Satellite navigation signal simulation method for low-orbit satellite as terminal carrier

• Main Authors: ZOU GUOJI, JI YANGLEI, CAI XIA, ZHANG XIAOMIN, MA WENCONG, WAN CHENGCHENG
• Format: Patent
• Language: Chinese; English
• Published: 02.04.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention provides a satellite navigation signal simulation method for a low-orbit satellite as a terminal carrier, which comprises the steps of correspondingly improving a traditional ionospheremodel by considering the characteristics that the low-orbit satellite is positioned in the middle of an ionosphere and a navigation signal does not completely pass through the ionosphere on the basisof the traditional satellite signal simulation, and multiplying by a scaling factor highly correlated with the low-orbit satellite to obtain an ionosphere layer model suitable for the low orbit. Besides, the ionosphere model cannot completely represent the real ionosphere state, and only 60%-70% of real time delay can be corrected generally, so that the pseudo-range superimposed ionospheric erroris multiplied by a coefficient 1.3 to achieve a state closer to the actual state. When a navigation message is generated, ionosphere parameters are directly set. By means of the method, analogue simulation of satellite navigati