How to convert the difference in GPS coordinates to meters?

Question

satellite navigation

there are two pairs of coordinates received from GPS, respectively, if one pair is subtracted from the other, then a certain delta will turn out and how to translate this delta into meters to get the distance?

Answer 1

Through the delta - no way, only through the coordinates themselves.
gis-lab.info/qa/great-circles.html

Answer 2

dug up in Wikipedia a hardened formula for calculating the coordinates of points (x, y, z)
also dug up a formula for calculating the distance between two points in space
took the average radius of the earth - profit! :)