Some useful or insightful data and quick reference tables about amateur radio like:
- The distance of one hop propagation from layer F2
The distance of one hop propagation from layer F2
According to ITU-R P.533-8, assuming this angle will not penetrate layer F
foF2=12.0MHz, foE=3.0MHz, M3000=3.1, R12=100.0
| Angle | 7.0MHz(40m) | 14.0MHz(20m) | 21.0MHz(15m) | 28.0MHz(10m) |
|---|---|---|---|---|
| 0 | 2973 | 3079 | 3354 | 3684 |
| 5 | 2058 | 2167 | 2432 | 2752 |
| 10 | 1476 | 1604 | 1860 | 2172 |
| 15 | 1109 | 1275 | 1534 | 1849 |
| 20 | 873 | 1071 | 1335 | 1631 |
| 25 | 726 | 932 | 1184 | 1344 |
| 30 | 621 | 828 | 1081 | 1122 |
| 35 | 538 | 744 | 910 | 945 |
| 40 | 469 | 674 | 770 | 800 |
| 45 | 408 | 612 | 653 | 678 |
| 50 | 354 | 555 | 551 | 573 |
| 55 | 304 | 484 | 463 | 481 |
| 60 | 257 | 400 | 383 | 398 |
| 65 | 212 | 324 | 310 | 323 |
| 70 | 169 | 254 | 243 | 252 |
| 75 | 126 | 187 | 179 | 186 |
| 80 | 84 | 123 | 118 | 123 |
| 85 | 42 | 61 | 59 | 61 |