600 kHz wide mode

HB9TMC · June 7

I'm currently seeing this weak signal on multiple kiwis, from about 16.1 to 16.7 MHz. Pulses with a repetition rate of about 250 ms.

There is some aliasing pattern on the waterfall, but they seem to sparse occupied frequencies.

I have no time for TDoA unfortunately as I have to leave

G8JNJ · June 7

They are Wave Radars, and sweep across the frequency range at a rate of approx 4Hz (250mS).

The ones you are hearing are most likely located at the Hook of Holland and Dyfamed in France, but there are likely to be other sources as it is a common frequency.

My KiWi's have most of the European ones marked with DX tags.

http://wessex.zapto.org:8073

http://websdr.uk:8060

Regards,

Martin

HB9TMC · June 7

Learned something new.

Thank you Martin.

G8JNJ · June 7

A bit more information for those interested in Wave Radars, cut an pasted links from discussions on other sites.

CODAR and WERA (now Helzel) are very similar systems, and I think that folks tend to call all of them CODAR, a bit like some brand names becoming used for all products of a certain type regardless of the actual manufacturer.

There are plenty of WERA systems operating, but maybe not in the USA, even so the chances are you will have heard one, but thought it was CODAR.

https://helzel.com/

List of USA radars including manufacturer.

https://hfrnet.ucsd.edu/sitediag/stationList.php

You can also use this map.

https://cordc.ucsd.edu/projects/hfrnet/

Select station placemarks in the overlay menu to show them on the map.

If you click on each map pin it will give you more data, including the operating frequency.

Alternatively, there is this list, but it takes a very long time to load.

https://hfrnet.ucsd.edu/sitediag/stationList.php

WERA have a range of products, some of which have slightly different characteristics.

The European ones are listed in a table at the end of this document