SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 9 March, 2026 T-index: 95 Bearings: 331 152 Distance: 386 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 51-60 1E 24 1 5 10 15 20 25 30 35 40 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 6.9 5.5 3.2 BBF%%. 00 01 7.5 6.1 3.5 ABBF%%. 01 02 7.9 6.6 3.7 ABBF%%. . 02 03 8.2 6.8 3.8 ABBFF%. . 03 04 8.5 6.9 3.8 ABBFF%% . 04 05 8.7 6.9 3.8 ABBFF%% .. 05 06 8.7 6.7 3.7 ABBFF%% .. 06 07 8.5 6.3 3.6 ABBFF%% .. 07 08 8.3 5.8 3.3 BBFFF%% . 08 09 8.0 5.0 2.9 ABBFF%%. . 09 10 7.5 3.5 2.1 BFFFF%%. . 10 11 6.9 0.9 0.0 FFFFFF%%.. 11 12 6.2 0.9 0.0 FFFFFF%.. 12 13 5.6 0.9 0.0 FFFFF%%. 13 14 5.1 0.9 0.0 FFFFF%.. 14 15 4.9 0.9 0.0 FFFF%%. 15 16 4.8 0.9 0.0 FFFF%%. 16 17 4.6 0.9 0.0 FFFF%.. 17 18 4.4 0.9 0.0 FFFF%. 18 19 4.1 0.9 0.0 FFFF%. 19 20 3.9 0.9 0.0 FFF%.. 20 21 3.8 0.9 0.0 FFF%.. 21 22 4.4 0.9 0.0 FFFF%. 22 23 6.0 4.5 2.7 ABF%%. 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) 9-Mar-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000