Turn your phone into a space monitoring tool

Re:Turn your phone into a space monitoring tool by JaimeThompson on Thursday March 31, 2022 @08:52AM (#30866604)

The get higher accuracy requires more precise hardware / additional hardware on the receiving end which drastically drives up the cost.

Systems like this [1] which you may have seen being used on construction sites allow much higher accuracy.

[1]https://en.wikipedia.org/wiki/Differential_GPS

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Re:Turn your phone into a space monitoring tool by anfractuosity on Thursday March 31, 2022 @08:59AM (#30866665)

Is it possible to get close to centimetre accuracy without using ground stations like DGPS?

Would you get finer resolution if a GPS receiver also used an atomic clock?

I thought this was interesting - https://www.gps.gov/systems/gps/performance/accuracy/#differ... the difference between military GPS and civilian GPS sounds like it uses 2 frequencies.

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Re:Turn your phone into a space monitoring tool by lallysingh on Thursday March 31, 2022 @09:05AM (#30866711)

Effectively the problem is that the atmosphere (mostly ionosphere) distorts the ranges a bit. Different frequencies distort differently so you can use data from two to compensate.

IIRC, used to work in a gps accuracy firm many many years ago

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