Pat, the military declasified the accuracy side of GPS in 2000, and I myself have used the new gps systems, surveying, to the accuracy of 10'ths of an inch. So, I'd say the information you stated is considerably outdated, from the days of accuracy classification, as I also flew in those days, of no more than 6ft to 20ft inaccuracy, and it certainly coundn't be used, pre-2000, for surveying, without ground accurizers, which we also used, as far back as 1993, on the Boston Big Dig Tunnel project. We actually had on board computerized positioning, with ground corrected accuracy, to 10ths of an inch, even in 1993. The military released the secrecy codes for large government projects. We are now fast approaching the ability to do just what you stated___landing jets pilotless on carriers, and conducting air-combat pilotless. In fact the military is presently working on this generation of flight... Going to be a foolishly interesting future of wars... Time will tell...
Lloyd
Quote:
Originally Posted by Profpat  Lloyd;
I read the 2 links you posted and I understood them.
Thank you.
So if your point is that man can make some very impressive measurements, I'm impressed.
The fact that we can split a second into over 9 billion cycles, and the fact that they are kept in a vacuum which is 10 trillionths of an atmosphere, are very accurate.
As impressive as that is, I watched a TV program that said, with the cesium clock and GPS they still don't have the accuracy to land a jet on an aircraft carrier pilotless.
I guess they are within 60' but you have to be within 20' to land one of those babies.
And that takes man, even more impressive, then the measurements, he came up with.
It will be nice, I guess, when we can send out the arms, without the troops.
Best to all,
Pat |