Absolute Elevation ?s

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rrroadster
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Absolute Elevation ?s

Postby rrroadster » Tue Dec 23, 2008 1:32 am

HI,

What exactly is absolute elevation? What sensors do you use to determine it?

I have 3 sessions from VIR Full from three different times over a 1yr time period. The max and min elevations are different between each run. There is about a 6.5 ft variance in total elevation change amongst the runs.

Regards,

KB

Andre' Surles
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Re: Absolute Elevation ?s

Postby Andre' Surles » Wed Dec 24, 2008 11:30 am

rrroadster wrote:HI,

What exactly is absolute elevation? What sensors do you use to determine it?

I have 3 sessions from VIR Full from three different times over a 1yr time period. The max and min elevations are different between each run. There is about a 6.5 ft variance in total elevation change amongst the runs.

Regards,

KB


It is calculated through GPS, there can be a slight GPS drift over time, 6ft is pretty accurate considering what the government will allow.
Thanks
Andre' Surles
Track Systems
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rrroadster
Pedal Cars
Posts: 6
Joined: Sun Nov 11, 2007 11:06 am

Postby rrroadster » Fri Dec 26, 2008 11:55 am

There are guage and absolute pressures. So what exactly is absolute elevation?

Thanks,

KB

Track Systems
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Postby Track Systems » Tue Dec 30, 2008 11:59 am

The elevation is computed the same way as Latitude and Longitude positions by the GPS receiver but is not as accurate as X-Y positions due to the inherent design of the GPS system.

GPS Elevation is the absolute distance above/below 'Sea Level'. Official Sea Level is defined as a certain distance from the center of the earth since sea levels change with tides, etc.

Some places on earth such as Death Valley are below sea level and Traqmate will show these as negative elevations.
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