SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 26 November, 2025 T-index: 72 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 5.2 3.9 3.0 AFF%.. 00 01 5.6 4.3 3.2 BF%%.. 01 02 6.1 4.5 3.3 BFF%.. 02 03 6.5 4.6 3.4 BFF%%. 03 04 6.8 4.7 3.4 BFF%%.. 04 05 6.9 4.7 3.4 BFF%%.. 05 06 6.7 4.6 3.4 BFF%%.. 06 07 6.5 4.4 3.3 BFF%%.. 07 08 6.4 4.1 3.1 BFF%%.. 08 09 6.3 3.7 2.8 AFFF%%. 09 10 6.0 3.1 2.4 BFF%%%. 10 11 5.8 1.9 1.6 AFFF%%.. 11 12 5.4 0.6 0.0 FFFFF%%. 12 13 5.0 0.6 0.0 FFFF%%.. 13 14 4.8 0.6 0.0 FFFF%%. 14 15 4.7 0.6 0.0 FFFF%%. 15 16 4.6 0.6 0.0 FFFF%.. 16 17 4.4 0.6 0.0 FFFF%. 17 18 4.3 0.6 0.0 FFFF%. 18 19 4.2 0.6 0.0 FFFF.. 19 20 4.0 0.6 0.0 FFF%.. 20 21 4.1 0.6 0.0 FFFF.. 21 22 4.6 2.6 2.1 FF%.. 22 23 4.9 3.4 2.6 AF%%. 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) 26-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000