SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 15 November, 2025 T-index: 100 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 6.4 5.9 3.4 BBF%%.. 00 01 6.8 6.4 3.7 ABB%%.. 01 02 7.2 6.8 3.8 ABBF%%. . 02 03 7.6 7.0 3.9 ABBB%%. . 03 04 7.9 7.1 4.0 ABBB%%. .. 04 05 8.0 7.1 3.9 ABBB%%% .. 05 06 7.7 6.9 3.9 ABBF%%. . 06 07 7.5 6.6 3.7 ABBF%%. . 07 08 7.4 6.2 3.5 ABBF%%. . 08 09 7.2 5.5 3.2 BBFF%%. . 09 10 7.1 4.5 2.7 ABFFF%%. 10 11 7.0 1.8 1.2 FFFFF%%.. 11 12 6.6 0.9 0.0 FFFFFF%%. 12 13 6.1 0.9 0.0 FFFFFF%.. 13 14 5.7 0.9 0.0 FFFFF%%. 14 15 5.4 0.9 0.0 FFFFF%.. 15 16 5.3 0.9 0.0 FFFFF%.. 16 17 5.1 0.9 0.0 FFFFF%. 17 18 4.7 0.9 0.0 FFFF%%. 18 19 4.5 0.9 0.0 FFFF%.. 19 20 4.3 0.9 0.0 FFFF%. 20 21 4.6 0.9 0.0 FFFF%.. 21 22 5.3 3.9 2.4 BFF%.. 22 23 5.9 5.2 3.0 ABB%%.. 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) 15-Nov-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000