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 Am I Being Technical?, Accessories |
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 Sep 24 2007, 11:18 PM
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Newbie
Group: Members
Posts: 11
Joined: 24-September 07
Member No.: 45,633
Status: 
Location: Las Vegas, NV
Drives: 2008 Lancer GTS
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Am I being technical when I ask for quality items in my new 2008 Lancer GTS?
1.) the gps is not accurate, well I guess it is if you figure that while sitting in the dealership lot, I am theroticly going up and down 200 feet...
2.) the maps are almost 3 years out of date. I travel to and from work, but the streets that I drive on are 5 - 7 years old, but theyre not on the map.. This is in Las Vegas, NV.
3.) the barometric pressure always says 27 milibars, the local news says its 29, whos right? The news or the never changing gps in the car?
What have I tried?
I have tried recalibrating the sensors, all three of them located under the setup button.
I have asked the dealer, they dont know...
I have researched google but havent really come up with anything other than bringing to the CDDB upto date.
Don't get me wrong, I love the car. However, when I paid over 1500 for the navigation unit, i get a better sensitivity from an 80.00(USD) Bluetooth GPS reciever on ebay and my PPC-6700.
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Sep 25 2007, 10:42 AM
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Newbie
Group: Members
Posts: 7
Joined: 19-September 07
Member No.: 45,375
Status:
Location: Calgary
Drives: 2007 Lancer GTS (coming)
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QUOTE(snarf2948 @ Sep 24 2007, 11:18 PM) Am I being technical when I ask for quality items in my new 2008 Lancer GTS?
1.) the gps is not accurate, well I guess it is if you figure that while sitting in the dealership lot, I am theroticly going up and down 200 feet...
I work in a GPS company and I know GPS well. If you are sitting still in the lot and get the height up and down for 200 feet. Something wrong with your GPS unit, even a 100 dollars handheld GPS unit would not do this. However, the up and down could be caused by mulitpath, just wonder if you were parking beside the windows. For more, what is the sky visiablity there? This is what I suggest, try at an open field.
For more, could you define your defination of accurate for GPS, and what environment you use your GPS. If you are downtown with all the tall buildings around you, for GPS only, there is not a single receiver in the world could give you good position.
2.) the maps are almost 3 years out of date. I travel to and from work, but the streets that I drive on are 5 - 7 years old, but theyre not on the map.. This is in Las Vegas, NV.
I beleive you could download the new one on the web
3.) the barometric pressure always says 27 milibars, the local news says its 29, whos right? The news or the never changing gps in the car?
Of course the local news is right, the difference is caused by the cost of the measurement equipment....
What have I tried?
I have tried recalibrating the sensors, all three of them located under the setup button.
I have asked the dealer, they dont know...
I have researched google but havent really come up with anything other than bringing to the CDDB upto date.
Don't get me wrong, I love the car. However, when I paid over 1500 for the navigation unit, i get a better sensitivity from an 80.00(USD) Bluetooth GPS reciever on ebay and my PPC-6700.
[right][snapback]113683[/snapback][/right]
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Sep 25 2007, 04:43 PM
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Newbie
Group: Members
Posts: 8
Joined: 24-September 07
Member No.: 45,614
Status:
Location: PA, USA
Drives: 2008 Lancer GTS
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QUOTE(snarf2948 @ Sep 25 2007, 12:18 AM) Don't get me wrong, I love the car. However, when I paid over 1500 for the navigation unit, i get a better sensitivity from an 80.00(USD) Bluetooth GPS reciever on ebay and my PPC-6700.
[right][snapback]113683[/snapback][/right]
The GPS receiver and the one you bought for your PC are both civilian GPS units and are subject to the limits imposed by the government on civilian use of GPS which includes accuracy and precision. Assuming you are obstacle free and have a clear view of the sky without any type of solar interference, both GPS units will have the same maximum resolution. One is not necessarily more precise or accurate - just to clarify. However, I agree with the maps being from 2005... hopefully there will be an update.
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Sep 25 2007, 08:58 PM
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Newbie
Group: Members
Posts: 11
Joined: 24-September 07
Member No.: 45,633
Status:
Location: Las Vegas, NV
Drives: 2008 Lancer GTS
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All GPS recievers recieve the same signal by the satelites. The satelites and the reciever use the same technology as a radar gun if you would. The time it takes to recieve the signal to the unit by fewer than 4 or 3 or more satelites will triangulate your position and elevation using a known theroy refered to as doppler effect. More precise gps recievers will obtain a signal now as of this date up to 32 satelites in view. I have noticed thhat my car only recieves 10 at max where I am geographicaly located. The reciever may be limited to this amount. However the reciever should be accurate enough to tell that I have not travled a distance of + or - 200 feet wether it be from signal reception or even by the barometric pressure.
Speaking of barometric pressure, the sensor is off by 2 milibars/bars, which is a significant amount. This represnts the difference of a raging storm/tornado and a nice clear day in my part of the world. The typical barometric pressure at sea level at 72 degrees and 0% humidity will be 29.92. Where I live (elevation 2650 in the desert) the typical according to the weather channel and the local news is 29.9~ .. look at www.weather.com and type in zip code 89129. This proves my preception of the pressure being off and not adjustable, nor able to compensate for the minor rising andlowering of pressure which, depending on the type of system for detection of elevation) is incorrect. This shows that the gps reciever/software needs to be updated and or corrected/correctable. Or heres a theory, when the car was shipped, maybe a film of some type was placed over the vent so nothing entered the opening. this causing the inability to sense the pressure difference on the diaphram... If your wondering, I was a aviation electrican for the US Navy (Petty Officer).
