SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 29 January, 2026 T-index: 125 Bearings: 331 152 Distance: 386 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 52-64 1E 24 1 5 10 15 20 25 30 35 40 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 6.7 6.1 3.5 ABB%%.. 00 01 7.1 6.6 3.8 ABBF%.. . 01 02 7.4 7.0 4.0 ABBB%%. . 02 03 7.8 7.2 4.1 BBB%%. . 03 04 8.0 7.3 4.1 BBB%%. .. 04 05 8.0 7.2 4.1 BBB%%. .. 05 06 7.9 7.1 4.0 ABBB%%. . 06 07 7.7 6.8 3.9 ABBF%%. . 07 08 7.5 6.3 3.7 ABBF%%. . 08 09 7.2 5.6 3.3 BBFF%%. 09 10 7.3 4.6 2.8 ABFFF%.. 10 11 7.2 1.7 1.2 FFFFFF%.. 11 12 7.1 1.0 0.0 BFFFFFF%. 12 13 6.9 1.0 0.0 BFFFFF%%. 13 14 6.4 1.0 0.0 BFFFFF%.. 14 15 6.1 1.0 0.0 BFFFFF%. 15 16 5.9 1.0 0.0 BFFFF%%. 16 17 5.6 1.0 0.0 BFFFF%.. 17 18 4.9 1.0 0.0 BFFF%%. 18 19 4.4 1.0 0.0 BFFF%. 19 20 4.1 1.0 0.0 BFFF%. 20 21 4.1 1.0 0.0 BFFF%. 21 22 4.9 3.9 2.5 AF%%. 22 23 6.0 5.3 3.2 BB%%.. 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) 29-Jan-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000