SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 1 May, 2025 T-index: 115 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 38-43 1E 15 1 5 10 15 20 25 30 35 40 2F 58-62 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 10.4 6.7 3.5 AXMMMMMF %.. 8.6 4.1 2.8 00 01 11.6 7.9 3.9 XMMMMMM M%%.. 9.8 4.8 3.2 01 02 12.2 8.6 4.2 SXMMMMM MM%%. 10.5 5.2 3.4 02 03 12.5 9.0 4.4 AXMMMMM MM%%. 10.7 5.5 3.5 03 04 12.4 9.1 4.4 AXMMMMM MM%%. 10.7 5.6 3.6 04 05 12.5 9.0 4.4 AXMMMMM MM%%. 10.8 5.5 3.5 05 06 12.4 8.6 4.3 SXMMMMM MM%%. 10.7 5.3 3.4 06 07 12.2 8.0 4.0 XMMMMMM MM%%.. 10.5 4.8 3.2 07 08 11.9 7.0 3.6 AXMMMMMM M%%.. 10.2 4.2 2.9 08 09 11.3 4.8 2.6 MMMMMMMM M%%. 9.6 2.7 2.2 09 10 9.6 1.3 0.0 MMMMMMMMM% %.. 8.2 0.8 0.0 10 11 7.7 1.3 0.0 MMMMMMM%%. 6.7 0.8 0.0 11 12 6.7 1.3 0.0 MMMMMMM.. 5.9 0.8 0.0 12 13 5.8 1.3 0.0 MMMMMM.. 5.2 0.8 0.0 13 14 5.3 1.3 0.0 MMMMM%.. 4.8 0.8 0.0 14 15 5.0 1.3 0.0 MMMMM%. 4.6 0.8 0.0 15 16 4.9 1.3 0.0 MMMMM%. 4.5 0.8 0.0 16 17 4.8 1.3 0.0 MMMMM.. 4.4 0.8 0.0 17 18 4.6 1.3 0.0 MMMMM.. 4.2 0.8 0.0 18 19 4.5 1.3 0.0 MMMMM.. 4.1 0.8 0.0 19 20 4.2 1.3 0.0 MMMMM. 3.9 0.8 0.0 20 21 3.9 1.3 0.0 MMMM%. 3.6 0.8 0.0 21 22 4.4 1.3 0.0 MMMM%. 4.0 0.8 0.0 22 23 7.6 4.2 2.3 AMMMMM%.. 6.4 2.2 2.0 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) 1-May-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000