Missing sister - help me find her car?
Discussion
skwdenyer said:
Caddyshack said:
Sorry to read this thread.
I wonder if you might get help if you contacted someone in the Royal Signals, they probably have access to working this sort of stuff out for you?
Thank you. Does anyone know anyone in the Royal Signals? I wonder if you might get help if you contacted someone in the Royal Signals, they probably have access to working this sort of stuff out for you?
They were the prime contractor for Bowman (the Army tactical communication system) and they've also developed 4G LTE mission nodes in the passed. There should be someone who has experience in RF planning that can help (but they have reduced in size drastically in recent times).
https://generaldynamics.uk.com/contact/
skwdenyer said:
Caddyshack said:
Sorry to read this thread.
I wonder if you might get help if you contacted someone in the Royal Signals, they probably have access to working this sort of stuff out for you?
Thank you. Does anyone know anyone in the Royal Signals? I wonder if you might get help if you contacted someone in the Royal Signals, they probably have access to working this sort of stuff out for you?
skwdenyer said:
Thank you all. Still no further forward. Active searching is continuing. We generated a good media push to mark the 28th day since she vanished.
My BIL went back up there this weekend, but weather is very poor, and apparently the bracken is now a full foot taller than it was a month ago - so any terrain searching is now even harder than it was (and of course we're not expecting to find her alive in the undergrowth, obviously).
The only glimmer of useful data came from a combination of a deeper dive into cell tower data and some new (to Police Scotland) equipment. Apparently her phone managed a handshake against a cell tower it shouldn't have been able to see. So the tech team have been out this week trying to figure out where on the ground that might have been possible.
Because we still just need one more piece of data to establish some sort of vector for the relevant period, from which hopefully we can build a platform for obtaining closure.
It sounds like they’ve been out to do a radio frequency propagation survey? Did they say when the handset connected and which network? My BIL went back up there this weekend, but weather is very poor, and apparently the bracken is now a full foot taller than it was a month ago - so any terrain searching is now even harder than it was (and of course we're not expecting to find her alive in the undergrowth, obviously).
The only glimmer of useful data came from a combination of a deeper dive into cell tower data and some new (to Police Scotland) equipment. Apparently her phone managed a handshake against a cell tower it shouldn't have been able to see. So the tech team have been out this week trying to figure out where on the ground that might have been possible.
Because we still just need one more piece of data to establish some sort of vector for the relevant period, from which hopefully we can build a platform for obtaining closure.
Cell mapper is notoriously difficult to use. Do you have or could you PM me the cell id? I may be able to access some historic RF data from previous surveys I’ve done or can acquire.
Fermit said:
I've nothing constructive to add, I can only give you my best wishes, as it's an utterly horrid situation you're in. We're just a few miles away from S.Yorks, if there is anything we can assist with if things were to move this direction at any point.
Thank you. That’s very kind.skwdenyer said:
gotoPzero said:
That to me suggests the location at that time might have been on the top of a hill.
If it was a 2G management message (i.e location update etc) then that could easily happen over considerable distance, even though its spurious.
Due to the terrain around that area you could end up in a situation where you are in fringe coverage of what ever sites the mobile could see then you come over a hill and suddenly it can see a BTS 20km+ away and says - HELLO!
This might have only been for a moment, but I think that points towards being well elevated.
Back in the day when I was involved in RF design for mobile networks we could often see this sort of activity from our drive testing in rural areas.
You can also sometimes get this because of the beam pattern used can sometimes include some pretty serious side lobes which if you are in the right spot you might get coverage from an unexpected cell.
HTH.
Yes, my thoughts too. Given that her car was next to a large body of water, a cell ping from an elevated position would be a very important finding. We've only discovered this new information in the last few days, so I'm spending time today working on constructing a GIS model of terrain and cell towers to try to aid activities.If it was a 2G management message (i.e location update etc) then that could easily happen over considerable distance, even though its spurious.
Due to the terrain around that area you could end up in a situation where you are in fringe coverage of what ever sites the mobile could see then you come over a hill and suddenly it can see a BTS 20km+ away and says - HELLO!
This might have only been for a moment, but I think that points towards being well elevated.
Back in the day when I was involved in RF design for mobile networks we could often see this sort of activity from our drive testing in rural areas.
You can also sometimes get this because of the beam pattern used can sometimes include some pretty serious side lobes which if you are in the right spot you might get coverage from an unexpected cell.
HTH.
Does anyone have any useful experience to add there? I've got a hold of QGIS and the OS Terrain 50 dataset for a start, but I'm struggling to get reliable data out of Cellmapper - which seems a *very* strangely-designed tool.
sebdangerfield said:
It sounds like they’ve been out to do a radio frequency propagation survey? Did they say when the handset connected and which network?
Cell mapper is notoriously difficult to use. Do you have or could you PM me the cell id? I may be able to access some historic RF data from previous surveys I’ve done or can acquire.
Thanks. I’ll PM you later on.Cell mapper is notoriously difficult to use. Do you have or could you PM me the cell id? I may be able to access some historic RF data from previous surveys I’ve done or can acquire.
skwdenyer said:
Yes, my thoughts too. Given that her car was next to a large body of water, a cell ping from an elevated position would be a very important finding. We've only discovered this new information in the last few days, so I'm spending time today working on constructing a GIS model of terrain and cell towers to try to aid activities.
Does anyone have any useful experience to add there? I've got a hold of QGIS and the OS Terrain 50 dataset for a start, but I'm struggling to get reliable data out of Cellmapper - which seems a *very* strangely-designed tool.
PM'ed.Does anyone have any useful experience to add there? I've got a hold of QGIS and the OS Terrain 50 dataset for a start, but I'm struggling to get reliable data out of Cellmapper - which seems a *very* strangely-designed tool.
skwdenyer said:
Yes, thanks. Just out dealing with a different family emergency (sat in A&E waiting room right now). I’ll reply tomorrow when I’m back in front of actual information.
urgh, sorry to hear this too. when it rains, it pours. I've sent a message to a sigs officer I know from a few years back, I'll let you know if there is anything he might be able to offer.
I've just see the latest appeal online, hopefully this will help. Still thinking of you and your family.
https://cumbriacrack.com/2023/07/25/search-continu...
https://cumbriacrack.com/2023/07/25/search-continu...
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