SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 16 May, 2025 T-index: 90 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 6.9 2.9 2.3 FFFF%.. 00 01 8.2 3.6 2.7 AFFFFF%. . 01 02 8.9 4.0 3.0 ABFFFF%% . 02 03 9.2 4.2 3.1 BFFFFF% .. 03 04 9.0 4.3 3.2 BFFFF%% . 04 05 9.0 4.3 3.2 BFFFF%% . 05 06 9.1 4.2 3.1 BFFFFF% .. 06 07 9.2 3.9 2.9 AFFFFFF% .. 07 08 8.9 3.4 2.6 AFFFFF%% .. 08 09 8.3 2.4 1.9 AFFFFFF%. . 09 10 6.8 0.6 0.0 FFFFFF%%. 10 11 5.3 0.6 0.0 FFFFF%.. 11 12 4.4 0.6 0.0 FFFF%.. 12 13 3.8 0.6 0.0 FFF%.. 13 14 3.7 0.6 0.0 FFF%. 14 15 3.6 0.6 0.0 FFF%. 15 16 3.6 0.6 0.0 FFF%. 16 17 3.6 0.6 0.0 FFF%. 17 18 3.4 0.6 0.0 FFF%. 18 19 3.4 0.6 0.0 FFF%. 19 20 3.3 0.6 0.0 FFF%. 20 21 3.1 0.6 0.0 FFF.. 21 22 3.2 0.6 0.0 FFF. 22 23 4.9 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) 16-May-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000