SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Perth district Date: 31 August, 2024 T-index: 155 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 9.1 2.7 2.5 AFFFFFF% . 00 01 10.0 3.2 2.8 AFFFFFF% %. 01 02 10.7 3.5 3.0 AFFFFFFF %. 02 03 11.1 3.6 3.1 FFFFFFF F%. 03 04 11.1 3.7 3.2 FFFFFFF F%. 04 05 11.1 3.7 3.2 FFFFFFF F% 05 06 10.9 3.6 3.1 FFFFFFF %. 06 07 10.7 3.4 2.9 AFFFFFFF %. 07 08 10.6 3.0 2.7 AFFFFFFF %. 08 09 10.3 2.4 2.3 FFFFFFFF %. 09 10 9.6 0.5 0.0 FFFFFFFFF% . 10 11 8.6 0.5 0.0 FFFFFFFF%. 11 12 7.4 0.5 0.0 FFFFFFF. 12 13 6.7 0.5 0.0 FFFFFF% 13 14 5.9 0.5 0.0 FFFFF%. 14 15 5.3 0.5 0.0 FFFFF%. 15 16 5.0 0.5 0.0 FFFF%.. 16 17 4.8 0.5 0.0 FFFF%.. 17 18 4.5 0.5 0.0 FFFF%. 18 19 4.2 0.5 0.0 FFFF%. 19 20 4.0 0.5 0.0 FFF%. 20 21 3.9 0.5 0.0 FFF%. 21 22 4.4 0.5 0.0 FFFF%. 22 23 7.0 1.8 1.8 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) 31-Aug-2024 BoM Space Weather Services, Sydney Australia +61-2-9213-8000