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A Comparative Study of Positioning Errors of a Low Cost GPSReceiver Caused by Old and New Satellites Generations

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The raw position data of a low cost GPS engine was collected and saved for a couple of weeks. In order to separate the database according to satellites generation, a number of algorithms were designed and several software packages developed accordingly. We also designed and implemented some filters to make equivalent conditions and have a reliable error comparison based on satellite generations. Finally we developed a software package to calculate RMS errors of each file. Result was that errors of new GPS generations are less than that of old generations with a ratio of 1 to 1.6.

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