Comments by "Bond25" (@Bond2025) on "I Found A Former Secret Government Listening Post" video.

  1. I might have to mention another system you are probably not aware of that was given the project name "CELLDAR". This was tested in the mid 1990s and a Gov Dept using a company name of Roke Manor Research had various test facilities, including a large stately home. The basic idea was to do something with the reflected waves from high frequency transmissions emitted from cellular phone transmitter sites. The reflected waves built up a 3D model that was fairly crude, but showed anything moving within the space monitored as it interrupted it. It looked more like a waterfall display you see today on a SDR. The early tests showed a blob moving, not even the shape of a person, there was no real definition. The aim at first was to use it for passive aircraft RADAR, but it didn't work due to the frequency and downward tilt on directional aerials. Lower frequencies from broadcast and TV stations could never work. It had to be a short wavelength. It improved to a point of being able to detect people and vehicle shapes and worked in built up areas better. The project was stopped as the results could never be improved upon and would never give the definition required.
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  2. Interesting to see the remote monitoring stations covered. This first started in the early 90s when SDRs were on sale but cost thousands. It was only around 1994 that computer controlled ones were being sold to the public and they were being fitted at BT Exchanges in every town and city to form a monitoring network for the RA. The RIS used it to track pirates interfering with police and ambulance etc. The response to any area was in under 1 hour they could pinpoint the exact location and pay a visit. Around 2007 the newspapers run various articles about how week WiFi passwords could cause a problem and how "special monitoring equipment" at BT Buildings could monitor the airwaves and locate people. This was of course a cover for what GCHQ was up to with the various methods of repurposing equipment! They could use a nearby WiFi point to transmit to a device of interest, or monitor for it - or use the remote stations for packet injection attacks. I only know of one case that was used in. GCHQ were using de-authentication attacks and playing about with WiFi. They don't need to do it much now as every bit of data in and out of the UK goes through GCHQ and is stored. So don't think your VPNs are private! As for the SDRs, if you can get in a BT phone exchange, have a look around and you will find them. There is still one in the middle of an exchange in Chester, UK.
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