... 7.9 10.6 5.4 00 01 14.4 17.3 10.0 ASSXX XBBBPPE.. 8.4 11.5 5.8 01 02 15.2 18.2 10.4 SSXX XXBBBPPE.. 8.9 12.1 6.1 02 03 15.6 18.7 10.7 SSSX XXBBBPPP.. . 9.4 12.5 6.2 03 04 15.8 18.9 10.8 SSSX XXBBBPPP.. .. 9.6 12.6 6.2 04 05 16.2 18.7 10.7 SSSX XXBBBBPP%. ... 9.9 12.5 6.2 05 06 16.1 18.2 10.5 SSSX XXBBBBPP%. ... 9.8 12.2 6.1 06 07 15.2 17.4 10.0 ASSSX XMBBBPP%%. ... 9.4 11.7 5.9 07 08 14.5 16.1 9.4 ASSSX MBBBPP%%.. .. 9.1 10.7 5.5 08 09 14.1 14.2 8.5 ASSSXM MBBB%%%... . 8.9 9.3 5.0 09 10 13.3 11.1 6.9 SSMMMM MFF%%%%... . 8.6 6.9 4.2 10 11 12.6 2.5 0.0 XMMMMMMMMM FF%%%%.... 8.6 1.7 1.6 11 12 12.0 2.5 0.0 XMMMMMMMMM F%%%%.... 8.4 1.7 0.0 12 13 11.9 2.5 0.0 XMMMMMMMMM F%%%%.... 8.1 1.7 0.0 13 14 11.7 2.5 0.0 XMMMMMMMMF F%%%%.... 7.8 1.7 0.0 14 15 12.0 2.5 0.0 XMMMMMMMMF F%%%%.... 7.7 1.7 0.0 15 16 11.9 2.5 0.0 XMMMMMMMMF F%%%%.... 7.5 1.7 0.0 16 17 11.2 2.5 0.0 XMMMMMMMMF F%%%.... 7.2 1.7 0.0 17 18 9.6 2.5 0.0 XMMMMMMMF% %%.... 6.6 1.7 0.0 18 19 8.9 2.5 0.0 XMMMMMMF%% %%.... 6.2 1.7 0.0 19 20 7.8 2.5 0.0 XMMMMMM%%% .... 5.7 1.7 0.0 20 21 7.7 2.5 0.0 XMMMMMM%%% .... 5.7 1.7 0.0 21 22 10.2 10.7 6.7 ASSXMBB %%%... 6.8 7.1 3.9 22 23 12.2 14.0 8.4 ASSXXB BBPP%... 7.6 9.3 4.9 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) 7-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000