SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 3 November, 2026 T-index: 25 Bearings: 331 152 Distance: 386 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 51-60 1E 24 1 5 10 15 20 25 30 35 40 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.1 5.3 2.9 ABB%. 00 01 5.5 5.8 3.2 BB%.. 01 02 5.7 6.1 3.3 BBP%. 02 03 6.1 6.3 3.4 BBB%.. 03 04 6.4 6.4 3.4 BBB%%. 04 05 6.5 6.4 3.4 BBB%%. 05 06 6.5 6.2 3.4 BBB%%. 06 07 6.5 6.0 3.2 BBB%%. 07 08 6.3 5.6 3.0 ABBF%.. 08 09 6.2 4.9 2.7 ABFF%.. 09 10 5.9 3.9 2.3 BFF%%.. 10 11 5.5 0.7 0.0 FFFFF%%. 11 12 4.9 0.7 0.0 FFFF%%. 12 13 4.3 0.7 0.0 FFFF%.. 13 14 3.9 0.7 0.0 FFF%%. 14 15 3.8 0.7 0.0 FFF%. 15 16 3.7 0.7 0.0 FFF%. 16 17 3.6 0.7 0.0 FFF%. 17 18 3.4 0.7 0.0 FFF%. 18 19 3.2 0.7 0.0 FFF.. 19 20 3.0 0.7 0.0 FF%.. 20 21 3.3 0.7 0.0 FFF%. 21 22 4.2 3.2 1.9 ABF%. 22 23 4.7 4.6 2.6 AB%.. 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-Nov-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000