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Data resolution
Data resolution
7/12/10 4:26 PM
It looks like the data points are taken at one second intervals. Is there a way to increase the frequency to maybe every half second? Or is this limited by the hardware (i realize we are working with a phone here!)?
I am using this for autocross, so the lap times are fairly short, and increased resolution might be nice.

Thanks!
RE: Data resolution
7/12/10 4:32 PM as a reply to Jason Minehart.
Yes, the 1hz sampling is a limitation of the phone hardware. To get a higher rate GPS, you'll need to use an external bluetooth GPS. A Qstarz 5Hz unit is good choice. Trackmaster supports bluetooth via an add-on. You can read more here:

Trackmaster Bluetooth Support

Jeff
RE: Data resolution
8/24/10 2:17 PM as a reply to Jason Minehart.
A friend has an HTC EVO and a BT-Q818X that claims to have a 5HZ data rate. When we do an Excel scatter graph on the GPS data, I get the attached results. Is this going to be typical. I plan to use this setup in an autocross environment. I am wondering if a 10 hz device would be better.



AW
RE: Data resolution
8/24/10 2:29 PM as a reply to Andy Whittle.
It would be helpful to see the raw data, but the data should be more evenly spaced.

Jeff
RE: Data resolution
8/24/10 2:38 PM as a reply to Jeff Trackaroo.
Here you go

http://www.ncs-stl.com/dynolicious/GIR%20Road%20Course%20Laps.xls

Thanks for looking

AW
RE: Data resolution
8/24/10 3:28 PM as a reply to Andy Whittle.
Something doesn't seem to be right with this GPS unit. It appears to be going back and forth between 1Hz and 5Hz.

Jeff
RE: Data resolution
8/26/10 4:26 AM as a reply to Jeff Trackaroo.
Would it be possible to post the excel data from a more textbook data log from a race vehicle and at least a few laps of a track. I am playing with a spreadsheet to develop additional data regarding the drivers racing line, smoothness....

My email is awhittle at NCS <hyphen> STL <dot> com if that is easier

Thanks

Andy