nps.gov

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Definitions (101)

1

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carrier phase


GPS measurements based on the L1 or L2 carrier signal.  
Source: nps.gov

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ecef


see earth-centered earth-fixed
Source: nps.gov

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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.
Source: nps.gov

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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.
Source: nps.gov

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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.
Source: nps.gov

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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.
Source: nps.gov

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chip rate


Number of chips per second. For example, C/A code = 1.023 MHz.
Source: nps.gov

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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 [..]
Source: nps.gov

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civilian code


see C/A code.
Source: nps.gov


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