I have trouble sometimes with my GPS tracker when I ride in the same area where Karens body was found. Its a heavy treed area - and sometimes my GPS (Map my ride app) is perfect - and other times it has trouble connecting. The same ride done twice can show a discrepancy of a few hundred metres.
Does this happen with mobile towers?
Can the ping be a little out of wack just like a GPS can be?
Perhaps putting the ping closer then what it was recorded?
I have no idea. It all seems so complicated to me.
This article in regard to Jill Meagher
The long arm of modern technology
http://www.theage.com.au/victoria/the-long-arm-of-modern-technology-20120929-26skq.html
Sometime after the moment Ms Meagher was captured on CCTV speaking to her alleged killer, police will allege he removed the SIM card from her phone, sources told The Sunday Age yesterday.
But not before investigators used information provided by Vodafone and the operators of the CityLink tollway to narrow the search for their main suspect. The Sunday Age understands cameras on the Tullamarine Freeway may have captured footage that helped lead to Adrian Bayley's arrest.
Even though Ms Meagher's phone was low on power and had turned itself off, it could still be traced, said Nigel Phair, director of the Centre for Internet Safety at the University of Canberra and a former officer with the Australian Federal Police.
The location of common smartphones with geo-location devices, such as the iPhone or Android phones, could be traced to within a metre or so, he said. Less sophisticated mobile phones can still be tracked between transmitter towers.
''It depends on the phone and the carrier, but there's an awful lot of information coming from those phones,'' he said. ''If the phone is turned on, there's a lot more information available about its location, but even when turned off, they can give clues. Investigators may not be certain of locating the phone but there are some avenues of inquiry that may be productive.''
