SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Bunbury Perth Date: 1 January, 2026 T-index: 120 Bearings: 8 188 Distance: 155 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 6.0 3.8 3.1 FF%%.. 00 01 6.4 4.2 3.3 BFF%... 01 02 6.8 4.4 3.5 AFF%%.. 02 03 7.1 4.5 3.6 AFFF%.. 03 04 7.3 4.6 3.6 AFFF%.. 04 05 7.4 4.6 3.6 AFFF%%. 05 06 7.2 4.5 3.6 AFFF%%. 06 07 7.0 4.3 3.4 BFF%%.. 07 08 6.9 4.0 3.3 BFF%%.. 08 09 6.7 3.6 3.0 AFFF%%. 09 10 6.6 3.1 2.6 AFFF%%. 10 11 6.6 2.0 1.8 AFFFF%%. 11 12 6.5 0.6 0.0 FFFFFF%.. 12 13 6.3 0.6 0.0 FFFFFF%. 13 14 6.1 0.6 0.0 FFFFFF%. 14 15 5.9 0.6 0.0 FFFFF%%. 15 16 5.7 0.6 0.0 FFFFF%.. 16 17 5.4 0.6 0.0 FFFFF%. 17 18 4.9 0.6 0.0 FFFF%%. 18 19 4.5 0.6 0.0 FFFF%. 19 20 4.2 0.6 0.0 FFFF%. 20 21 4.2 0.6 0.0 FFFF%. 21 22 4.9 2.6 2.3 FF%%. 22 23 5.6 3.4 2.8 AFF%.. 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) 1-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000