Can you use 2 reciever at the same time?

[mambojimbo]

I'm just wondering if there is clever piece of software out there that will allow you to connect to 2 different GPS receivers and then produce one more accurate signal from them?

I'm using a windows mobile smart phone and until recently always had a remote (wired) or bluetooth receiver. My latest phone has a built in GPS so I'd a like a piece of software similar to GPS gate but in reverse. That way it could decide which has the most valid reception/position and produce a better stronger final output signal.

Does anything like that exist?

I'm wanting to do this for 2 reasons. My car has a heated front screen which gives poor front reception so I usually stuff my little bluetooth receiver right in the corner which is out side of the wires. Also occasionally I drive built up cities and it would be great to have one reciever in the front & one in the rear screen.

I know I could just mount a remote antenna on my car but I'd like to avoid that for now.

Many thanks

[philpugh]

Not aware of any software that would do this. But you should be able to use a BT connected GPSr with your phone as a 'replacement' for the internal GPSr for most of the available SatNav applications. It may not work with bundled apps (i.e. those provided with the phone) as some manufacturers 'hard wire' the internal GPS to the app. Two receivers would probably not improve accuracy in any case.
_________________
Phil

[mikealder]

Heated screens don't generally affect GPS reception its the screens with an athermic coating that screw up the reception as these contain a layer of titanium (a metal) that effectively blocks out the radio signals the receiver is trying to pick up.

Phils suggestion of a BT receiver is probably the best approach, put it in the rear window powered from the aux 12V socket you often find in the rear of cars these days, if its not got a power socket in this location consider fitting one as its not difficult.

The Holux GPSlim236 is a great unit for such an installation as it has a true on/ off switch so can be left in position without needing to press anything to start the receiver - Its an old device but still has credible performance (I use two of these devices) and they can still be found on fleabay for sale.

As for software to run multiple receivers, this can be done but would require a dedicated application to be written and you would need to use different GPS receivers, one BT, one CF, one Serial and the built in device would provide four inputs but your phone won't support all these hardware types. I had three receivers fitted to the roof of the old Ovlov that all fed in to a different serial ports on the computer in the car a few years ago and to be honest as an experiment is was good fun but when the signal degraded due to tall buildings etc all three had poor DOP figures so averaging a location was a waste of time - Mike

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