Re: Simple experiments that conclusively disprove General Relativity


"Sam Wormley" <swormley1@xxxxxxxxx> wrote in message news:PVMnl.525538$TT4.379464@xxxxxxxxxxxx
Sam Wormley wrote:
Tom Potter wrote:
"Sam Wormley" <swormley1@xxxxxxxxx> wrote in message
news:x_znl.580163$yE1.436823@xxxxxxxxxxxx
Tom Potter wrote: [snipped]

PD noted that Potter says that he could have built the GPS system
without using those GTR principles, simply by making an ad-hoc
correction
to the GPS clocks.

However, based on Potter's posting record, Potter doesn't even
understand
direct sequence spread spectrum modulation, let alone the mathematics
or engineering behind a correlation receiver as is used in GPS
receivers.

Potter reminds me of Willy Loman (Death Of A Salesman)... no
education,
blustering and frothing at the mouth with no substance of any value to
anybody.

As can be seen by his posting of the same old references written by a
couple of guys on the public dole,
and by his attacking messengers, rather than addressing messages in a
rational, intelligent, moral way,

and by his obvious ignorance of the GPS System, and his distortion of
my posts as demonstrated in his statement::
"Potter says that he could have built the GPS system
without using those GTR principles, simply by making an ad-hoc
correction to the GPS clocks."

As can be seen, Sammy is implying that the GPS "clocks" are corrected,
when the fact of the matter is that the clocks are left pretty much
alone, and GPS users are advised of each satellite's clock difference
from the master system clock,

Potter is grossly confused here. GPS receivers are advised
of the number of leap seconds introduced since GPS came online.
But the clocks are offset (as determine by relativity) so
that from the perspective of the ground user, they are in
sync with ground based clocks.

As can be seen Sam Wormley confuses clocks with oscillators,
and seems to think that the GPS ground control
continually controls the oscillators and clocks on the GPS satellites.

I suggest that Sammy do a little research on why
af0, af1 and "Time of Applicability" data
are transmitted to GPS receivers.

Note that af0 has the dimension of seconds,
and that af1 has the dimension of seconds per seconds.

The af0 (Seconds) data tells GPS receivers how much
the clock on a particular satellite
differs from the master system time,

and af1 data (Seconds per second) tells GPS receivers how much
the oscillator on a particular satellite
is drifting with respect to the master system oscillator.

Note that a GPS receiver receives the master system time
from all satellites, and the af0 adjustment for each satellite

and the receiver uses the af0 data
to adjust the time of each satellite clock
to agree with the master system clock,

and it uses the af1 data to correct for any drift
between the master oscillator and the oscillators
in each satellite.

Note that the "Time of Applicability"
indicates at what time the af0 data was applied,
and GPS receivers can compute how much
the clock in each satellite has drifted
between the "Time of Applicability" and the current time
by using the af1 data.

Here's how it works.
Ground stations monitor each satellite's clock
over an extended period of time,
and periodically tells each satellite how much their clock
differs from the master clock,

the ground stations also compute how much each
oscillator is drifting with respect to the master oscillator,
and transmits this data to each satellite ,

and each satellite stores this data in its' memory,
and transmits the data with its' almanac message.

Some typical almanac data can be seen at:
http://gpsinformation.net/main/almanac0.htm

--
Tom Potter
http://tdp1001.spaces.live.com/
http://www.tompotter.us/misc.html
http://www.geocities.com/tdp1001/index.html
http://notsocrazyideas.blogspot.com
http://www.flickr.com/photos/tom-potter/
http://tdp1001.wiki.zoho.com
http://groups.msn.com/PotterPhotos
http://www.androcles01.pwp.blueyonder.co.uk/dingleberry.htm




.

Relevant Pages

  • Re: NEW GPS with the best sensitivity of antenna!!!
    ... > I have head that under tree cover after rain GPS doesn't work. ... the geometry of the satellites being used with respect to receiver ... diffraction, ans scattering of the satellite signal by trees, utility ... Satellite clock--Errors in the transmitted clock, ...
    (sci.geo.satellite-nav)
  • GPS Satellite Info as of 24 Feb 2009 and 20 Mar 2009
    ... The following satellite information is provided by the National Geospatial-Intelligence ... This information is supplied for all who have an interest in GPS. ... GPS PRECISE EPHEMERIDES, SATELLITE CLOCK PARAMETERS ... National Geospatial-Intelligence Agency and Air Force monitor station data ...
    (sci.geo.satellite-nav)
  • Re: Evidences for the ether
    ... clock being ... |> | to go from the satellite to the receiver. ... |> | this means that Androcles doesn't know how the GPS works. ...
    (sci.physics.relativity)
  • Re: The Speed of Gravity =?windows-1252?Q?=96_What_the_Exp?= =?windows-1252?Q?eriments_Say?=
    ... continually changing synchronization corrections for each clock exist such that the predictions of SR are fulfilled for any local co-moving frame. ... To avoid the embarrassment of that complexity, GPS analysis is now done exclusively in the Earth-centered inertial frame. ... And the pre-launch adjustment of clock rates to compensate for relativistic effects then hides the fact that all orbiting satellite clocks would be seen to tick slower than ground clocks if not rate-compensated for their orbital motion, and that no reciprocity would exist when satellites view ground clocks. ... Now, if one can provide a way for a ground receiver to synchronize its clock with the satellite clock, a simple measurement of the time delay in the signal received from a satellite in view of the Earthbound user, should result in a precise range to that satellite. ...
    (sci.physics)
  • Re: Re: C S Lewis
    ... >> velocity between the earth bound observer and the GPS sattelite, ... > dilation was with a long rod with a light source and reflector at each ... Relativity, both special and general, I highly reccomend the following ... between the observer and the clock, ...
    (talk.origins)