SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 12 January, 2026 T-index: 30 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 4.9 5.5 3.0 ABP%. 00 01 5.1 6.0 3.2 BBP. 01 02 5.5 6.3 3.4 BBP.. 02 03 5.8 6.5 3.5 ABP%. 03 04 6.0 6.5 3.5 ABP%.. 04 05 6.2 6.5 3.5 ABB%.. 05 06 6.2 6.4 3.4 BBB%.. 06 07 6.3 6.1 3.3 BBB%.. 07 08 6.1 5.7 3.1 BBF%.. 08 09 5.9 5.1 2.9 ABB%%. 09 10 5.6 4.3 2.5 ABF%%. 10 11 5.5 2.6 1.6 AFFF%%. 11 12 5.3 0.7 0.0 FFFFF%.. 12 13 4.8 0.7 0.0 FFFF%%. 13 14 4.5 0.7 0.0 FFFF%. 14 15 4.3 0.7 0.0 FFFF%. 15 16 4.1 0.7 0.0 FFFF%. 16 17 3.9 0.7 0.0 FFF%.. 17 18 3.5 0.7 0.0 FFF%. 18 19 3.3 0.7 0.0 FFF%. 19 20 3.1 0.7 0.0 FFF.. 20 21 3.3 0.7 0.0 FFF%. 21 22 4.0 3.8 2.2 B%.. 22 23 4.5 4.8 2.7 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) 12-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000