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We considered the range of PPP online services that solve the problem of high-precision coordinates and receiver time scale shift determination for the RINEX daily records. The comparative estimation of exact indicators of position determination for different geoids is given. The results contains the recommendations for use the online PPP services to solve the problem of time scales comparison.
In modern satellite based navigation systems for aviation applications, Ground Based Augmentation System (GBAS) is set to become an important part of the systems for ensuring safe and reliable Precision Approach (PA) and landing of aircrafts. The performance of GBAS is limited by spatial decorrelation of ionospheric delays (spatial gradients). No significant work has been done on this aspect at low...
L1-L2C is the first dual-frequency pair of civilian GPS signals, expected to become available over the full constellation by 2019. Pre-operational CNAV broadcast is made available to support development of L2C signal processing capability in modernized GPS receivers. The transmission of synchronized L1 C/A and L2C codes by Block IIR-M and follow-on generations of GPS satellites allows GPS receiver...
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