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Very interesting, and amazing technology. But… How is it unjammable? Couldn’t you just generate a big magnetic field?
by tomsto 3y ago
Very interesting, and amazing technology. But… How is it unjammable? Couldn’t you just generate a big magnetic field?
- tantony 3y agoMagnetic field drops off by an inverse-cubed law (as opposed to inverse-squared for RF). So it would be a lot more impractical to cover large volumes.
- tomsto 3y agoThanks. I would still be curious to know how the strength of an artificial magnetic field at a range of say 10 km compares to the order of magnitude of local variations they are talking about in the earth’s magnetic field.
- oldbbsnickname 3y agoMake some assumptions, find the relevant equations, and plug in the numbers. https://en.wikipedia.org/wiki/Magnetic_field https://en.wikipedia.org/wiki/Magnetic_field
- eternityforest 3y agoIIRC I think there was a telephone system with giant magnetic coils that went a quarter mile, but maybe I read a blog wrong or something. In any case it wouldn't be as portable and would make you rather easy to detect I would imagine, if you wanted to cover a large area.
- dendrite9 3y agoThis looks like it might be in a similar vein to the navigation system discussed in a previous post about a new Royal navy test system. There are many good links in the comments https://news.ycombinator.com/item?id=36222625 https://news.ycombinator.com/item?id=36222625
- ncr100 3y agoThey also have made a very large and high tech scraping knife, to remove any jam. /Jk