SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Busselton Perth Date: 22 October, 2024 T-index: 140 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 8.1 4.0 3.2 BFFFF%. 00 01 8.6 4.5 3.5 AFFFF%. . 01 02 9.0 4.7 3.7 AFFFF%% . 02 03 9.5 4.9 3.8 AFFFFF% .. 03 04 9.8 5.0 3.8 ABFFFF% %. 04 05 9.9 5.0 3.8 ABFFFF% %. 05 06 9.8 4.8 3.7 AFFFFF% %. 06 07 9.4 4.6 3.6 AFFFFF% .. 07 08 9.2 4.3 3.4 BFFFFF% . 08 09 9.0 3.8 3.0 AFFFFF%% . 09 10 8.9 3.0 2.5 AFFFFF%% . 10 11 8.5 0.7 0.0 FFFFFFFF%. 11 12 8.0 0.7 0.0 FFFFFFF%.. 12 13 7.3 0.7 0.0 FFFFFFF%. 13 14 6.6 0.7 0.0 FFFFFF%.. 14 15 6.1 0.7 0.0 FFFFFF%.. 15 16 5.8 0.7 0.0 FFFFF%%. 16 17 5.5 0.7 0.0 FFFFF%.. 17 18 5.3 0.7 0.0 FFFFF%. 18 19 5.0 0.7 0.0 FFFF%%. 19 20 4.8 0.7 0.0 FFFF%. 20 21 4.9 0.7 0.0 FFFF%. 21 22 6.0 1.9 1.7 AFFF%%. 22 23 7.3 3.4 2.7 AFFFF%. 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