My ResearchGate Answer 001, to RG Questions:

<< Does the GPS technology require SR and GR for precise computation of time and location? >>

The clear answer to this question is no. Space agencies, at least NASA, do not recommend using calculations for time dilation due to motion such as SR or gravitational potential differences such as GR. Instead NASA sponsored research to ensure corrective measurements for GPS time distortions - which causes by a variety of causes, and so NASA implemented the recommendations of research it sponsored decades ago.

I have my own research that reveals wave equations with classical mechanics that would be suitable for solving time distortion problems with GPS satellites.

Note: I used the term "time distortion" instead of "time dilation", also time dilation equations alone are insufficient when applied for practical purposes and certainly for time correction measurements on GPS satellites.

As an electronics engineer, I can say that employing an electronic signal comparator (which costs only one or two cents here in India) on a GPS satellite, can easily measure the time difference compared to ground conditions and suggest the level of comparator error. As for the automatic correction of time distortion required on GPS satellites, this is not a major problem, or even a common one on Earth.

I don't understand why so many knowledgeable persons are so obsessed with time dilation instead of relying on classical mechanics, when classical mechanics and application of wave equations can be a better option to handle such problems than using inadequate time dilation equations. I completely dismiss the idea of time dilation because time is not something to dilate, unless one invites error into it.