My Gt11 has finally died (after getting drowned in the LOC). Where do i get a GT31 in WA?
surf sail Australia had them last time I was there.
2nd wind may also have them.
PS you can also buy it online from them.
www.surfsailaustralia.com.au/
Save you a trip from Bunno
All sorted thanks guys. Got one locally. I prefer to support the local retailers, besides the after sales service is much better/easier
Bender, make sure that you update the firmware to prevent possible freezing (also has the benefit of the clearer font for us older folk!)
GT-35 was a limited production (maybe 6 made?) engineering sample made by Locosys at Tom Chalko's request for testing a 5hz MTK chip. It contained both the MTK chip (5hz) and the standard Sirf3 chip (1 hz). It did not make it into production and is not available.
Not sure if that is an evil gloat (I have one) or a cry?
In any case, it was not an advantage. The MTK chip does not give binary data or accuracy data.
On the other hand, there is a Ublox chip that is good for 10hz and DOES produce binary data that includes accuracy data. Manfred's GPS-Results software can already read the format to produce results. It would be perfect for us right now but Locosys are not interested in even making some prototypes.
Now that is worth and anguished cry!
Andrew,
Pardon my ignorance but how long will it be till the next generation (5Hz / 10Hz) units will be produced for the market?
PS - It was meant as an evil gloat.
Hi,
The gt31 seems popular,
however is there other brands out there that do the job and are there any that are more slim lined?
I am interested in purchasing one but would like some options for my money.
Thanks guys,
Kind Regards
Walt
Sailquik, what module has a 10hz update? The data sheets suggest, the ones I can find anyway, that they are 5hz.
Hi sailquik,
Thanks for your reply.
It is amazing that there isn't more available in todays market.
I will now shop around for a good buy on the gt31.
Thanks again for your reply
Kind Regards
Walt
We've had 10 Hz GPS systems since 2007 but as Daffy says they are backyard systems that are not approved for speedsailing. They are very accurate and produce the binary data we need but I haven't had the time nor inclination to pursue the project as the GT-11/31 was the primary focus. They are a true 3D GPS system that works just as well on the water or on land. They use the U-Blox Antaris 4 chipset which is switchable for different output rates. I can post some data if anyone really wants to see it but pretty boring stuff. The Alphas are a bit more accurate though.
Roo
From gpspassion forum
Posted - 20 mai 2010 : 12:49:28
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An update for those who are interested. I got a reply from a U-Blox technician informing me that:
1. Ublox4 or the Antaris4 series, can output 10Hz but only in RAW data format and this is only available in the LEA-4T which is a module.
2. Ublox6 can only do up to a maximum of 5hz in chip or module form.
The technician confirmed that by RAW output he means the ublox binary format.
So it appears that Antaris4 10hz output of this type is not 'interpolated'. I guess I will have to reconfigure the G-Rays1 and do some more tests. :-)
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Edited by - professor ratbaggy on 20 mai 2010 12:51:55
Yoyo be careful what binary messages you record at 10 hz, get the wrong ones and it overloads the system causing it to take a time out. Certain messages can be recorded at 1Hz to as the data isn't needed for speed measurement. You'll have to reconfig the system after some testing to get a consistent data stream.
Roo
