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The key point to high-precision ( centimeter level ) kinematic
differential positioning using GPS carrier phase observations is
rapid resolution of phase ambiguity. Once the phase ambiguity is
obtained, it is able to kinematically position in real time. The
process of Real-Time Kinematic positioning ( RTK ) can be
devided into two stages: ( 1 )initializationing--resolving
phase ambiguity rapidly, and ( 2 )positioning--calculating
coordinates of rover in real time. On-the-Fly ( OTF ) ambiguity
searching resolution is one of these rapidapproaches which can
fulfill the applications in kinematic environment, butit needs
the combinations of dual-frequency observations in calculating.
Take the economic factor into consideration, dual-frequency
receivers areexpensive. As a result, an approach of single-
frequency OTF ambiguity resolution
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