access and visualize more than 5 Billion records in the WSPR Database

Data Analytics/Comparison

Thank to this excellent web page https://wspr.hb9vqq.ch/ that collects all #wspr spots in which you can set several wieving parameters, I could notice that my EX0DX beacon was a poor performer since 3.3.23 and that yesterday’s troubleshooting brought positive results.

I am copying here the Help page .

This website allows you to access and visualize more than 5 Billion records in the WSPR Database, reaching back to 2008! WSPR is a perfect tool for long-term Propagation analytics, but also convenient for a quick check of YOUR HF Propagation conditions.

At any given time, day and night, there are more than 800 active WSPR Transmitters and Receivers worldwide. WSPR is the only Digi mode that contains the used Power level in the transmitted Data. WSPR is not a QSO Mode, it is a Weak Signal Propagation Reporter.

Time Period
Time periods can be entered as absolute or relative Time

TX and RX fields can be

A callsign like
IU2PJI, or a Prefix (min. 2 characters) like IU2P% or IU%
You can use multiple full callsigns OR multiple partial callsigns. Examples:

A locator like
JN47kh, or JN47% or JN%
You can use multiple full six-character locators OR multiple partial locators. Examples:

A CQ Zone (1-40)
CQ Zone mapping is derived from https://zone-check.eu. I fear it is not complete, and it might be missing some calls in some CQ Zones.

There are more filtering possibilities like Band, Power, SNR and Distance, they should be self-explanatory. Give it a try.

Spot Limit
The default Spot Limit is 5000. If your search hits the Limit the “Spot number” will turn red. Adjust your Filter settings or increase the max. Spot count.

Save searches and Link sharing
You can save your searches and give them a name to restore them later. Also, you can click on the Link Icon in the upper right corner to share your search with others. You can share a Link either with an absolute (Abs) time range or a relative (Rel) time period.

Data Aggregation
For a summarized presentation of the WSPR Spots, depending on the chosen time period, you can select one of the available aggregations, minutes, hours, or days. Choose your aggregation wisely, not everything makes a whole lot of sense.

Show/hide Bands on Graph
You can hide/show individual Bands on the graph by clicking on the Band legend at the Top of the graph.

What can I get out of it?

This webpage can help to answer questions like:

  • What is the best Band and Time to contact X from Y?
  • What is the Propagation trend over a period of time T?
  • How local is Propagation?
  • What’s the impact of major Solar events to Propagation?

Here is an example:

What is the Best Band and Time to work South Africa from CQ Zone 14? Demo Video

Period: 3 days
TX locators: JG%,KG%,JF%,KF%
RX Zone: 14

This website will probably never be finished and will always have its rough edges. Nevertheless, I hope some of you will find it useful. There will be more features implemented over time in future releases, stay tuned.

Also, check the outstanding WSPR Dashboards at wspr.live

Roland HB9VQQ

TNX HB9VQQ for your work

#ex0dx #wspr


EX0DX WSPR Beacon 10m to 80m

EX0DX part of the Intl. WSPR Project

14 AUGUST 2021

Announcing the 24h/7 operation of the EX0DX WSPR HF beacon as Station member of the International WSPR Project started, managed HB9VQQ who provides free of charge hardware to strategic location.

The transmitter consist in a 200mW Zachtek WSPR Desktop Transmitter connected to an End Fed antenna covering the 10-15-20-40-80m bands from the WWLocator MN72GU

EX0DX part of the Int

Establishing the largest HF Beacon Network

New Offer for direct QSL to Kyrgyzstan, EX DXCC prefix – (time limited)

Direct QSL cards to Kyrgyzstan (EX)

I herewith offer to manage your direct QSL cards to EX8M, EX8MAT, EX9T , EX8MLE and EX8MLT if they arrive to my address in Switzerland before January 13th 2017

Please include:
From EUROPE : SASE +1 IRC or 2 USD
From the rest of the word: SASE +1 IRC or 3 USD

My address is on QRZ.com/db/hb9dur or use the D4C direct mailing address.

I hope this may help some of you to get some QSO confirmed.

73 es Season’s greeting
Andrea, HB9DUR

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