HF Band Openings

HF band openings can be tracked in different ways. Weak Signal Propagation Reports (WSPR) provide a useful way of tracking band openings.

The table below contains links that chart HF band openings – based on analysis of weak signals transmitted by amateur radio stations. We will continue to add more bands and more reporters. Keep watching this space.

Updated 2021-01-24


(m)AFOCSANAASEU
160EA8
VK3
VK4
ZL2
VK7
KD2
WV5
KK6
VE3
BD7
BA7
DK8
G8D
80EA8VK2
VK3
PY1WA2
WA5
KK6
VE4
7L4
BD7
DK8
ON5
40ZS1
ZS3
ZS6
VK2
VK4
VK5
VK6
VK7
PY1
PT2
PY2
KD2
KD6
VE6
JA
BD7
JA8
DL0
G7R
HB9
IW2
LX1
30EA8VK3
VK4
ZL2
PT2
PY2
KK6
N2H
WB5
BA4
JH3
DK8
G8N
IW2
20ZS3
ZS6
ZS6


VK2
VK3
VK4
VK5
VK6
ZL2
LU3
PT2
PY2
PY1

KD6
N2H
VE3
BA7
VR2
JH3

DK8
G8N
IW2
ON5
17ZS6ZL2PY1N2H
K4C
KK6
BD7ON5
DL0
G8N
HB9
15ZS0VK3
ZL2
PT2WA2
KK6
N6
BA7
BD7
DK8
G8D
LX1
12EA8W8ABD7G8L
10EA8VK2
VK5
VK7
PY1WA2
K3
WA6
HL3
BD7
DL0
G8L
LA3
Track HF band openings to and from all continents

HF band openings from Germany to Australia

As an example, the chart below tracks 40m HF band openings for radio communication from Germany to Queensland Australia.

HF band openings are pictured as weak signal spots from DF2UU to VK4CT during period of 7 days to 2021-Jan-19
40m band openings from Germany to Queensland Australia

Description

Each dot on the chart above represents a weak signal transmitted by DF2UU in Germany and received by VK4CT near Brisbane Australia.

In this case, spots grouped on the left-side represent signals received on the long-path bearing 246 degrees from Germany to Brisbane. Spots grouped on the right-side represent signals received along the short-path bearing 64 degrees from Germany to Brisbane. Signal strengths correlate with the sun’s solar activity. The strongest signals generally occur during dawn and dusk along the grey line.

The sample chart shows that during seven days ended 2021-Jan-19, the 40m band opened for 1.5 hours on the long-path and six hours on the short-path.

The chart demonstrates that signal to noise ratios vary by about 17dB on the short-path and about 20 dB on the long-path.

Applications

The charts are useful for a variety of applications – including: contest planning and station comparisons.

Contest planning

A plan is essential for competitive performance. Knowing the best band opening times helps to prepare for opportunities when they arise. The alternative is to miss narrow windows to valuable openings. The charts show the best times to work any continent on any HF band.

A plan can be easily mapped on a one page spreadsheet. That sheet is enough to guide the operation. Label each row with the UTC hour down the left column. Label each column with bands along the top row.

Mark cells with band openings using continent abbreviations – AF, OC, SA, NA, AS and EU.

For further refinement add colour highlights to your high priority cells.

Station comparisons

Select two reporters that you would like to compare – typically on the same band and located close by. Then open two browser windows side-by-side on the same screen. Use the first browser to open charts for the first reporter’s callsign, and use the second browser to open charts for the second reporter’s callsign. Scroll through the charts to compare spots received and reported by the stations being compared.

There is no limit to the number of browser windows open at the same time. This is useful for comparing more than two stations.

Have fun

We hope you enjoy an educational journey while browsing through the charts. You might like to test your knowledge of radio wave propagation by doing the exercises at bottom of each set of charts. Chances are that you will find your own call-sign in the charts 😉

Enjoy!