Dual GPS receiver ?

**GT65coupe** · 10-13-2004, 10:58 PM

Hi guys,

Is it possible to use 2 GPS receivers at the same time?
for more accuracy?

Stephane

**Quattro** · 10-13-2004, 11:03 PM

I haven't seen it done before. But I can't see it making a difference. Wouldn't both the receivers be locked to the same sats? So what would be the point of haveing two.

**GT65coupe** · 10-13-2004, 11:05 PM

Originally Posted by Quattro-A4

So what would be the point of haveing two.

well i don't know, that's why i am asking

maybe to boost reception? I don't know

**HybridFox** · 10-13-2004, 11:10 PM

basicaly from what i here the triangulate your position to within about 5 meters of acuracy.
so it would be my guess that even if you did get it to work the best it would do is give you two positions 1-5 meters apart from each other so you could jus imagine yourself inbetween them
best i can do

**Nav_Attack** · 10-13-2004, 11:10 PM

that seems unlikely to help too much.. maybe if you wrote a program to average the position of the two, you'd get a slightly more accurate reading on where you are.. but i've found it to be fairly accurate for the most part.

for boosted reception, theres a thread floating around somewhere about putting a refridgerator magnet under the receiver for increased reception (aka faster locking)

**blackpacu** · 10-13-2004, 11:12 PM

I dont think it would make a difference if you had 2 or not
I think quattro is right, they would just look on to the same sats
I also havent seen any gps software that would be able to utilize 2 gps recievers either

If you want to get better reception, i think getting a good reciever would be a better solution

**Naamanf** · 10-13-2004, 11:13 PM

Actually more receivers will give you a more acurate position, but you would have to have software the takes into account the location of each receiver. There are multi-receivers systems that can give position within an inch or so.

**Big Zack** · 10-14-2004, 12:31 AM

I have two GPS receivers; one built into my laptop and the other is a USB puck.

I have compared reading from two in two different applications, but I am not aware of any standard software (iGuidance, Copilot, SAT, Street Atlas) that will let you use more than one GPS receiver at a time.

-Z

**Dominik** · 10-14-2004, 04:15 AM

D3 SDK lets you take data from a Buffer which you could fill by reading the GPS data stream yourself. It wouldnt be too hard to read the COM port data from each of the GPS and do some calculations before pushing it into the buffer.

The thing i thought of was to have the GPS doing the readings half a second off synch. thatway you would get GPS signals every 0.5seconds instead of once per second...

**GT65coupe** · 10-14-2004, 04:39 AM

Originally Posted by Dominik

D3 SDK lets you take data from a Buffer which you could fill by reading the GPS data stream yourself. It wouldnt be too hard to read the COM port data from each of the GPS and do some calculations before pushing it into the buffer.

The thing i thought of was to have the GPS doing the readings half a second off synch. thatway you would get GPS signals every 0.5seconds instead of once per second...

interesting, can you code that?