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Tightly combined RTK positioning method without considering reference satellite transformation

A technology that refers to satellites and positioning methods. It is applied to satellite radio beacon positioning systems, radio wave measurement systems, and measurement devices. It can solve problems such as waste and the inability of a single system to solve observations, and achieve improved strength and utilization of observations. Effects of Sufficient and Increasing Redundancy Observations

Active Publication Date: 2018-06-22
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to solve the problem that the reference satellite changes in traditional RTK positioning and that a single system cannot be solved in some cases, resulting in the waste of observation values

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  • Tightly combined RTK positioning method without considering reference satellite transformation
  • Tightly combined RTK positioning method without considering reference satellite transformation
  • Tightly combined RTK positioning method without considering reference satellite transformation

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing and specific embodiment, further elaborate the present invention, should be understood that these illustrations are only used to set forth the present invention and do not limit the scope of the present invention, after having read the present invention, to the modification of equivalent form and expanded form of the present invention All fall within the scope defined by the appended claims of this application.

[0047] A compact RTK positioning method that does not need to consider the transformation of reference satellites. Based on the basic non-difference pseudorange / carrier observation equation, an observation model that takes into account the inter-system deviation is established. Based on the fact that the inter-system deviation is related to the receiver and frequency, and is stable over time The characteristics are extracted and corrected, and the conversion between single-difference and double-difference and the fi...

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Abstract

The invention discloses a tightly combined RTK positioning method without considering reference satellite transformation. Through improvement of a traditional double difference model, the double difference ionosphere and the double difference ambiguity are rewritten into a mode of inter-station single difference, and each frequency of each epoch selects a reference satellite by itself to avoid theinfluence of frequent transformation of the reference satellite on the positioning solution; on the basis of analyzing time-varying characteristics of pseudo-range / carrier wave DISB, a differential observation equation is composed of overlapping frequency observation values between a GPS and a Galileo system, compared with a conventional RTK, redundant observation is provided, the intensity of anobservation model is improved, the fixed success rate and the first fixed time of the ambiguity can be effectively improved in the case of a long baseline, especially in the case of a small number ofcommon-view satellites in a single system or a sharp change in the number of the satellites, the fixed solution can be effectively achieved, and the stability and continuity of positioning can be improved.

Description

technical field [0001] The invention relates to a multi-system tight combination RTK positioning technology, which belongs to the technical field of GNSS positioning and navigation, in particular to a tight combination RTK positioning method without considering reference satellite transformation. Background technique [0002] RTK technology has become one of the mainstream positioning methods. With the development of GNSS and the new development trend of multi-system fusion positioning, RTK technology uses a double-difference model for calculation. Traditional RTK technology usually selects reference satellites independently for each system to form a dual-difference model. Difference observation equation, that is, loose combination, when there is only one common-view satellite in a certain system, the double-difference observation equation cannot be formed, and the observation value is not fully utilized. If the double-difference is formed through the reference satellite betw...

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Application Information

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IPC IPC(8): G01S19/46G01S19/44
CPCG01S19/44G01S19/46
Inventor 潘树国赵庆高成发高旺张瑞成
Owner SOUTHEAST UNIV
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