New Indicator Of Signal Blocking Degree To Describe Gnss Signal Receiving Environment In Land Road

The conventional indexes used to describe GNSS positioning performance, such as satellite visibility, dilution of precision (DOP), and signal-to-noise ratio are quite useful in the open sky but are not useful in a land road environment. This paper proposes a new index for describing GNSS positioning performance in a land road environment. This new index, which is called SkyView-based DOP (SVDOP), is derived with reference to the SkyView Factor (SVF). The usefulness of the proposed index is analyzed by comparing the SVDOP and SVF in a land road environment after the singularity points are selected and the SVDOP is calculated.