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Science Forum Index » Geology - Satellite Navigation Forum » Wanted: GPS application to show relative positions of vehic
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| Eric Anderson |
 Posted: Thu Jan 18, 2007 8:50 am |
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Guest
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I hope this is not too off-topic for this group, but you seem to have
many people with a lot of experience.
I would like to discuss using GPS in automotive test track work with
someone. I am responsible for a govenment test of a multiple sensor
system and the tests will involve tracking 3 vehicles. My interest is
to use the latest technology to make my test track work the most
accurate and fastest to run. I have a decent budget, but I don't want
to expend $25K or $50K unless there is a real labor savings involved,
so I am not necessarily looking for the most expensive solutions, but
if I can rent it, that might also be OK. One of the best solutions is
the OTS RT-3002 (Oxford Technical Solutions RT-3002 accurate to 2 cm in
real time), but it is quite expensive when trying to track the
choreography of 3 vehicles (upwards of $150,000).
I have started off with a Pocket PC accelerometer application using a 3
axis accelerometer and a Hollux 236 GPS receiver to test how accurate I
can maintain an acceleration to speed. My first question would be:
How do I use the data from this and combine it with an on-site
differential GPS system to create the best accuracy.
What kind of application can I find to plot the positions of the
vehicles. Since the map of the track I am using may not be all that
accurate, I am really just interested in an application that will allow
me to postion the vehicles accuately realative to each other and
possibly provide tools to measure the postiions.
What kind of accuracy can I expect after "on-site" differential
correction The specs are:
Non DGPS (Differential GPS):
﹛ Position : 5 - 25 m CEP without SA
﹛ Velocity : 0.1m / sec
﹛ Time : 1 μsec sync GPS time
EGNOS/WAAS /Beacon:
﹛ Position : < 2.2 m, horizontal 95 % of time
﹛ < 5 m, vertical 95 % of time
The GPS engine is design is based on SiRF Star III low power
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