SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Perth district Date: 22 October, 2024 T-index: 140 Bearings: 0 180 Distance: 0-300 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 60-90 1E 40-90 1 5 10 15 20 25 30 35 40 ** NONE ** UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 8.1 3.1 2.7 AFFFFF%. 00 01 8.5 3.4 3.0 AFFFFF%. 01 02 8.9 3.6 3.1 FFFFF%% . 02 03 9.4 3.8 3.2 FFFFFF% .. 03 04 9.6 3.8 3.3 FFFFFF% %. 04 05 9.8 3.8 3.3 FFFFFF% %. 05 06 9.7 3.7 3.2 FFFFFF% %. 06 07 9.3 3.6 3.1 FFFFFF% .. 07 08 9.1 3.3 2.9 AFFFFFF% . 08 09 8.9 2.9 2.6 AFFFFF%% . 09 10 8.8 2.2 2.1 FFFFFF%. . 10 11 8.3 0.5 0.0 FFFFFFFF%. 11 12 7.9 0.5 0.0 FFFFFFF%.. 12 13 7.2 0.5 0.0 FFFFFFF%. 13 14 6.6 0.5 0.0 FFFFFF%.. 14 15 6.1 0.5 0.0 FFFFFF%.. 15 16 5.8 0.5 0.0 FFFFF%%. 16 17 5.5 0.5 0.0 FFFFF%.. 17 18 5.3 0.5 0.0 FFFFF%. 18 19 5.0 0.5 0.0 FFFF%%. 19 20 4.8 0.5 0.0 FFFF%. 20 21 4.9 0.5 0.0 FFFF%. 21 22 6.0 0.0 1.5 AFFF%%. 22 23 7.3 2.6 2.4 FFFFF%. 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