SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Albany Perth Date: 27 July, 2024 T-index: 130 Bearings: 331 152 Distance: 386 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 51-56 1E 24 1 5 10 15 20 25 30 35 40 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 8.0 4.5 2.7 ABFFF%.. 00 01 9.5 5.5 3.2 BBFFFF% .. 01 02 10.3 6.1 3.5 ABBFFFF %. 02 03 10.6 6.4 3.6 ABBFFFF %. 03 04 10.6 6.6 3.7 ABBFFFF %. 04 05 10.7 6.5 3.7 ABBFFFF %. 05 06 10.5 6.3 3.6 ABBFFFF %. 06 07 10.4 5.8 3.3 BBFFFFF %.. 07 08 10.2 5.0 3.0 ABBFFFFF %. 08 09 9.3 3.3 2.1 BFFFFFF% . 09 10 8.0 1.0 0.0 BFFFFFF%%. 10 11 6.6 1.0 0.0 BFFFFF%. 11 12 5.4 1.0 0.0 BFFFF%. 12 13 4.7 1.0 0.0 BFFF%. 13 14 4.1 1.0 0.0 BFFF. 14 15 4.0 1.0 0.0 BFF%. 15 16 3.9 1.0 0.0 BFF%. 16 17 3.8 1.0 0.0 BFF%. 17 18 3.6 1.0 0.0 BFF%. 18 19 3.3 1.0 0.0 BFF%. 19 20 3.3 1.0 0.0 BFF%. 20 21 3.2 1.0 0.0 BFF%. 21 22 3.4 1.0 0.0 BFF%. 22 23 5.6 1.0 0.0 BFFFF%. 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) 27-Jul-2024 BoM Space Weather Services, Sydney Australia +61-2-9213-8000