Navigation System using VSS
- Thread starter lcater
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The Clarion system I use requires the VSS feed as well for arrival time calculation as it takes in the real speed of the vehicle. Now I can live without arrival time calculation but unfortunately the nav system won't work without it. Don't they think documented that in the brochure. I am pulling it from my current vehicle to install in the NAS but before I start hacking I want to see if anyone else had done it.MUSKYMAN said:
Seems like a nav system would know the true speed. thats one of the primary reasons I have a gps in my 110 since it has oversize tires. Not sure why a nav system would need anything from the truck other than signal, power and ground.
Doug C said:
The Clarion system is a doubledin 7" DVD player with navigation system. I have a tom tom, I have a Garmin, which I use in other vehicles and the Clarion is by far the best. The only bugger of the thing is it needs the VSS or it won't work. And yes all the other do the normal stuff without the VSS, however the higher end units use actual vehicle speed since satellite only speed is based on as the crow flies and does not account for ups and downs of hills. So it creates a moving average. Using VSS provides real time data on speed. Again, I'm not hung up on either/or, it's just the Clarion is a great system which just happens to needs VSS or it becomes an expensive dvd/ipod player.
I guess no one has installed a navigations system then using the VSS.
Just as closer to this thread, I was able to install the unit in the D90 and hook into the VSS cable. The only issue was installing a double din deck into the mud panel. The brackets to support the panel, impede some of the depth. So you can cut it and risk expoure to the elements, or have amdf panel made to allow the head unit to stick out about 1".
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D Chapman
Guest
Fitted a similar requirement-Pioneer to a 95 LWB using the VSS signal. Works well, but I am still impressed with the factory unit in my LR3.
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D Chapman
Guest
I don't understand how this VSS thing is a feature. It sounds so shitty to me.
Your GPS knows how fast your going.
Your GPS knows where you're going.
Why not allow the GPS to tell the software how long it's going to take you? I know this is how the Kenwood/Garmin works....
Hell, about every unit out there works like this now.
Tapping into the VSS sounds cheesy.
But please post some pics of this in your 90. I bet it looks like shit and I need a laugh.
Your GPS knows how fast your going.
Your GPS knows where you're going.
Why not allow the GPS to tell the software how long it's going to take you? I know this is how the Kenwood/Garmin works....
Hell, about every unit out there works like this now.
Tapping into the VSS sounds cheesy.
But please post some pics of this in your 90. I bet it looks like shit and I need a laugh.
D Chapman said:
Well I probably won't give you the satisfaction on this one Don. Once again you've been able to take what started out as a legitimate question and turn it into your personal "let's $hit on this guy" post. This interweb stuff is real neat eh?
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D Chapman
Guest
Actually, it was probably a legitimate thread until you crammed a double din, POS, out dated, hunk of shit head unit into a Mud-UK console and mated it to a hunk of shit Clarion MAX675VD.
Everything about your set-up sucks. You did not research on wtf you were installing. You probably found this deal on ebay because someone else was smart enough to see what a hunk of shit this system was compared to the others on the market. It's either that, or the head unit is recycled from another vehicle..... No one in their right mind would buy this system. No one in there right mind would attempt to install this into a Mud-UK console in their Defender.
It's not that the Defender deserves a killer, state-of-the-art system, either. Because is doesn't. It's a Defender, not a Lexus. All the dancing lights, colored buttons, and wicked awesome totally cool graphics do not fit a Defender.
If this was truly a thought out system, you would have junked that Clarion NAX970HD POS. You would have understood that it does not fit a Mud-UK console. You would have simpley installed a screen with a system that has an iPod interface that actually works.
Everything about your set-up sucks. You did not research on wtf you were installing. You probably found this deal on ebay because someone else was smart enough to see what a hunk of shit this system was compared to the others on the market. It's either that, or the head unit is recycled from another vehicle..... No one in their right mind would buy this system. No one in there right mind would attempt to install this into a Mud-UK console in their Defender.
It's not that the Defender deserves a killer, state-of-the-art system, either. Because is doesn't. It's a Defender, not a Lexus. All the dancing lights, colored buttons, and wicked awesome totally cool graphics do not fit a Defender.
If this was truly a thought out system, you would have junked that Clarion NAX970HD POS. You would have understood that it does not fit a Mud-UK console. You would have simpley installed a screen with a system that has an iPod interface that actually works.
the vss makes complete sense. if you drive across the country using the gps to track the distance it is WAY off when you get there. as mentioned before it doesn't know you are going up a steep hill at 50mph it thinks you are going straight at 48mph.
the vss thing will help with dead reckoning so that if you go into an area where you loose signal for a bit it will assume you are still on the road and use the vss data to maintain to the best of the units ability where you , are/should be , until you regain a satellite connection.
the vss thing will help with dead reckoning so that if you go into an area where you loose signal for a bit it will assume you are still on the road and use the vss data to maintain to the best of the units ability where you , are/should be , until you regain a satellite connection.
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D Chapman
Guest
nosivad_bor said:
That's bull shit.
The same could be said for 1-mile. If you look down on a map and draw out one mile by some unit of measure or by just drawing a straight line, does that mean it's actually 1-mile?
It's like when you go over a MTN. From point A to point B may be 10-miles by road. But if we used your logic it may only be 5-miles. Yet, the GPS systems today do not say 5-miles - they're smart enough to know better.
GPS systems do not measure by nautical miles unless you set the preferences that way.
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D Chapman
Guest
Also, by following the nautical mile logic, the GPS speed-o would be off when going up or down hills. I've never noticed this to be the case.
Futhermore, about every GPS system I've seen displays altitude. How does the GPS know altitude? Is there a little sensor in there that measures pressure? I think not.... The GPS knows when you're going up and down. It does not need a VSS to tell it this.
Futhermore, about every GPS system I've seen displays altitude. How does the GPS know altitude? Is there a little sensor in there that measures pressure? I think not.... The GPS knows when you're going up and down. It does not need a VSS to tell it this.
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every time i drive across the country these errors become very evident. I driven across the country from PA to AZ about ten times in the past three years. I never count on the GPS for distance it's always wrong.
Yes the unit knows you are going up in altitude but not accurately because it is just a byproduct of the algorithm used to figure out your coordinates. It is designed primarily in civilian models to know you X and Y coordinates, and Z is mainly considered as a side benefit. WAAS and other land based beacons give the GPS a reference point which help it to keep it accurate but it is not as good at altitude as you might think.
A good aviation GPS will have a barometric sensor built in to supplement the GPS calculations.
If you drive the rockies you will find the GPS will frequently be off a thousand feet or more in the mountains.
Yes the unit knows you are going up in altitude but not accurately because it is just a byproduct of the algorithm used to figure out your coordinates. It is designed primarily in civilian models to know you X and Y coordinates, and Z is mainly considered as a side benefit. WAAS and other land based beacons give the GPS a reference point which help it to keep it accurate but it is not as good at altitude as you might think.
A good aviation GPS will have a barometric sensor built in to supplement the GPS calculations.
If you drive the rockies you will find the GPS will frequently be off a thousand feet or more in the mountains.