SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 23 January, 2026 T-index: 70 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 5.0 3.9 2.9 AF%%.. 00 01 5.3 4.2 3.2 BF%.. 01 02 5.7 4.5 3.3 BF%%. 02 03 6.1 4.6 3.4 BFF%.. 03 04 6.3 4.7 3.4 BFF%.. 04 05 6.5 4.7 3.4 BFF%%. 05 06 6.4 4.6 3.4 BFF%%. 06 07 6.2 4.4 3.2 BFF%%. 07 08 6.0 4.1 3.1 BF%%.. 08 09 5.9 3.7 2.8 AFF%%.. 09 10 5.6 3.1 2.4 BFF%%. 10 11 5.4 1.7 1.5 AFFF%%. 11 12 5.2 0.6 0.0 FFFFF%.. 12 13 4.9 0.6 0.0 FFFF%%. 13 14 4.7 0.6 0.0 FFFF%%. 14 15 4.6 0.6 0.0 FFFF%%. 15 16 4.4 0.6 0.0 FFFF%.. 16 17 4.2 0.6 0.0 FFFF%. 17 18 4.0 0.6 0.0 FFF%%. 18 19 3.9 0.6 0.0 FFF%.. 19 20 3.6 0.6 0.0 FFF%. 20 21 3.6 0.6 0.0 FFF%. 21 22 4.0 2.5 2.0 AF%%. 22 23 4.5 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) 23-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000