SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Esperance Perth Date: 2 July, 2026 T-index: 90 Bearings: 289 112 Distance: 602 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 37-41 1E 15 1 5 10 15 20 25 30 35 40 2F 57-61 2E 30 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 7.9 5.8 3.0 XMMMM%%. 6.5 3.5 2.4 00 01 9.2 7.2 3.5 AXMMMMF% .. 7.6 4.4 2.9 01 02 9.7 8.0 3.8 XMMMMM% %.. 8.1 4.9 3.1 02 03 9.9 8.4 4.0 XXMMMM% %.. 8.4 5.1 3.2 03 04 9.9 8.5 4.1 SXMMMM% %.. 8.4 5.2 3.3 04 05 9.9 8.4 4.0 XXMMMM% %.. 8.5 5.1 3.2 05 06 9.8 8.0 3.9 XMMMMM% %.. 8.4 4.9 3.1 06 07 9.8 7.3 3.6 AXMMMMM% %.. 8.4 4.4 2.9 07 08 9.7 6.1 3.1 AMMMMMM% %.. 8.2 3.6 2.5 08 09 8.7 1.4 0.9 MMMMMMMM%% . 7.2 0.0 1.5 09 10 6.7 1.2 0.0 MMMMMM%%. 5.7 0.7 0.0 10 11 5.0 1.2 0.0 MMMMM%.. 4.4 0.7 0.0 11 12 4.3 1.2 0.0 MMMM%.. 3.9 0.7 0.0 12 13 3.9 1.2 0.0 MMMM.. 3.6 0.7 0.0 13 14 3.6 1.2 0.0 MMMM. 3.3 0.7 0.0 14 15 3.6 1.2 0.0 MMMM.. 3.3 0.7 0.0 15 16 3.6 1.2 0.0 MMMM.. 3.3 0.7 0.0 16 17 3.6 1.2 0.0 MMMM.. 3.3 0.7 0.0 17 18 3.5 1.2 0.0 MMMM.. 3.3 0.7 0.0 18 19 3.5 1.2 0.0 MMMM.. 3.3 0.7 0.0 19 20 3.6 1.2 0.0 MMMM.. 3.3 0.7 0.0 20 21 3.4 1.2 0.0 MMMM.. 3.1 0.7 0.0 21 22 3.4 1.2 0.0 MMMM. 3.2 0.7 0.0 22 23 5.3 1.2 0.0 MMMMM%. 4.6 0.7 0.0 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) 2-Jul-2026 BoM Space Weather Services, Sydney Australia +61-2-9213-8000