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sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability).

What’s New in GNSS Simulation?



 
 
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  #1  
Old May 8th 13, 09:10 PM posted to sci.geo.satellite-nav
Sam Wormley[_2_]
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Posts: 775
Default What’s New in GNSS Simulation?

What’s New in GNSS Simulation?
http://www.gpsworld.com/whats-new-in-gnss-simulation/


The spectrum of today’s providers seems to range from highly
sophisticated scientific systems used for development by precision
receiver manufacturers, through systems with GNSS and aiding
solutions, to specialized systems for both general and specific
application developers and also for production test. So this month
I’d like to try to summarize (in no particular order) what some of
the suppliers of GNSS simulation systems are up to, how they may be
positioned in the market and, wherever possible, what we might expect
to see from them in the future.


  #2  
Old May 12th 13, 02:26 PM posted to sci.geo.satellite-nav
oriel36[_2_]
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Posts: 144
Default What’s New in GNSS Simulation?

On May 8, 9:10*pm, Sam Wormley wrote:
What s New in GNSS Simulation?







http://www.gpsworld.com/whats-new-in-gnss-simulation/
The spectrum of today s providers seems to range from highly
sophisticated scientific systems used for development by precision
receiver manufacturers, through systems with GNSS and aiding
solutions, to specialized systems for both general and specific
application developers and also for production test. So this month
I d like to try to summarize (in no particular order) what some of
the suppliers of GNSS simulation systems are up to, how they may be
positioned in the market and, wherever possible, what we might expect
to see from them in the future.


Apologies Sam for using your post.

The problem with researchers since the late 17th century is that they
take it for granted that any type of clock can directly register the
motions of the Earth through external references even though that is
impossible,it may give them an opportunity to create a blizzard of
time abbreviations that appear to have relevance but essentially the
rotating celestial sphere system looms large in their assertions as
well as their conclusions.

Time to wake up guys,if anyone wishes to know what Sir Isaac was doing
with the Equation of Time as absolute/relative time in context of the
Ra/Dec framework then I suggest they take notice of the core system
introduced by the Egyptians where a leap correction is necessary to
keep rotations closely in sync with orbital points of the solstices
and equinoxes -

"Absolute time, in astronomy, is distinguished from relative, by the
equation or correlation of the vulgar time. For the natural days are
truly unequal, though they are commonly considered as equal and used
for a measure of time; astronomers correct this inequality for their
more accurate deducing of the celestial motions. It may be, that there
is no such thing as an equable motion, whereby time may be accurately
measured. All motions may be accelerated and retarded, but the true,
or equable, progress of absolute time is liable to no change.The
duration or perseverance of the existence of things remains the same,
whether the motions are swift or slow, or none at all: and therefore,
it ought to be distinguished from what are only sensible measures
thereof; and out of which we collect it, by means of the astronomical
equation. The necessity of which equation, for determining the times
of a phćnomenon, is evinced as well from the experiments of the
pendulum clock, as by eclipses of the satellites of Jupiter."
Newton,Principia

The followers of relativity are excused and even excluded,because when
Isaac opens his mouth on Roemer's use of the Equation of Time in
respect to his conclusion on finite lightspeed,it is pure bluffing -

" But by an Argument taken from the Aequations of the times of the
Eclipses of Jupiter's Satellites, it seems that Light is propagated in
time, spending in its passage from the Sun to us about seven Minutes
of time: And therefore I have chosen to define Rays and Refractions in
such general terms as may agree to Light in both cases" Newton,
Optics.

With all due respect to silent contempt,there are so many levels to
this thing that I don't blame some who are comfortable with relativity
as a sort of voodoo exercise as opposed to the destructive agenda
which belongs to Newton and that vicious strain of empiricism.
 




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