BDS/GPS reference station low altitude angle satellite integer ambiguity determination method

Abstract

The invention relates to the technical field of satellite positioning systems and positioning measurement, and provides a BDS / GPS reference station low altitude angle satellite integer ambiguity determination method. The method comprises the following steps: dividing BDS / GPS high altitude angle and low altitude angle satellites; calculating three kinds of wide lane carrier phase integer ambiguityby using a high altitude angle satellite three-frequency carrier phase observation value and a pseudo-range observation value; calculating the carrier phase integer ambiguity by utilizing the carrierphase observation value for eliminating the ionospheric delay error based on the forced distance limiting relation, and establishing ionospheric and tropospheric delay error models by utilizing the carrier phase observation value; calculating a delay error corresponding to the low altitude angle satellite and the second and third wide lane carrier phase integer ambiguity, and calculating the carrier phase integer ambiguity by using the third wide lane observation data according to the carrier phase observation value for eliminating the ionospheric delay error and a tropospheric delay error model. According to the method, the precision of determining the BDS / GPS low altitude angle satellite carrier phase integer ambiguity can be improved.

Description

technical field [0001] The invention relates to the technical field of satellite positioning system and positioning measurement, in particular to a method for determining the ambiguity of a low-altitude-angle satellite of a BDS / GPS reference station. Background technique [0002] Global Navigation Satellite Systems (GNSS), as an important tool for obtaining location information and time information, is gradually developing and improving. The Global Positioning Systems (GPS) of the United States is the most widely used global navigation satellite system, and the BeiDou Navigation Satellite System (BDS) of China can already provide passive positioning, navigation, and timing services to the world. [0003] Up to now, the GPS satellites in orbit include 31 Medium Earth Orbit (MEO) satellites, and the BDS satellites in orbit include 21 MEO satellites, 9 Inclined Geosynchronous Orbit (IGSO) satellites and 5 geostationary orbit (Geostationary Orbit, GEO) satellites. Compared wit...

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Problems solved by technology

The determination method of the carrier phase integer ambiguity of the BDS reference station takes into account the satellite characteristics of the heterogeneous constellation (MEO+IGSO+GEO), and mainly uses a method similar to GPS to realize the determination of the carrier phase integer ambiguity of the BDS reference station. For geostationary low-altitude GEO satellites, the carrier phase integer ambiguity cannot be effectively determined

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