[HN Gopher] Peeking underground with giant flying antennas
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       Peeking underground with giant flying antennas
        
       Author : sharpshadow
       Score  : 48 points
       Date   : 2024-05-24 13:50 UTC (9 hours ago)
        
 (HTM) web link (hackaday.com)
 (TXT) w3m dump (hackaday.com)
        
       | OutOfHere wrote:
       | Could this help detect landmines?
        
         | hausen wrote:
         | Yes, if you scale down the antenna/coil (and the aerial
         | vehicle).
         | https://www.smithsonianmag.com/innovation/a-ukrainian-teenag...
        
         | rolph wrote:
         | this particular rig is too lo-res for that. you need a
         | different detector setup, and slower closer flight.
        
           | polishdude20 wrote:
           | I wonder if drones could be used for this then?
        
             | macnetic wrote:
             | A spinout from my university, UMag Solutions is detecting
             | UXO and mines in Ukraine using special drone-mounted
             | magnetometers.
        
       | buildbot wrote:
       | I'm struck between the similarity between this and the big
       | antenna (?) array that the ballon that went over the USA
       | carried...
        
         | lupusreal wrote:
         | That thing flew over/near Malmstrom Air Force Base (ICBM
         | silos.)
        
           | jjwiseman wrote:
           | Using OpenStreetMap data to map stuff the balloon flew near:
           | https://youtu.be/sQ_sEWodIrc?si=LUfvRR4kvlqQyrZ1&t=16
        
             | dylan604 wrote:
             | I had never heard of this MUNDUS tool before, but it looks
             | like a very interesting project.
        
             | 082349872349872 wrote:
             | Imagine using multiple Project Loon balloons as a giant
             | SAR.
        
       | hagbard_c wrote:
       | Something similar was experimented with where I live (western
       | Sweden) to see if the technology is usable to determine the
       | stability of soil layers against land slides. The area around the
       | local river - Gota Alv - is known to be prone to landslides so it
       | was deemed to be a good test subject. A helicopter carrying
       | something which was best described as an enormous chicken run on
       | a long line criss-crossed the area mapping it with what I assume
       | was ground-penetrating radar. The results [1] show our farm to
       | lie on an extremely landslide-prone part of the river valley and
       | I know there have been landslides here in the 60's so there is
       | something to this method. The subsoil consists of silt (the
       | fraction over clay) on top of bedrock, as long as the water
       | content stays below a certain percentage it has quite a high
       | bearing capacity but once it gets over that it easily liquifies.
       | 
       | [1] https://ext-geodatakatalog-
       | forv.lansstyrelsen.se/PlaneringsK...
        
       | Archelaos wrote:
       | Is this used in archeology?
        
         | cebert wrote:
         | Did you read the article? It discusses the archaeological
         | applications.
        
       | foreigner wrote:
       | Can it find tunnels?
        
         | bluGill wrote:
         | Maybe, but can you understand the data you get to realize it is
         | a tunnel?
        
         | m463 wrote:
         | if so, it might be fun to fly over the US-mexican border near
         | tijuana.
        
         | mhb wrote:
         | If not, maybe it could if you pour saltwater into the tunnels.
        
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       (page generated 2024-05-24 23:00 UTC)