God cannot decide
"...the high-precision required of the GPS system requires nanosecond accuracy..."
"If these effects were not properly taken into account, a navigational fix based on the GPS constellation would be false after only 2 minutes, and errors in global positions would continue to accumulate at a rate of about 10 kilometers each day! The whole system would be utterly worthless for navigation in a very short time.”
Hmm. This seems quite odd to me. The British during the early years of the second world war using quite obsolete radar technology were able to get a very accurate position on their bombers flying over Germany on night raids without using the clocks on the bombers. The only clocks that were needed were the clocks at the ground stations back in England. That was over 75 years ago. Today. much of the world is not covered by GPS, due to a lack of ground stations. This GPS clock claim is repeated over and over by thousands of people, but original sources are very few. There are as far as I can tell about an equal number of people in the field who challenge this claim, but rarely ever referenced. I wonder if popularity gets in the way of actual information transmission. Technologically speaking, there is no reason that necessitates a clock on any GPS satellite.