SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Bunbury Perth Date: 19 March, 2025 T-index: 150 Bearings: 8 188 Distance: 155 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 8.6 3.5 3.0 AFFFFF%. 00 01 9.6 4.0 3.3 BFFFFF% . 01 02 10.0 4.3 3.5 AFFFFF% %. 02 03 10.4 4.5 3.6 AFFFFFF %. 03 04 10.7 4.5 3.7 AFFFFFF %. 04 05 11.0 4.5 3.7 AFFFFFF %%. 05 06 11.2 4.4 3.6 AFFFFFF F%. 06 07 11.3 4.2 3.4 BFFFFFF F%. 07 08 10.9 3.8 3.2 FFFFFFF %.. 08 09 10.5 3.3 2.8 AFFFFFFF %. 09 10 10.1 2.1 1.9 AFFFFFFFF .. 10 11 9.4 0.6 0.0 FFFFFFFFF% . 11 12 8.5 0.6 0.0 FFFFFFFF%. 12 13 7.7 0.6 0.0 FFFFFFF%. 13 14 6.7 0.6 0.0 FFFFFF%.. 14 15 6.0 0.6 0.0 FFFFF%%.. 15 16 5.8 0.6 0.0 FFFFF%.. 16 17 5.5 0.6 0.0 FFFFF%.. 17 18 5.4 0.6 0.0 FFFFF%. 18 19 5.1 0.6 0.0 FFFFF.. 19 20 4.8 0.6 0.0 FFFF%. 20 21 4.7 0.6 0.0 FFFF%. 21 22 5.2 0.6 0.0 FFFFF. 22 23 7.1 2.8 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) 19-Mar-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000