Method and device for fast ambiguity fixation for virtual reference station handover

A technology of a virtual reference station and a fixed method, applied in the field of fixed ambiguity, can solve problems such as time-consuming, and achieve the effect of reducing impact and satisfying uninterrupted high-precision positioning

Active Publication Date: 2022-07-19
QIANXUN SPATIAL INTELLIGENCE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the reference station is switched, the ambiguity of the whole week will change, and it will take time to re-search the ambiguity of the whole week

Method used

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  • Method and device for fast ambiguity fixation for virtual reference station handover
  • Method and device for fast ambiguity fixation for virtual reference station handover
  • Method and device for fast ambiguity fixation for virtual reference station handover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The flow chart of the method for quickly fixing the ambiguity of virtual reference station switching according to the present invention is as follows: figure 1 shown, including the following steps:

[0048] Step 1, let t 1 At the moment, the user's ambiguity has been fixed, and the fixed solution coordinate A of the user point is obtained through RTK calculation as The VRS reference station coordinate is B

[0049]Step 2, with the user's movement, the user's position is changing, and the virtual reference station is switched. user t 2 Move to point C at any time. Due to the change of the virtual reference station, the ambiguity of the whole circle changes, and the fixed solution of point C cannot be obtained. The coordinate of the VRS reference station is D.

[0050] Step 3, select the user and VRS reference station t 1 time and t 2 The common-view satellites at the moment, the satellite p with the highest elevation angle is selected as the reference satellit...

Embodiment 2

[0084] The present invention also provides a fast fixing device for ambiguity for virtual reference station switching, such as figure 2 shown, including:

[0085] The coordinate calculation unit is used to calculate the fixed solution coordinate A of the user's starting point and the coordinate B of the VRS reference station of the starting point; after the user moves, the user's position and the VRS reference station change, and the user moves to point C to obtain the coordinates of the VRS reference station of the moving point. D;

[0086] The reference star selection unit is used to select the user and the VRS reference station at the starting point time t 1 and the moving point time t 2 The common-view satellites are selected, and the reference satellite p and the observation satellite q are selected from the common-view satellites;

[0087] Phase observation and integer ambiguity calculation unit, used to calculate the user at time t 1 Double-difference carrier phase...

Embodiment 3

[0090] The present invention also provides a memory, the memory stores a computer program, and the computer program executes the following steps:

[0091] Calculate the fixed solution coordinate A of the user's starting point and the coordinate B of the VRS reference station of the starting point;

[0092] After the user moves, the user's position and the VRS reference station change, the user moves to point C, and the coordinate D of the VRS reference station of the moving point is obtained;

[0093] Select user and VRS reference station starting point time t 1 and the moving point time t 2 The common-view satellites are selected, and the reference satellite p and the observation satellite q are selected from the common-view satellites;

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Abstract

The invention provides a fast ambiguity fixing method for virtual reference station switching, which includes the following steps: calculating the fixed solution coordinate A of the user's starting point and the starting point VRS reference station coordinate B; the user moves to point C, and obtains the VRS reference point of the moving point Station coordinate D; select user and VRS reference station starting point time t 1 and the moving point time t 2 , select the reference satellite p and the observation satellite q; calculate the user at time t 1 The double-difference carrier phase observations with VRS reference station D are calculated by the user at time t 1 The double-difference integer ambiguity of the carrier phase with the VRS reference station D is calculated by the user at time t 2 The double-difference carrier phase observations with VRS reference station D are calculated by the user at time t 2 The fixed solution coordinates of the moving point C point are calculated from the double-difference integer ambiguity of the carrier phase of the VRS reference station D.

Description

technical field [0001] The invention relates to the technical field of ambiguity fixation, in particular to a method and device for fast fixation of ambiguity for virtual reference station handover. Background technique [0002] Virtual Reference Station (VRS for short), also known as virtual reference station technology, is a network real-time dynamic measurement (RTK) technology. A virtual base station is established near the rover, and the virtual observation value of the virtual base station is calculated according to the actual observation values ​​of the surrounding base stations, so as to realize the high-precision positioning of the user station. [0003] RTK (Real-time kinematic, real-time dynamic) carrier phase differential technology is a differential method for processing the carrier phase observations of two measuring stations in real time. The carrier phase collected by the base station is sent to the user receiver, and the difference is calculated. [0004] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 徐军
Owner QIANXUN SPATIAL INTELLIGENCE INC
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