Radio finding (was Irish heaven)

[The Ether Hacker]

I reckon that The Bogeyman came face-to-face with Bogusman, thanks to tracking and triangulation. Once close by, the Bogeyman's task wil have become much easier due to detection of Bogusman's ground wave, and in that scenario there will only be one winner, especially as Bogusman was transmitting from his abode.

From fairly reliable sources, I have heard that Ofcom uses a new method of triangulation which involves multiple remote drones receiving direct-line of sight signal from the unlicensed HF transmitter, and thus gaining precise triangulation of the TX site, sometimes at a distance of 100 or more km, if topography and drone height allow... this basically avoids Ofcom having to hunt for a hf groundwave at a distance of a few miles from the HF transmitter.

So it is now possible for Ofcom to triangulate precisely, within a few meters, the source of HF radiation in the United Kingdom, using remote drones at the appropriate height during calm weather conditions, at very low cost.  This works well under long skip conditions, and badly under NVIS propagation conditions.

[Brian]

I reckon that The Bogeyman came face-to-face with Bogusman, thanks to tracking and triangulation. Once close by, the Bogeyman's task wil have become much easier due to detection of Bogusman's ground wave, and in that scenario there will only be one winner, especially as Bogusman was transmitting from his abode.

From fairly reliable sources, I have heard that Ofcom uses a new method of triangulation which involves multiple remote drones receiving direct-line of sight signal from the unlicensed HF transmitter, and thus gaining precise triangulation of the TX site, sometimes at a distance of 100 or more km, if topography and drone height allow... this basically avoids Ofcom having to hunt for a hf groundwave at a distance of a few miles from the HF transmitter.

So it is now possible for Ofcom to triangulate precisely, within a few meters, the source of HF radiation in the United Kingdom, using remote drones at the appropriate height during calm weather conditions, at very low cost.  This works well under long skip conditions, and badly under NVIS propagation conditions.

I think your "reliable source" is winding you up. 

[Ray Lalleu]

From fairly reliable sources, I have heard that Ofcom uses a new method of triangulation which involves multiple remote drones receiving direct-line of sight signal from the unlicensed HF transmitter, and thus gaining precise triangulation of the TX site, sometimes at a distance of 100 or more km, if topography and drone height allow... this basically avoids Ofcom having to hunt for a hf groundwave at a distance of a few miles from the HF transmitter.

So it is now possible for Ofcom to triangulate precisely, within a few meters, the source of HF radiation in the United Kingdom, using remote drones at the appropriate height during calm weather conditions, at very low cost.  This works well under long skip conditions, and badly under NVIS propagation conditions.

Rather the MI5 with that kind of equipment ?

[The Ether Hacker]

I reckon that The Bogeyman came face-to-face with Bogusman, thanks to tracking and triangulation. Once close by, the Bogeyman's task wil have become much easier due to detection of Bogusman's ground wave, and in that scenario there will only be one winner, especially as Bogusman was transmitting from his abode.

From fairly reliable sources, I have heard that Ofcom uses a new method of triangulation which involves multiple remote drones receiving direct-line of sight signal from the unlicensed HF transmitter, and thus gaining precise triangulation of the TX site, sometimes at a distance of 100 or more km, if topography and drone height allow... this basically avoids Ofcom having to hunt for a hf groundwave at a distance of a few miles from the HF transmitter.

So it is now possible for Ofcom to triangulate precisely, within a few meters, the source of HF radiation in the United Kingdom, using remote drones at the appropriate height during calm weather conditions, at very low cost.  This works well under long skip conditions, and badly under NVIS propagation conditions.

I think your "reliable source" is winding you up. 

Do you think so?  Any reason this would not work?  Direct line of sight triangulation should work at any frequency... right?  The only problem is if refracted hf signals interfere with the direct line of sight signals... hence, long skip conditions are ideal.

I understand this is mostly used for FM pirates and can triangulate any FM signal source around the London area instantaneously using SDR technology etc

[The Ether Hacker]

From fairly reliable sources, I have heard that Ofcom uses a new method of triangulation which involves multiple remote drones receiving direct-line of sight signal from the unlicensed HF transmitter, and thus gaining precise triangulation of the TX site, sometimes at a distance of 100 or more km, if topography and drone height allow... this basically avoids Ofcom having to hunt for a hf groundwave at a distance of a few miles from the HF transmitter.

So it is now possible for Ofcom to triangulate precisely, within a few meters, the source of HF radiation in the United Kingdom, using remote drones at the appropriate height during calm weather conditions, at very low cost.  This works well under long skip conditions, and badly under NVIS propagation conditions.

Rather the MI5 with that kind of equipment ?

Well, I would guess they fit drones with Software Defined Radio (SDR) type software and "compromise" antennas for strong signals only... I am no expert but would think for Government departments such technology in 2019 is relatively inexpensive for them.

I would think this works best for VHF though and within the local area of the TX site.... but HF transmitters are also line of sight before refraction from the ionosphere.... so if you know the rough location and are within 50 miles or so.... logic tells me this would work....
.... as mentioned, it avoids having to hunt local groundwave.... but other triangulation methods are used for long distances such as Time of Arrival methods etc

[Jock Wilson]

What has beeen posted by The Ether Hacker in this thread is informative and sensible.

Thx for that.

[CoolAM Radio]

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