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Future Vehicles 2008 Subaru Impreza WRX
1480 messages, Last post on Jul 06, 2009 at 4:52 PM
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Replying to: ateixeira (Sep 19, 2007 10:02 am) -mike
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Replying to: paisan (Sep 19, 2007 6:06 pm)  I'm assuming the heaviest satellite coverage is over the heaviest population areas, and I've read that coverage ranges from 8 satellites in continuous line of sight in some latitudal zones, to 5 in others. You need 4 satellites for accurate GPS tracking, so in some zones there's not as much backup coverage if something's blocking line of sight.
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Replying to: rsholland (Sep 19, 2007 7:28 am) How can it work without a satellite? The term is dead reckoning, and it uses your last known position and the sensors mentioned (speed, heading, pitch/yaw or steering wheel angle) to determine position. The algorithm is designed to switch back and forth as it needs to - satellites are preferred but dead reckoning can work intermittently as necessary as well. Its pretty amazing how far these have come. When we were doing interface evaluation on the Magellan 750 Nav (better known as "Hertz Neverlost" there were limited connections to vehicle information. Now some handheld models include position sensors for dead reckoning: Garmin StreetPilot 7500 |
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Replying to: paisan (Sep 19, 2007 6:06 pm) I have the older C series models, the newer ones have SIRF technology and quicker/better reception. I'm sure that helps. It's never really been a problem, just some times it can take a minute to establish the original signal when I power it on. |
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Replying to: rsholland (Sep 19, 2007 7:36 am) The Garmin type systems (I have a Garmin 660 with the newer Sirf Star III chip) does not do as well in such situations. My point of comparison is with my Garmin and my Honda Odyssey's built-in NAV. Garmin does have a model with dead reckoning (one of their 7-series model ??) but then that has to be professionally installed into the car's controls and I assume you lose some of the portability. |
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We recently did a 2200 mile trip from MN to TX and back in the WRX, using the Garmin 660 portable NAV. On the way to Dallas, after a while, it took us through a weird set of back country roads, when the whole 1000 mile distance could be covered by just sticking to I-35S. I was disappointed in the NAV engine, since the Odyssey's system would never have done that. On the way back, it tried to do the same but I deliberately ignored the direction to take the back-road hwy route and stuck to I-35N, and from then on, the Garmin then re-directed through I-35N. That was certainly weird, especially since it was set at "Fastest time". In other words, if I did not know about the I-35N situation and relied on the NAV's direction, it would have given me a guided tour of all the backroads from Dallas to MN. Also, unlike other sophisticated NAV engines, there is no option to avoid a certain road/hwy, unless you "detour" once the trip is underway or deliberately ignore the NAV's direction (as I did). You will have to stick to whatever the NAV engine comes up with....I think this is a serious shortcoming in the Garmin 660.
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Replying to: aaykay (Sep 20, 2007 9:25 am) I see what you mean, though. If I have a pet peeve, it's that mine (for whatever reason) simply doesn't accept the fact that the 404 bypass around Bridgeville is quicker than driving through downtown at 25mph. I deliberately miss the turn, it wants me to make a U-turn, then a left, then another left. It doesn't want me to take the bypass until I'm within a mile of the bypass. Very strange because I also have fastest time selected. I'd rather go 55 then 45, vs. 25 the whole way with 2 stop lights and speed traps all over the place. |
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Replying to: xyzzer (Sep 18, 2007 10:33 pm) |
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| Hi all, I am from Canada ... I am thinking of getting a wrx, never driven a Subaru before but like the all wheel drive because of the weather here. Any one from BC here can advise the gas mileage and insurance of this car ??? (it is the ICBC ), my two major concerns of this car. Thanks | |
Oh by the way, assuming the car insurance has no discount... and also what is the maintenance cost, approx is fine
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