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You can do GPS by triangulation using existing radio towers with known location. It is very simple.
by 6510 2y ago
You can do GPS by triangulation using existing radio towers with known location. It is very simple.
- ben_w 2y agoG for global. What you've suggested doesn't work at high resolution at sea or in the wilderness due to lack of radio towers at suitable frequencies, atmospheric variations and ducting influencing the signal of the existing systems. Doesn't work in valleys or cities due to multipath reflections. Only works in low rise areas or while flying at high altitude. https://en.wikipedia.org/wiki/Radio_propagation https://en.wikipedia.org/wiki/Radio_propagation That's why the satellites got built in the first place, and why China and the EU added their own satellites to the US and Russian global navigation satellite system.