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Today's topics:
* Formula Zero, The First Hydrogen Racing Car - 1 messages, 1 author
http://groups.google.com/group/rec.autos.makers.honda/t/31f9df964bcb925b?hl=en
* Speedometer error - 2 messages, 2 authors
http://groups.google.com/group/rec.autos.makers.honda/t/dd0e0cb203486443?hl=en
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TOPIC: Formula Zero, The First Hydrogen Racing Car
http://groups.google.com/group/rec.autos.makers.honda/t/31f9df964bcb925b?hl=en
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== 1 of 1 ==
Date: Sun, Nov 22 2009 2:45 am
From: jenneylist
Formula Zero, The First Hydrogen Racing Car
http://www.greenautomotive.co.cc/2009/09/formula-zero-first-hydrogen-racing-car.html
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TOPIC: Speedometer error
http://groups.google.com/group/rec.autos.makers.honda/t/dd0e0cb203486443?hl=en
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== 1 of 2 ==
Date: Mon, Nov 23 2009 11:03 am
From: Tegger
Dillon Pyron <invaliddmpyron@austin.rr.com> wrote in
news:gbjhg5taanhs2lvgc7jktvs0grhlf8t59v@4ax.com:
> Thus spake Tegger <invalid@invalid.inv> :
>
>>
>>GPS's are not definitively accurate. There is a fairly large built-in
>>error in all GPS's. GPS satellites are the property of the US
>>Department of Defense, and the military doesn't want you having the
>>same thing they've got for reasons of national security. This is
>>outlined in all the new-car PDI docs issued by Honda for vehicles that
>>have NAVI.
>
> Way incorrect. SA/CA went out long ago. During Desert Storm they had
> to disable it because the DoD couldn't get enough MilSpec GPS units
> and was buying civilian units from Magellan.
>
Then how come all the 2010 PDI docs say this?:
"The GPS (global positioning system) satellites used by the navigation
system are operated by the U.S. Department of Defense. For security
reasons, certain inaccuracies are built into the GPS. This can cause
occasional positioning errors of up to several hundred feet. If the
navigation system indicates your position incorrectly, wait several seconds
until it corrects itself. The system may also correct itself after you make
a turn or cross a road."
If your reported location is incorrect, then it stands to reason that
reported distances may be incorrect as well.
--
Tegger
The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/
== 2 of 2 ==
Date: Mon, Nov 23 2009 4:21 pm
From: Nasty
Tegger wrote:
> Dillon Pyron <invaliddmpyron@austin.rr.com> wrote in
> news:gbjhg5taanhs2lvgc7jktvs0grhlf8t59v@4ax.com:
>
>> Thus spake Tegger <invalid@invalid.inv> :
>>
>
>>> GPS's are not definitively accurate. There is a fairly large built-in
>>> error in all GPS's. GPS satellites are the property of the US
>>> Department of Defense, and the military doesn't want you having the
>>> same thing they've got for reasons of national security. This is
>>> outlined in all the new-car PDI docs issued by Honda for vehicles that
>>> have NAVI.
>> Way incorrect. SA/CA went out long ago. During Desert Storm they had
>> to disable it because the DoD couldn't get enough MilSpec GPS units
>> and was buying civilian units from Magellan.
>>
>
>
> Then how come all the 2010 PDI docs say this?:
>
> "The GPS (global positioning system) satellites used by the navigation
> system are operated by the U.S. Department of Defense. For security
> reasons, certain inaccuracies are built into the GPS. This can cause
> occasional positioning errors of up to several hundred feet. If the
> navigation system indicates your position incorrectly, wait several seconds
> until it corrects itself. The system may also correct itself after you make
> a turn or cross a road."
>
> If your reported location is incorrect, then it stands to reason that
> reported distances may be incorrect as well.
>
>
Considering that my GPS's both know exactly where my house is, and tell
me to turn the wrong way at the end of my driveway onto the north/south
road that runs in front of my house, I gotta think there's some merit to
this.
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