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July 2008

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From:
Barbara Burcham <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Barbara Burcham <[log in to unmask]>
Date:
Tue, 1 Jul 2008 16:39:25 -0500
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OK, here are the answers to the questions posed on this mornings email exchanges. Keep those questions coming.

And, thanks again,

Barbara Burcham





One thing I didn't see listed was the GPS accuracy though. Currently with chaperone it gets addresses and locations wrong. Given the results I get I would say its got a few hundred feet of "tolerance"... What is the approximate locational accuracy of the iSight?

The iSight unit is about as accurate as a self contained navigation system.  With GPS of any kind, you can get as accurate as are willing to pay for.  I believe the data sheet specification is something like 30 meters, but that is a statistically derived specification and at any given instant depending on the location of satellites, location of the device in your vehicle, number of surrounding features like skyscrapers, etc., the accuracy might be as poor as 3 times that. I've looked at a lot of tracking data and by and large, the unit posts right in the middle of the traffic lane in which it is traveling. - Don Harrison, Member of the iSight team
Would it be reasonable to track someone's movement on bicycle, bus, or foot?
Yes.  At speeds below 10MPH, the device will post once every 1/8 mile, and the battery will last many hours.  Speed calculations are not as accurate at that speed.  - Don Harrison, Member of the iSight team

How about an option for it to monitor a connection to the car's 12V battery, say, through the cigarette lighter or under the dash?  It would be difficult to disconnect it and connect it to another 12V source without interrupting the power for a few seconds.  It could report +12V interruption times and durations to the tracking user.  How about a button on the unit that the tracked people could press to indicate an emergency or while on the phone to prove the unit is in their possession at that time rather than with their friend at the library?  Of course, nothing would beat having it built into a phone.
The unit will post a message when it is disconnected from the car's power port (or cigarette lighter).  The problem is that most if not all Japanese and Korean cars turn off their power ports when the key is turned off, so in that case you have to be careful interpreting the information.  Another way to determine if your teen is trying to trick the tracker is to monitor the odometer reading for both the device and the vehicle.  Any major differences could give you some insight that something is amiss.  Checkout this section of the users manual: http://www.getisight.com/UserManual/iSight%20User%20Manual%201.0.htm#_Toc201564895
The unit does have several buttons you can use to send you messages when they are pushed, or they are pushed within a specific GeoFence.  More here: http://www.getisight.com/UserManual/iSight%20User%20Manual%201.0.htm#_Toc201564884.  Hope this helps!  - Don Harrison, Member of the iSight team
My concern would be the transfer of the unit to another vehicle easily, it should contain something that would notify if a transfer to another vehicle had taken place.    Let's say your youth decides to take a trip and doesn't want you to know about it... puts it in their friends car (which coincidently is going to the library)... and takes their trip out of state.   Also the unit could be mistaken for a object that may want to be stolen, I would think it should be hidden with a safety seal and a remote antenna mounted in the window.
Good luck either way !
The unit will post a message when it is disconnected from the car's power port (or cigarette lighter).  The problem is that most if not all Japanese and Korean cars turn off their power ports when the key is turned off, so in that case you have to be careful interpreting the information.  Another way to determine if your teen is trying to trick the tracker is to monitor the odometer reading for both the device and the vehicle.  Any major differences could give you some insight that something is amiss.  Checkout this section of the users manual: http://www.getisight.com/UserManual/iSight%20User%20Manual%201.0.htm#_Toc201564895  - Don Harrison, Member of the iSight team


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