SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 13 October, 2026 T-index: 35 Bearings: 331 152 Distance: 386 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 51-59 1E 24 1 5 10 15 20 25 30 35 40 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.5 5.2 2.9 ABB%.. 00 01 5.9 5.8 3.2 BB%%. 01 02 6.0 6.1 3.3 BBP%. 02 03 6.2 6.4 3.4 BBB%.. 03 04 6.6 6.5 3.5 ABB%%. 04 05 6.7 6.4 3.4 BBB%%.. 05 06 6.7 6.3 3.4 BBB%%. 06 07 6.5 6.0 3.2 BBB%%. 07 08 6.2 5.5 3.0 ABBF%.. 08 09 6.1 4.8 2.7 ABFF%.. 09 10 5.6 3.5 2.1 BFF%%.. 10 11 5.0 0.7 0.0 FFFF%%.. 11 12 4.4 0.7 0.0 FFFF%.. 12 13 3.9 0.7 0.0 FFF%%. 13 14 3.6 0.7 0.0 FFF%.. 14 15 3.6 0.7 0.0 FFF%. 15 16 3.5 0.7 0.0 FFF%. 16 17 3.4 0.7 0.0 FFF%. 17 18 3.3 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 3.1 0.7 0.0 FFF.. 21 22 4.1 2.3 1.4 BFF%. 22 23 5.0 4.3 2.5 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) 13-Oct-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000