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Possible Use of a GPS Receiver as an Acceleration Sensor
Appendix D
Possible Use of a GPS Receiver as an Acceleration Sensor Research on the possible use of a GPS receiver as an acceleration sensor has been conducted by, for example, Sokolova, Borio, Forssell, & Lachapelle (2010). This will now be described. Consider a receiver on the Earth’s surface that is stationary. Any satellite is moving relative to the receiver. Due to the Doppler Effect, the frequency of the carrier signal broadcast from a satellite differs from the frequency of the signal received by the receiver. This difference in frequency is called a frequency shift. For a specific satellite, the frequency shift is not constant; it varies as the satellite moves across the sky. The rate of change of the frequency shift is called the Doppler rate. Sokolova et al.’s research attempts to gauge the acceleration of a moving receiver from Doppler rate measurements. The researchers devised a mathematical model. This was tested using simulated signals and also actual signals. The results seem to confirm that the mathematical model is satisfactory.
REFERENCE Sokolova, N., Borio, D., Forssell, B., & Lachapelle, G. (2010). Doppler rate measurements in standard and high sensitivity GPS receivers: Theoretical analysis, and comparison. In Proceedings of the second international conference on indoor positioning and indoor navigation (IPIN). Zurich, Switzerland.
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Possible Use of a GPS Receiver as an Acceleration Sensor Research on the possible use of a GPS receiver as an acceleration sensor has been conducted by, for example, Sokolova, Borio, Forssell, & Lachapelle (2010). This will now be described. Consider a receiver on the Earth’s surface that is stationary. Any satellite is moving relative to the receiver. Due to the Doppler Effect, the frequency of the carrier signal broadcast from a satellite differs from the frequency of the signal received by the receiver. This difference in frequency is called a frequency shift. For a specific satellite, the frequency shift is not constant; it varies as the satellite moves across the sky. The rate of change of the frequency shift is called the Doppler rate. Sokolova et al.’s research attempts to gauge the acceleration of a moving receiver from Doppler rate measurements. The researchers devised a mathematical model. This was tested using simulated signals and also actual signals. The results seem to confirm that the mathematical model is satisfactory.
REFERENCE Sokolova, N., Borio, D., Forssell, B., & Lachapelle, G. (2010). Doppler rate measurements in standard and high sensitivity GPS receivers: Theoretical analysis, and comparison. In Proceedings of the second international conference on indoor positioning and indoor navigation (IPIN). Zurich, Switzerland.
155