On pre-GPS roms, does 911 GPS *REALLY* work?

[arparent]

Agreed, I was referring to 'normal' cellular phones. Not phones with actual GPS in them.

Originally Posted by weedahoe

First of all, go back and read where he said "e"GPS. Not "a"GPS. Secondly, aGPS will never be better that stand-alone GPS. You need to go back to GPS school for GPS v/s aGPS and look at triangulation v/s transponders and how many you need and how close they can pin point your location of within feet v/s yards.

[gbm85]

Originally Posted by weedahoe

First of all, go back and read where he said "e"GPS. Not "a"GPS. Secondly, aGPS will never be better that stand-alone GPS. You need to go back to GPS school for GPS v/s aGPS and look at triangulation v/s transponders and how many you need and how close they can pin point your location of within feet v/s yards.

First of all, YOU need to go back and read where I said CDMA E911 IS aGPS.

Second, I never said aGPS was more accurate! I said it is easier to get a fix with aGPS. Most stand-alone GPS units will not get a fix inside, at all. Our crappy little Moguls with their tiny radios routinely get fixes inside.

Third, don't be such a ****ing ****. I wasn't rude with you, so you had no reason to be rude to me.

[frazell]

Originally Posted by Mylt1

GF is a 911 supervisor and yes, they can track you but its not real time so to speak. they get the initial GPS data from the call then if your moving they can rebid it and it will update the GPS location. its not real time but by rebiding it they can track you.

Sounds right as calling 911 on my Mogul enters a "Emergency Mode" or something that I then have to exit out of. The phone stays in 1X the whole time it is in Emergency Mode too so I'm assuming it is keeping an open line to Sprint for the 911 station to ping.

[arparent]

Originally Posted by gbm85

First of all, YOU need to go back and read where I said CDMA E911 IS aGPS.

Second, I never said aGPS was more accurate! I said it is easier to get a fix with aGPS. Most stand-alone GPS units will not get a fix inside, at all. Our crappy little Moguls with their tiny radios routinely get fixes inside.

Third, don't be such a ****ing ****. I wasn't rude with you, so you had no reason to be rude to me.

aGPS is 'assisted' GPS. This means that triangulation of position via cell towers is used to assist the GPS in getting a lock. Essentially, they work together to get a faster lock on the GPS satellites. This is true for phones that have true GPS in them, like the mogul. However, not all CDMA phones have GPS technology in them, and those phones rely entirely on signal triangulation. Signal triantulation is slow, inaccurate, and useless for tracking movement. Many people (and cell phone sales people) refer to this technology as 'GPS' or 'aGPS', but it is not technically GPS at all.

Originally Posted by frazell

Sounds right as calling 911 on my Mogul enters a "Emergency Mode" or something that I then have to exit out of. The phone stays in 1X the whole time it is in Emergency Mode too so I'm assuming it is keeping an open line to Sprint for the 911 station to ping.

You are correct. The open line is needed to transmit your location to the 911 center, even after your call is ended (as long as you are still in emergency mode). The open line is also used as kind of a 'signal boost' to keep connection with towers and continue to report location based on signal triangulation. The phone switches to 1X so that it can use more transmission power and multiple towers, including those belonging to other CDMA networks. Some non-mogul phones stay in emergency mode until the next phone call is made or the power is cycled. Sometimes the user is not even aware that emergency mode exists.

[chevyforlife]

so in English don't make a prank 911 phone call on your mogul, touch,etc,etc, cause they will find out were you're at in a sense, and not to mention its a felony...

just my two cents.

~chevy

[mastergadgets]

Originally Posted by arparent

E911 GPS is not really GPS. It triangulates your approximate location based on cellular tower signals. It isn't useful for anything moving... like say, navigating while driving.

You are so full of it your eyes are brown!!!!!

[weedahoe]

Originally Posted by mastergadgets

You are so full of it your eyes are brown!!!!!

Now hold on Noob because youre using strong words for being new and you need to take a step back and understand what part he is referencing.

He said "E911 GPS is not really GPS. It triangulates your approximate location based on cellular tower signals. It isn't useful for anything moving... like say, navigating while driving."

It is very true E911 triangulates your position and well all know while it isnt exact, it is very close within a few feet or yards. When he says it isnt useful for anything moving or navigating you have to understand he is referencing that E911 doesnt help us when it comes to use trying to use "GPS" to navigate. If E911 triangulates then obviously if you move around it is going to continue to track you but that is only good for emergency personel and not for the average everyday user who would need GPS to do that with. So while E911 is good for emergency response personel only, GPS is only good for the consumer and owner who is trying to navigate somewhere. This makes them different yet cousins.

[arparent]

Originally Posted by weedahoe

Now hold on Noob because youre using strong words for being new and you need to take a step back and understand what part he is referencing.

He said "E911 GPS is not really GPS. It triangulates your approximate location based on cellular tower signals. It isn't useful for anything moving... like say, navigating while driving."

It is very true E911 triangulates your position and well all know while it isnt exact, it is very close within a few feet or yards. When he says it isnt useful for anything moving or navigating you have to understand he is referencing that E911 doesnt help us when it comes to use trying to use "GPS" to navigate. If E911 triangulates then obviously if you move around it is going to continue to track you but that is only good for emergency personel and not for the average everyday user who would need GPS to do that with. So while E911 is good for emergency response personel only, GPS is only good for the consumer and owner who is trying to navigate somewhere. This makes them different yet cousins.

Very well stated. Thankyou. We are not opposed to debate on this forum. However, when one disagrees with another, it would be useful to provide some technical information as to why one may be wrong. Resorting to such vulgar statements does not impress anyone, and certainly does not get your point across. I have based my explanation on how it was explained to me by a former instructor at my college who was a retired cellular communications engineer. I, and most rational people, would consider this a fairly credible source.

[arparent]

Originally Posted by chevyforlife

so in English don't make a prank 911 phone call on your mogul, touch,etc,etc, cause they will find out were you're at in a sense, and not to mention its a felony...

just my two cents.

~chevy

Indeed. It wouldn't be a smart idea.