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Old January 14th 13, 12:27 AM posted to sci.physics.relativity,sci.physics,alt.astronomy,sci.astro,sci.math
Sam Wormley[_2_]
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Default special relativity's second postulate is invalid

On 1/13/13 4:36 PM, Koobee Wublee wrote:
Let’s enjoy the following play between Tom and a GPS satellite.
Hopefully, the self-styled physicists would begin to understand why GR
is not necessary in designing the GPS.


Koobee, Work through this resource for an understanding of why
relativity is necessary for GPS to work.

Reminder: Relativity in the Global Positioning System
http://relativity.livingreviews.org/...es/lrr-2003-1/


Article Abstract

The Global Positioning System (GPS) uses accurate, stable atomic
clocks in satellites and on the ground to provide world-wide position
and time determination. These clocks have gravitational and motional
frequency shifts which are so large that, without carefully accounting
for numerous relativistic effects, the system would not work. This
paper discusses the conceptual basis, founded on special and general
relativity, for navigation using GPS. Relativistic principles and
effects which must be considered include the constancy of the speed of
light, the equivalence principle, the Sagnac effect, time dilation,
gravitational frequency shifts, and relativity of synchronization.
Experimental tests of relativity obtained with a GPS receiver aboard
the TOPEX/POSEIDON satellite will be discussed. Recently frequency
jumps arising from satellite orbit adjustments have been identified as
relativistic effects. These will be explained and some interesting
applications of GPS will be discussed.


See:

http://relativity.livingreviews.org/...003-1Color.pdf