Just curious, if anyone else goes to INFO, ENVIORMENT, do they also see 27 inHG? Then when you go to www.weather.com and put in your zip code, does it differ from what your car says? If so, by how much?
enough ranting for now.. I'm just curious if anyone else has the same issue or am I am isolated case?
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Sep 25 2007, 10:44 PM
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Newbie
Group: Members
Posts: 11
Joined: 24-September 07
Member No.: 45,633
Status:
Location: Las Vegas, NV
Drives: 2008 Lancer GTS
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I hear its either the MMC slot behind the display, or also the 3.5 female recepticle on the bottom of the display.. I favor the idea of the MMC slot.. But this is what im thinging.. If we buy the car for say 23K, shouldnt the first update or two be included? Shoot, the maps are 3 years out of date when we bought the car.. Would you buy a brand new 1.2 Ghz computer with 128meg ram and windows 2000 today? Or for others, a brand new 2005 lancer for the same price then today?
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Sep 26 2007, 07:26 AM
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Newbie
Group: Members
Posts: 8
Joined: 24-September 07
Member No.: 45,614
Status:
Location: PA, USA
Drives: 2008 Lancer GTS
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QUOTE(snarf2948 @ Sep 25 2007, 09:58 PM) All GPS recievers recieve the same signal by the satelites. The satelites and the reciever use the same technology as a radar gun if you would. The time it takes to recieve the signal to the unit by fewer than 4 or 3 or more satelites will triangulate your position and elevation using a known theroy refered to as doppler effect. More precise gps recievers will obtain a signal now as of this date up to 32 satelites in view. I have noticed thhat my car only recieves 10 at max where I am geographicaly located. The reciever may be limited to this amount. However the reciever should be accurate enough to tell that I have not travled a distance of + or - 200 feet wether it be from signal reception or even by the barometric pressure.
Speaking of barometric pressure, the sensor is off by 2 milibars/bars, which is a significant amount. This represnts the difference of a raging storm/tornado and a nice clear day in my part of the world. The typical barometric pressure at sea level at 72 degrees and 0% humidity will be 29.92. Where I live (elevation 2650 in the desert) the typical according to the weather channel and the local news is 29.9~ .. look at www.weather.com and type in zip code 89129. This proves my preception of the pressure being off and not adjustable, nor able to compensate for the minor rising andlowering of pressure which, depending on the type of system for detection of elevation) is incorrect. This shows that the gps reciever/software needs to be updated and or corrected/correctable. Or heres a theory, when the car was shipped, maybe a film of some type was placed over the vent so nothing entered the opening. this causing the inability to sense the pressure difference on the diaphram... If your wondering, I was a aviation electrican for the US Navy (Petty Officer).
Just curious, if anyone else goes to INFO, ENVIORMENT, do they also see 27 inHG? Then when you go to www.weather.com and put in your zip code, does it differ from what your car says? If so, by how much?
enough ranting for now.. I'm just curious if anyone else has the same issue or am I am isolated case?
[right][snapback]113806[/snapback][/right]
You were using military GPS, they can use different satellites and have a better accuracy. Granted the civi's should let you know if you moved +-200 feet, but again read above as to their precision allowed by US Federal Law. As for the barometric information, since it doesn't give you tenth's place you can only assume that the most significant digit is the ones place. Thus it can be off as much as 1 full digit. i.e. 24.3 may round up to 25 or round down to 24. The sensors aren't that awful specific and they don't need to be. If you are that worried about it, break out your soldering iron and a proto-board; It's consumer grade, you won't get the accuracy or precision as you would with military grade. I will look at mine after work today and see what it says, then let you know. Honestly I looked at it once when I first got the car and haven't looked at it again as I don't even look at the tv/internet for the weather - I just drive. :banana: Edit: Ok - today the barometer said 28... I live in PA, about 2100 feet up on the side of a hill/mountain... I checked the weather on the web and it said 28.2, I'm assuming it round down then.
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Sep 27 2007, 10:03 PM
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Newbie
Group: Members
Posts: 11
Joined: 24-September 07
Member No.: 45,633
Status:
Location: Las Vegas, NV
Drives: 2008 Lancer GTS
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ok,, so i can agree that it may be rounded up or down to the nearest whole number. I will conceed to this. However, I should take a picture of mine tht is 2 whole numbers off.. My pressure here in vegas is typicaly 29.92 .. 29 or 30 I would accept, however it does show 27 and appears to never change.. My dealership cant seem to explain any of my questions.
I guess I may be too technical or requesting too much since i did pay what, 2K for the indash unit?
After reading and searching on the internet, I have found that the SA was turned off in 2000 increasing the precision of civilian reception. It says it went from within 100 meters to now 10 meters (33.3 feet).. Which is awsome.. I just cant seem to find out anything about the elevation.. I am not concerned with the horizontal position..
I live near the base of the hills in the western portion of las vegas and look down on the strip several miles away. When I get down there it says I have only gone down 300 feet in elevation. The stratosphere is taller than that though..
Can anyone find specs on our navi units? Like the title says, I am technical, maybe a geek though.. :) ...
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