SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 22 January, 2026 T-index: 50 Bearings: 331 152 Distance: 386 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 51-62 1E 24 1 5 10 15 20 25 30 35 40 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.1 5.6 3.1 BB%.. 00 01 5.4 6.1 3.4 BBP%. 01 02 5.7 6.4 3.5 ABP%.. 02 03 6.1 6.6 3.6 ABB%.. 03 04 6.4 6.7 3.6 ABB%.. 04 05 6.5 6.7 3.6 ABB%%. 05 06 6.5 6.5 3.5 ABB%%. 06 07 6.4 6.2 3.4 BBB%%. 07 08 6.2 5.8 3.2 BBF%.. 08 09 6.0 5.2 3.0 ABB%%.. 09 10 5.8 4.3 2.5 ABF%%. 10 11 5.6 2.2 1.4 BFFF%%. 11 12 5.3 0.8 0.0 FFFFF%.. 12 13 4.9 0.8 0.0 FFFF%%. 13 14 4.6 0.8 0.0 FFFF%%. 14 15 4.5 0.8 0.0 FFFF%.. 15 16 4.3 0.8 0.0 FFFF%. 16 17 4.1 0.8 0.0 FFFF%. 17 18 3.8 0.8 0.0 FFF%.. 18 19 3.6 0.8 0.0 FFF%. 19 20 3.4 0.8 0.0 FFF%. 20 21 3.5 0.8 0.0 FFF%. 21 22 4.1 3.8 2.2 BF%. 22 23 4.7 4.9 2.8 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) 22-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000