BACKGROUND NOISE. “Thus, any magnetic-field-based input to a reasonably precise map would require a very accurate magnetic sensory system and a very accurate sense of gravity. However, even if birds have such a system, daily, partly stochastic, natural variations in the geomagnetic field on the order of 30–100nT in more or less random directions mean that it is very difficult to imagine how a magnetic-field-based map sense could have a precision less than 10–30km (during magnetic storms generated primarily by the Sun, the geomagnetic field variability can reach 1000 nT.”
https://lnkd.in/eUbuD-a
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022