Which begs the question: just where the heck, exactly, is the center of the Earth given that it is in the 'middle' of a molten and dynamic core. Are the satellite orbits so stable and/or measurable around the center of gravitational pull that the location can be determined from that? Where is the reference point? Is Archimedes fulcrum for moving the planet nearby?
This would seem to play into the accuracy of the location of the GPS satellites at any given time-hack. Tom Holmes, N8ZM -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Chris Albertson Sent: Wednesday, May 28, 2014 12:22 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change > On 5/27/14, 10:24 AM, Brooke Clarke wrote: >> This is one of the problems I have with the claim that sea level is >> rising at 2mm per year. i.e. how well can they back out the plate >> movement in historical tide gauge records? Let's assume they are NOT good at this and are working with factor of two error. All you need to know to see there is a problem is the order of magnitude of the trend. It's like if someone says "the house is on fire. We have to get out" and then you argue no it's not because you've got the rate of combustion off by a factor of 2.73. Small factors don't change the practical result. 2mm/yr is a small and very conservative estimate. A better one that reflects current conditions is nearly 4mm/yr. But the worry is that the rate is not constant and there is some positive feedback. That seems to be the case but it will take 20 years to really know for sure. BACK ON TOPIC... What does it take to measure ones distance from the center of the Earth accurately enough to detect geological movement in a reasonable amount of time? Measuring distance really is, I think a time nut problem as I bet it involves measuring radio waves. -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
