[OSM-dev] hacking outdoor GPS devices

[Simon Poole]

The main issue with Micheles project is that 400 Euro is probably a bit 
outside the typical budget for a GPS logger (you also have to add in 
costs for a reasonable antenna, so it is probably more around 450EUR in 
real life). Did he indicate what kind of volume his price calculations 
are based on? I've been eyeing getting the receiver only USB-stick
https://www.optimalsystem.de/os.aspx?x=45 for experimenting.

Simon

Am 20.04.2012 19:01, schrieb 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 EUR
>
> BT allows for configuration / control from a device such as a 
> smartphone. Therefore, no display is required on the logger itself.
> The mIt 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 
> <http://www.kowoma.de/gpsforum/viewtopic.php?f=3&t=3247>
>
> 2012/4/20 datendelphin <mailinglist at osm.datendelphin.net 
> <mailto: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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