Here's an interesting article[1] about how relativity affects GPS satellites. The clock ticks in a GPS satellite need to be accurate to within 20-30 nanoseconds for accuracy, and they tick 38 microseconds/day faster to account for relativity.
GPS is one of the few technologies that have to account for both Special Relativity and General Relativity. The level of engineering that went into the system is just amazing.
Fun fact, GPS satellites use rubidium clocks instead of cesium clocks, and only maintain their accuracy thanks to yet another incredible feat of engineering.
Fun fact, GPS satellites use rubidium clocks instead of cesium clocks, and only maintain their accuracy thanks to yet another incredible feat of engineering.