SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 30 June, 2025 T-index: 85 Bearings: 15 195 Distance: 196 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F/1E: Near 90 1 5 10 15 20 25 30 35 40 ** NONE ** UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 5.9 2.6 2.1 FFF%. 00 01 7.1 3.4 2.6 AFFFF%. 01 02 7.6 3.9 2.9 AFFFF%.. 02 03 7.8 4.1 3.0 ABFFF%%. 03 04 7.9 4.2 3.1 BFFF%%. 04 05 7.9 4.2 3.0 ABFFF%%. 05 06 8.0 4.0 3.0 ABFFF%%. 06 07 8.0 3.7 2.8 AFFFF%%. . 07 08 7.9 3.2 2.4 BFFFF%%. 08 09 7.2 1.9 1.6 AFFFFF%. 09 10 5.7 0.6 0.0 FFFFF%.. 10 11 4.4 0.6 0.0 FFFF%.. 11 12 3.7 0.6 0.0 FFF%.. 12 13 3.4 0.6 0.0 FFF%. 13 14 3.2 0.6 0.0 FFF.. 14 15 3.1 0.6 0.0 FFF.. 15 16 3.1 0.6 0.0 FFF.. 16 17 3.1 0.6 0.0 FFF.. 17 18 3.1 0.6 0.0 FFF.. 18 19 3.1 0.6 0.0 FFF%. 19 20 3.2 0.6 0.0 FFF%. 20 21 3.0 0.6 0.0 FF%.. 21 22 3.0 0.6 0.0 FF%. 22 23 4.1 0.6 0.0 FFFF. 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) 30-Jun-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000