[OSM-dev] hacking outdoor GPS devices

[Ab_fab]

Hi all,

I've been in touch with Michele Bavaro, who runs One Talent GNSS [1].
He has developped a clever (in my opinion) solution for precise logging.
It includes :

- U-blox Neo-6 GPS chip (6T or 6P)
- a polymer lithium pack with approximately 4 hours of battery life
- uSD card
- USB for recharging and other useful things
- MCX connector with selectable 3.3V or 12V DC output for GPS antenna
- Bluetooth connection
- Price is 400 €

BT allows for configuration / control from a device such as a smartphone.
Therefore, no display is required on the logger itself.
It can be easily charged in a car, thanks to the USB connector

Device is not detailed so far on his website, fur I'm sure he can provide
information.
If you're comfortable with German, usefull information on similar device
(GPS chip in particular) can be found on Kowoma forum [2]

Michele is keen to adjust the hardware if necessary and he promotes the use
of OpenSource software, such as RTKlib (which I think he's porting to
Android)

Hope it helps

[1] http://www.onetalent-gnss.com/
[2]  http://www.kowoma.de/gpsforum/viewtopic.php?f=3&t=3247

2012/4/20 datendelphin <mailinglist at osm.datendelphin.net>

> On 16/04/12 20:26, Mitja Kleider wrote:
> > Hello,
> >
> > I have a few questions regarding outdoor GPS devices:
> >
> > * Are you satisfied with the available devices? What would you change
> first?
> > * If there was a device with open source firmware, would that be an
> > important feature?
> I have mostly one concern with available GPS loggers: the varying
> accuracy. We don't need the 2-3cm accuracy of a surveyors GPS, but a
> little bit more would be helpful. So the two important features would be
>
>  - Show reliably how accurate the position is. Unlike a navigational
> GPS, it's of not much use to have quickly a fix which is 100m away. High
> sensitivity brings multipath reception which can make a track useless
> for mapping. In other words: a mode which only uses a reliable fix.
>
>  - differential GPS. If you want to record some details, positioning a
> gps on a known point can give a huge increase in accuracy. This feature
> would not be that hard to implement, and I am sure some technical
> university would gladly make a project out of it, if we could get access
> to the internal measurements of the chip set and not only the fully
> processed NMEA data.
>
> Datendelphin
>
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>



-- 
ab_fab <http://wiki.openstreetmap.org/wiki/User:Ab_fab>
"Il n'y a pas de pas perdus"
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