sequential (8)

https://wodewangzhishime.blogspot.com/2021/07/httpswodewangzhishime_4.html

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Ref: https://wodewangzhishime.blogspot.com/2021/11/httpswodewangzhishime_17.html .

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(R1 and R2) 's distance from the radio emittor are same. 5 meters .  . But, R1 receive a weaker signal. Because, R2 is at the angle of 90 degree. . R1 is at the angle of 45 degree. Ok, radio emittor send a signal to (R1 and R2) , and then, wait for them to response. . Which one response faster?? Both of their response speed is same. Because they are same distance from the radio emittor. . It is 5 meters. . . .Ok, (R1 and R0) receive the same weakness of signal. For example, they are also the decibel of 2 . . How do I locate R1 and R0 (physical address)??. Ok, the radio emittor send a signal to R1 and R0. R1 is 5 meters from the radio emittor. . R1's response time is 2 second. . R0 is 10 meters from the radio emittor. R0's response time is 4 second.

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Me: The pysical address of your Iphone is (the Strenghness of the signal and the speed of the echo )

John: Apart from strength and echo, there is one more way to locate your Iphone's physical address. It is parabola. That mean, the physical address of my Iphone is strengh + echo + parabola.

John: Yes.

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