http://www.sws.bom.gov.au/Category/HF%20Systems/Online%20Tools/Prediction%20Tools/HF/HF.php?CatID=6&SecID=7&SecName=Online%20Tools&SubSecID=1&SubSecName=Prediction%20Tools&LinkName=HF HF Prediction Upper, Recommended, Secondary and Lower HF frequency prediction.ResetPredict Map Circuit Freqs Date + T Help Results ===================================================================== URSL INPUT DATA Date: 13 1 2019 T index: 15 Communications path name: Rio De Janiero Buenos Aires Base 1 location: -34.60, 301.55 Base 2 location: -22.90, 316.75 Number of frequencies: 10 1 3 5 7 10 14 18 21 24 28 ===================================================================== URSL - RECOMMENDED FREQUENCIES FOR HF COMMUNICATIONS FOR CIRCUITS LISTED 13 January, 2019 ================================================================================================================================== **UNITS: FREQUENCY - MHZ, TIME - UT , DISTANCE - KMS R AND S ARE RECOMMENDED AND SECONDARY FREQUENCIES** U AND L ARE UPPER AND LOWER USABLE FREQUENCIES** VERTICAL ANGLE(S) - DEGREES NO SUITABLE FREQUENCY INDICATED BY ZERO** A VALUE PRECEDED BY AN ASTERISK (E.G., "*4") INDICATES A LOW PROBABILITY OF SUCCESS ================================================================================================================================== NAME DISTANCE UT 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Rio De Janiero Buenos Ai 1967 U 14 14 14 14 14 10 10 10 7 10 10 14 14 14 14 18 21 24 24 24 24 21 18 14 14 R 10 10 10 10 10 10 7 7 7 7 10 14 14 14 14 14 14 18 21 21 21 18 14 14 10 1F 9-15 2F 24-32 1E 0 2E 8 S 7 7 7 7 7 7 5 5 5 5 7 10 10 10 10 10 10 14 18 18 18 14 10 10 7 L 1 1 1 1 1 1 1 1 1 5 5 7 7 7 7 7 7 7 7 7 7 5 5 1 1 ================================================================================================================================== Prepared on 13-Jan-2019 by BOM SPACE WEATHER SERVICES, Sydney - PO Box 1386, Haymarket NSW 1240, Australia - Tel:+61-2-9213-8000