2009/9/20 John Smith deltafoxtrot...@gmail.com:
https://docs.google.com/Doc?docid=0AZf0jIYShBc0ZGNicXR6OXZfMGdoOGsycGZihl=en
I've made some more tweaks to the above document, I've also had some
private emails from people indicating they think this is a good idea
and we should start thinking
http://www.sparkfun.com/commerce/product_info.php?products_id=8725
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2009/10/1 Liz ed...@billiau.net:
http://www.sparkfun.com/commerce/product_info.php?products_id=8725
I've played with the accelerometer on the android handset I have, it
can do 20 or 30 updates per second depending how busy the CPU is with
other interupts.
I tried to use it to augment GPS data
On 01/10/2009, at 8:53 PM, John Smith wrote:
I tried to use it to augment GPS data but the math ended up doing my
head in so I'm not sure how much use this would be compared to a 4 or
5Hz GPS logger alone unless someone is super duper at velocity math
that is.
It wouldn't be too hard, just
2009/10/1 James Livingston doc...@mac.com:
On 01/10/2009, at 8:53 PM, John Smith wrote:
I tried to use it to augment GPS data but the math ended up doing my
head in so I'm not sure how much use this would be compared to a 4 or
5Hz GPS logger alone unless someone is super duper at velocity math
There's only so much gain you can get out of a GPS antenna. Basically the best
you can do to cover the whole sky (ie:180 degrees x 360 degrees) is 3dBi
(double the power from a perfect isotropic antenna). Certainly you could design
an antenna which had a reduced coverage, such as a cone, but it
2009/10/1 Elizabeth Dodd ed...@billiau.net:
The higher the gain the better the accuracy etc, most GPS antenna are
tiny so if you make a massive one you should get good readings :)
because he wants a degree in surveying, that's why
so he has to produce something new / different
Oh that's easy
2009/10/1 b.schulz...@scu.edu.au:
Accelerometers would be an excellent solution for mapping tunnels though.
Especially since you're only talking about a short-ish time span and you can
potentially have 2 accurate calibration points (one at each end of the
tunnel). I guess if the accelerometer
On Thu, 1 Oct 2009, John Smith wrote:
Oh that's easy then, get him to figure out how to semi-sync with the
secondary GPS frequency, which is what high end surveying equipment
does, you don't need to lock onto the signal, just get close enough to
calculate the atmospheric effects on the L1
2009/10/1 Elizabeth Dodd ed...@billiau.net:
On Thu, 1 Oct 2009, John Smith wrote:
Oh that's easy then, get him to figure out how to semi-sync with the
secondary GPS frequency, which is what high end surveying equipment
does, you don't need to lock onto the signal, just get close enough to
On Thu, 1 Oct 2009, John Smith wrote:
On Thu, 1 Oct 2009, John Smith wrote:
Oh that's easy then, get him to figure out how to semi-sync with the
secondary GPS frequency, which is what high end surveying equipment
does, you don't need to lock onto the signal, just get close enough to
2009/10/1 Elizabeth Dodd ed...@billiau.net:
On Thu, 1 Oct 2009, John Smith wrote:
On Thu, 1 Oct 2009, John Smith wrote:
Oh that's easy then, get him to figure out how to semi-sync with the
secondary GPS frequency, which is what high end surveying equipment
does, you don't need to lock
John Smith deltafoxtrot...@gmail.com wrote:
Or just use a phone with AGPS from the phone network, when I have 3G
connectivity on the phone I usually get 2m accuracy and works inside
buildings etc. Now we just need 3G connectivity Australia wide :D
I thought AGPS didn't help with accuracy, it
2009/10/2 Sam Couter s...@couter.id.au:
I thought AGPS didn't help with accuracy, it just helps with faster
satellite aquisition by downloading ephemeris data instead of searching
blindly for visible satellites. It won't help with surveying a tunnel.
Depends what type of AGPS I think, in the
I've been using Mobile Trail Explorer on my E71.
http://www.substanceofcode.com/software/mobile-trail-explorer/*
*It's far from polished, crashes occasionally, and has a flakey UI, but it
records traces to KML and GPX, and can load OSM map tiles if you have a
Internet connection.
I believe you
It also takes waypoints which is extra useful if you're going to use it
to contribute to OSM.
On Fri, 2009-10-02 at 12:01 +1000, Jason Stirk wrote:
But, save your trace frequently, and don't dare interrupt saving a
trace, lest it eat all your hard work and crash...
Even better, turn on the GPX
thanks for that.. so a 'waypoint' is used for POI contribution?
The OSM maps also have bike and walking trails which Google Maps and
Nokia Maps don't so for my purposes I actually require mobile OSM tomorrow.
Nokia Sports Tracker can save and export tracks to kml so I may just use
that for
Did you have to do anything to get it to work and find your GPS?
It says GPS not found in the settings (Nokia N95)
Jason Stirk wrote:
I've been using Mobile Trail Explorer on my E71.
http://www.substanceofcode.com/software/mobile-trail-explorer/*
*It's far from polished, crashes
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