Nowadays, a Global Navigation Satellite System (GNSS) unit is embedded in nearly every smartphone. This unit allows a\nsmartphone to detect the user�s location andmotion, and it makes functions, such as navigation, tracking, and compass applications,\navailable to the user.Therefore, the GNSS unit has become one of the most important features in modern smartphones. However,\nbecausemost smartphones incorporate relatively low-cost GNSS chips, their localization accuracy varies depending on the number\nof accessible GNSS satellites, and it is highly dependent on environmental factors that cause interference such as forests and\nbuildings. This research evaluated the performance of the GNSS units inside two different models of smartphones in determining\npedestrian locations in different environments. The results indicate that the overall performances of the two devices were related\ndirectly to the environment, type of smartphone/GNSS chipset, and the application used to collect the information.
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