SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 16 May, 2025 T-index: 90 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-42 1E 15 1 5 10 15 20 25 30 35 40 2F 58-61 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 9.0 6.3 3.2 AMMMMM%% .. 7.4 3.7 2.6 00 01 10.3 7.5 3.7 AXMMMMMM %%. 8.6 4.5 3.0 01 02 11.1 8.2 4.0 XMMMMMM F%... 9.3 5.0 3.2 02 03 11.3 8.6 4.1 SXMMMMM F%... 9.4 5.3 3.3 03 04 10.8 8.7 4.2 SXMMMMM %%.. 9.2 5.3 3.3 04 05 10.7 8.6 4.1 SXMMMMM %%.. 9.3 5.2 3.3 05 06 10.9 8.3 4.0 XMMMMMM M%.. 9.4 5.0 3.2 06 07 11.0 7.6 3.7 AXMMMMMM M%... 9.4 4.6 3.0 07 08 10.8 6.5 3.3 AMMMMMMM %%.. 9.0 3.9 2.7 08 09 9.8 3.9 2.1 AMMMMMMM% %.. 8.2 1.9 1.9 09 10 7.8 1.2 0.0 MMMMMMM%%. . 6.6 0.7 0.0 10 11 5.9 1.2 0.0 MMMMMM%.. 5.1 0.7 0.0 11 12 5.0 1.2 0.0 MMMMM%.. 4.5 0.7 0.0 12 13 4.3 1.2 0.0 MMMM%.. 3.9 0.7 0.0 13 14 4.2 1.2 0.0 MMMM%. 3.9 0.7 0.0 14 15 4.1 1.2 0.0 MMMM%. 3.8 0.7 0.0 15 16 4.1 1.2 0.0 MMMM%. 3.8 0.7 0.0 16 17 4.0 1.2 0.0 MMMM%. 3.7 0.7 0.0 17 18 3.9 1.2 0.0 MMMM%. 3.6 0.7 0.0 18 19 3.9 1.2 0.0 MMMM%. 3.6 0.7 0.0 19 20 3.8 1.2 0.0 MMMM%. 3.5 0.7 0.0 20 21 3.4 1.2 0.0 MMMM.. 3.2 0.7 0.0 21 22 3.7 1.2 0.0 MMMM. 3.4 0.7 0.0 22 23 6.4 2.8 1.6 AMMMM%. 5.4 0.0 1.6 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) 16-May-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000