Jun. 20 - 30, 2025

VP9/JL8AQH

Summer Solstice Skew Path to Japan on 10MHz

Location: Hamilton Parish

Antenna

Vertical beam for 10-28 MHz

& DP for 7 MHz

Looking over the North Atlantic

No need of antenna tuner

Propagation

1.8 MHz: 10

3.5 MHz: 35

7MHz: 251

10 MHz: 411

14 MHz: 1016

18 MHz: 765

21 MHz: 182

24 MHz: 14

28 MHz: 0

Total: 2684

Summer Solstice Propagation from Bermuda Islands to Japan

08Z-10Z 10 MHz

Skew path

JA stations beam to 140-150 degree (ZL direction),

taking southern route (ionosphere) to avoid the polar region.

10Z-11Z 14 MHz

Short path

0930-1030Z shows strong one-way path characteristics

11Z-12Z 18 MHz

Sporadic short path

K < 2, A <11, and probably needs Es occurrence.

12Z-14Z 21MHz

Sporadic short path. FOT matters.

21Z-23Z 14/18 MHz

Short path

K < 2, A <11

QSL card

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