SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Broome Perth Date: 22 October, 2024 T-index: 140 Bearings: 201 24 Distance: 1680 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 13-21 1E 2 1 5 10 15 20 25 30 35 40 2F 29-40 2E 10 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 19.4 16.0 9.6 ASSSX MMMBBBFFF% %... 11.8 10.5 5.6 00 01 20.0 17.6 10.4 SSSS XMMBBBBFF% %%... 12.1 11.6 6.1 01 02 20.1 18.6 10.9 SSSS XXMMBBBBFF %%.. 12.3 12.3 6.4 02 03 20.6 19.2 11.2 ASSS SXMMBBBBBF %%.. 12.8 12.7 6.5 03 04 21.3 19.4 11.3 ASSS SXMMBBBBBF F%%.. 13.0 12.9 6.6 04 05 21.2 19.2 11.2 ASSS SXMMMBBBBF F%%.. 13.2 12.8 6.5 05 06 20.5 18.6 11.0 SSSS XXMMMBBBFF %%... 13.0 12.5 6.3 06 07 19.6 17.7 10.5 SSSS XMMMBBBFF% %... 12.5 11.9 6.1 07 08 18.9 16.2 9.7 ASSSX MMMMBBFF%% %.. 12.2 10.8 5.7 08 09 19.6 13.9 8.6 SSSXM MMMMFFFFF% %... 12.2 9.1 5.1 09 10 18.4 9.5 6.2 ASSMMMM MMMFFFFF%% ... 12.0 5.6 3.9 10 11 17.1 2.7 0.0 XMMMMMMMMM MMFFFFF%%. .. 11.4 1.8 0.0 11 12 16.0 2.7 0.0 XMMMMMMMMM MMFFF%%%.. . 10.7 1.8 0.0 12 13 15.4 2.7 0.0 XMMMMMMMMM MFFFF%%... 10.0 1.8 0.0 13 14 14.6 2.7 0.0 XMMMMMMMMM FFFF%%%... . 9.2 1.8 0.0 14 15 13.8 2.7 0.0 XMMMMMMMMM FFF%%%.... . 8.6 1.8 0.0 15 16 13.1 2.7 0.0 XMMMMMMMMM FFF%%..... 8.2 1.8 0.0 16 17 12.3 2.7 0.0 XMMMMMMMMF FF%%..... 7.8 1.8 0.0 17 18 10.5 2.7 0.0 XMMMMMMMMF %%%.... 7.4 1.8 0.0 18 19 9.2 2.7 0.0 XMMMMMMMF% %.... 6.8 1.8 0.0 19 20 8.9 2.7 0.0 XMMMMMMM%% %.... 6.6 1.8 0.0 20 21 9.6 2.7 0.0 XMMMMMMMF% %%.... 6.9 1.8 0.0 21 22 13.8 8.7 5.8 ASMMMMM FFF%%%.... 8.8 5.4 3.5 22 23 18.1 13.6 8.4 ASSSMM MMBFFFFF%% .. 10.8 8.9 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) 22-Oct-2024 BoM Space Weather Services, Sydney Australia +61-2-9213-8000