iOS Forensics for Investigators by Gianluca Tiepolo
Author:Gianluca Tiepolo
Language: eng
Format: epub
Publisher: Packt
Published: 2022-11-15T00:00:00+00:00
Figure 6.1 â Geographic locations are expressed using latitude and longitude
In the following part of the chapter, we will learn how Location Services works to determine the device's position.
GPS fixes, cell towers, and Wi-Fi networks
The Location Services iOS API uses a collection of technologies known as Assisted GPS (A-GPS) to determine the device's position. The main reason why mobile devices use A-GPS instead of only traditional satellite GPS is that the latter does not perform well inside buildings; it is also slower than other technologies and quickly drains a device's battery. A-GPS works by augmenting satellite GPS by using external sources (such as cell towers) that enhance the speed, quality, and precision of satellite signals. Data received by external sources is then consolidated to figure out the device's precise location.
The following is a list of sources that power A-GPS:
Satellite GPS
Cell towers
Wi-Fi networks
Bluetooth devices
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