SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 3 October, 2026 T-index: 45 Bearings: 15 195 Distance: 196 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F/1E: Near 90 1 5 10 15 20 25 30 35 40 ** NONE ** UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.5 3.5 2.6 AFF%. 00 01 5.8 3.9 2.9 AFF%%. 01 02 6.1 4.2 3.0 ABFF%. 02 03 6.3 4.4 3.1 BFF%.. 03 04 6.6 4.4 3.2 BFF%%. 04 05 6.7 4.4 3.2 BFF%%. 05 06 6.6 4.3 3.1 BFF%%. 06 07 6.4 4.1 3.0 ABFF%.. 07 08 6.1 3.8 2.8 AFFF%. 08 09 5.9 3.3 2.5 AFF%%. 09 10 5.4 2.3 1.8 AFFF%%. 10 11 4.7 0.5 0.0 FFFF%%.. 11 12 4.2 0.5 0.0 FFFF%.. 12 13 3.8 0.5 0.0 FFF%%. 13 14 3.6 0.5 0.0 FFF%.. 14 15 3.7 0.5 0.0 FFF%. 15 16 3.5 0.5 0.0 FFF%. 16 17 3.5 0.5 0.0 FFF%. 17 18 3.4 0.5 0.0 FFF%. 18 19 3.2 0.5 0.0 FFF%. 19 20 3.0 0.5 0.0 FF%. 20 21 3.1 0.5 0.0 FFF. 21 22 3.8 0.5 0.0 FFF%. 22 23 4.8 2.8 2.2 FF%. 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) 3-Oct-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000