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Real-time dynamic differential positioning method and device thereof

A technology of real-time dynamic difference and positioning method, applied in the field of global navigation satellite system satellite positioning, which can solve the problems of low efficiency of positioning calculation and long time taken by multiple ambiguity searches

Active Publication Date: 2015-12-16
SHANGHAI HAIJI INFORMATION TECH
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Problems solved by technology

[0004] The embodiment of the present invention provides a real-time dynamic differential positioning method and its equipment, which are used to solve the problems in the prior art that multiple ambiguity searches take a long time and the efficiency of positioning calculation is low

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  • Real-time dynamic differential positioning method and device thereof

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] Carrier phase and pseudorange are two basic observations of satellite positioning system. Since the resolution of the carrier phase is much higher than that of the pseudorange, the carrier phase differential positioning technology using the carrier phase is widely used in high-precision static or dynamic positioning calculations. The carrier phase observation is essentially the difference between the phase of the reference signal ge...

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Abstract

The invention discloses a real-time dynamic differential positioning method and a device thereof. The method comprises the steps of acquiring dual-frequency pseudo-range observed values and dual-frequency carrier-phase observed values from a plurality of reference satellites received by means of a reference station together with a moving station; figuring out a carrier phase double-difference equation on the who-cycle ambiguity float solutions of a carrier L1 and a carrier L2 through the equivalent substitution of a wide-lane composite equation and an ionosphere-free composite equation; according to a double-difference pseudo-range equation established based on the carrier phase double-difference equation and the dual-frequency pseudo-range observed values received by the reference station and the moving station, determining a float solution for the double-difference who-cycle ambiguity of the carrier L1 and a float solution for the double-difference who-cycle ambiguity of the carrier L2. The ambiguity searching operation is conducted only once during the entire positioning process, so that the number of the ambiguity searching operation is effectively reduced. Meanwhile, the real-time dynamic differential positioning efficiency is improved on the condition of the loss-free positioning precision.

Description

technical field [0001] The invention relates to a global navigation satellite system (GNSS) satellite positioning method, in particular to a real-time dynamic differential positioning method and equipment thereof. Background technique [0002] With the development of navigation systems, the application range of high-precision positioning is becoming more and more extensive. In the satellite navigation system, the basic principle of positioning is to obtain two basic observations from the navigation system, namely pseudorange and carrier phase. Pseudo-range is an approximate distance obtained by decoding the ephemeris broadcast by satellites. Due to the limitation of chips, the distance can only be obtained with meter-level accuracy. The carrier phase observation is much more accurate than the pseudorange. Taking the carrier at 1575MHZ frequency as an example, each wavelength is only 19cm. Therefore, accurate carrier information is the basic method for high-precision positio...

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Application Information

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IPC IPC(8): G01S19/44G01S19/41
CPCG01S19/41G01S19/44
Inventor 李月光刘欢赵文峰宇伟王凯吉青
Owner SHANGHAI HAIJI INFORMATION TECH
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