Under ideal conditions, the correlation peak of navigation signals emitted by the navigation satellites is completely symmetrical, and the pseudoranges obtained by the receiver to different satellites are consistent. However, live signals differ from this ideal due to characteristic difference of satellites’ navigation overload, the troposphere and the ionosphere, multipath effects and other factors, the signals emitted by each satellite reaching the ground show nonideal characteristics and differences on each other resulting in the biases of pseudorange measured by receiver to the different satellites. In this paper, based on the signal correlation domain analysis and observations data domain analysis, we analyzed GNSS navigation signals, respectively with navigation signal quality monitoring equipment and monitoring receiver. The analysis results show that the pseudorange between different satellite navigation signals occur 2–3 ns biases, and the ideality and inconsistency of navigation signals emitted by different satellites might be the main factor of pseudorange biases, and receiver channel design, loop design, and other factors can also affect pseudorange bias value.
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