HF - Propagation Predictions from the United Kingdom

Prepared by - Gwyn Williams, G4FKH

The predictions below are valid for July, 2017


The figures represent approximate S-Points.

The colours represent expected circuit probability, i.e. Black = low to very low probability, Blue = good probability and Red = strong probability.

Band 3.5MHz 7.0MHz 10.1MHz 14.0MHz 18.1MHz 21.0MHz 24.9MHz 28.0MHz
Time
(UTC)
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
*** Europe
Moscow 52.......256 553211113466 355433224566 123554345531 ..112111221. ....1...11.. ............ ............
Time
(UTC)
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
*** Asia
Yakutsk ............ 11.11.111112 211221121122 ............ ............ ............ ............ ............
Tokyo ............ ............ .......111.. ......11.1.. ............ ............ ............ ............
Singapore .........22. ........2321 .......121.1 .......1.... ............ ............ ............ ............
Bangkok .........22. ........3442 .......23432 ......12221. ............ ............ ............ ............
Hyderabad .........233 2.......3444 1......23333 .......21... ............ ............ ............ ............
Tel Aviv 53.......155 552.....3455 25421.124553 ..333312452. ........11.. ............ ............ ............
Dhahran 52......1345 541....13455 2421..124555 ..321123443. ........21.. ............ ............ ............
Time
(UTC)
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
*** Oceania
Wellington ............ ............ ............ ............ ............ ............ ............ ............
Well (NZ) (LP) .1.......... 242......132 331.......43 1.........32 ..........1. ............ ............ ............
Perth .........111 ........2313 ........11.2 ............ ............ ............ ............ ............
Sydney .........1.. ........23.. .......1221. ..........1. ............ ............ ............ ............
Melbourne (LP) ............ .23......... 112........1 ..1........1 ............ ............ ............ ............
Honolulu ............ ............ ............ ............ ............ ............ ............ ............
Honolulu (LP) ............ ............ ............ ........1... ........1... ............ ............ ............
W. Samoa ............ ............ ............ ....1....... ............ ............ ............ ............
Fr. Polynesia ............ .23......... .222........ ...1........ ............ ............ ............ ............
Fr. Poly (LP) ............ ........1... ........21.. ........121. .........1.. ............ ............ ............
Marshall Isles ............ ............ ............ ............ ............ ............ ............ ............
Time
(UTC)
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
*** Africa
Mauritius 1........222 ........2332 .......122.. .......1.... ............ ............ ............ ............
Johannesburg 22.......122 .1......2221 ........31.. .......11... ............ ............ ............ ............
Ibadan 553......345 5542....2455 51531..13555 ..3321124521 ...2....25.. ........12.. ............ ............
Nairobi 33.......233 441.....1344 .42.....3442 ..3.11.134.. .....1..1... ............ ............ ............
Canary Isles 664......156 66531...2466 645432224566 213532225563 ..1332224531 ...22111231. ...11...12.. .........1..
Time
(UTC)
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
*** S. America
Falkland Isles 22.........2 221.......22 .........21. .........1.. ............ ............ ............ ............
Buenos Aires 221......... 433.......23 222.......33 .........122 .........11. ............ ............ ............
Rio de Janeiro 33.........2 442.......34 32.......244 .........332 .........21. .........1.. ............ ............
Lima 222......... 333.......13 2121......23 ..........21 ............ ............ ............ ............
Caracas 332........3 4432......14 21311.....24 .........121 ............ ............ ............ ............
Time
(UTC)
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
000011111220
246802468020
*** N. America
Guatemala 122......... 333........2 212........3 ..........11 ............ ............ ............ ............
New Orleans 232......... 332........1 1..........2 ............ ............ ............ ............ ............
Washington 4431.......1 44321.....12 42..211..123 ..........21 ............ ............ ............ ............
Halifax 4431.......2 44431.....13 21..211.1123 ..........3. ............ ............ ............ ............
Denver ............ 122......... ............ ............ ............ ............ ............ ............
Quebec 3421........ 4432......12 21..11..1122 ..........2. ............ ............ ............ ............
Saskatoon ............ .221......11 .33.11111122 ............ ............ ............ ............ ............
Anchorage ............ ............ ......111... ............ ............ ............ ............ ............
Vancouver ............ ..1......... ..1......... ............ ............ ............ ............ ............
San Francisco ............ 122......... 112......... ............ ............ ............ ............ ............
San Fran (LP) ............ ............ ............ ............ ............ ............ ............ ............
Band 3.5MHz 7.0MHz 10.1MHz 14.0MHz 18.1MHz 21.0MHz 24.9MHz 28.0MHz
30/5/2017, SSN=T-Index

This table has been compiled utilizing the ITURHFProp prediction program engine, this code has been developed from ITU-R P.533 and was coded by Christopher Behm, U.S. Dept. of Commerce, Boulder, Colorado. The program wrapper used was adapted by Gwyn Williams, G4FKH from the old REC533 program by VE5ZX.

Clicking on a path name will produce a BMUF/OPMUF (Basic MUF/Operational MUF) graph, depicting the two best bands for the path.

The table represents median path predictions during quiet geomagnetic conditions and should be used with the following in mind. The monthly, cyclic and seasonal changes throughout any sunspot cycle are different because the sunspot and solar activity is either decreasing or increasing. Sunspot cycles are variable, some are very active whilst others are quiet and of course most are between these extremes.

To assist in the understanding of the table it is best to know where a specific station fits into the scheme of things.

These predictions were prepared for Mr. Average - Radio Amateur, using an average radio with a dipole type aerial, in a quiet urban environment. If a particular set-up is superior to this, it will be necessary to adjust up 2 or 3 s-points and conversely if the set-up is less well off, then drop down 2 or 3 s-points. The percentage probability remains roughly the same. However, it may be that some Amateur's will never hear stations at the times when the numbers are in black.

As just mentioned the prediction engine ITURHFProp has been utilised for the above predictions and is freely available for personal use. Clicking on the ICON below will take you straight to the ITU download page.

The ITURHFProp program as given is a command line program and is quite involved, only those with good PC and propagation knowledge should attempt to utilize it.

ITU download page.

 

Any comments, suggestions, etc. E-Mail: g4fkh@sky.com