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nps.gov
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Definitions (101)
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Carrier phase
GPS measurements based on the L1 or L2 carrier signal.
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ECEF
see earth-centered earth-fixed
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Carrier-aided tracking
A signal processing strategy that uses the GPS carrier signal to achieve an exact lock on the pseudorandom code.
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Carrier frequency
The frequency of the unmodulated fundamental output of a radio transmitter. The GPS L1 carrier frequency is 1575.42 MHz.
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CDMA
see code division multiple access
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Channel
A channel of a GPS receiver consists of the circuitry necessary to receive the signal from a single GPS satellite.
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Chip
The length of time to transmit either a "0" or a "1" in a binary pulse code. Also, an integrated circuit.
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chip rate
Number of chips per second. For example, C/A code = 1.023 MHz.
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Circular Error Probable
In a circular normal distribution, the radius of the circle containing 50 percent of the individual measurements being made, or the radius of the circle within which there is a 50 percent probability [..]
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Civilian code
see C/A code.
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