SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kalgoorlie Perth Date: 22 October, 2024 T-index: 140 Bearings: 254 77 Distance: 548 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 42-54 1E 17 1 5 10 15 20 25 30 35 40 2F 61-70 2E 32 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 9.6 7.7 4.0 XMMMMM% .. 8.5 4.4 3.4 00 01 10.0 8.4 4.4 AMMMMMM %. 8.9 4.8 3.6 01 02 10.4 8.9 4.6 AXMMMMM %.. 9.3 5.1 3.8 02 03 10.9 9.2 4.7 AXMMMMM M%.. 9.8 5.3 3.9 03 04 11.1 9.3 4.7 AXMMMMM M%.. 10.0 5.4 3.9 04 05 11.3 9.2 4.7 AXMMMMM M%%. 10.2 5.3 3.9 05 06 11.2 9.0 4.6 AXMMMMM M%.. 10.1 5.2 3.8 06 07 10.7 8.5 4.4 AMMMMMM M%. 9.6 4.9 3.7 07 08 10.5 7.8 4.1 SMMMMMM %%. 9.4 4.5 3.4 08 09 10.3 6.8 3.7 MMMMMMM %.. 9.2 3.9 3.1 09 10 10.1 4.9 2.8 MMMMMMMM %.. 9.0 2.7 2.4 10 11 9.5 1.3 0.0 MMMMMMMMM% .. 8.5 0.7 0.0 11 12 8.9 1.3 0.0 MMMMMMMMM% . 8.0 0.7 0.0 12 13 8.3 1.3 0.0 MMMMMMMM%. 7.5 0.7 0.0 13 14 7.5 1.3 0.0 MMMMMMMM.. 6.8 0.7 0.0 14 15 7.0 1.3 0.0 MMMMMMM%.. 6.4 0.7 0.0 15 16 6.6 1.3 0.0 MMMMMMM%.. 6.0 0.7 0.0 16 17 6.3 1.3 0.0 MMMMMMM.. 5.8 0.7 0.0 17 18 6.0 1.3 0.0 MMMMMM%. 5.5 0.7 0.0 18 19 5.6 1.3 0.0 MMMMMM. 5.2 0.7 0.0 19 20 5.4 1.3 0.0 MMMMMM. 5.0 0.7 0.0 20 21 5.6 1.3 0.0 MMMMMM.. 5.1 0.7 0.0 21 22 7.3 4.4 2.5 MMMMM%. 6.4 2.3 2.2 22 23 8.7 6.6 3.5 AMMMMM%. . 7.6 3.7 3.0 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) 22-Oct-2024 BoM Space Weather Services, Sydney Australia +61-2-9213-8000