Network real time kinematic (RTK) instant locating method based on big dipper tri-band wide-lane combination

A positioning method and network technology, applied in the field of global navigation satellite system satellite positioning, can solve problems such as affecting the timeliness and continuity of network RTK positioning, unable to be fixed for a long time, and long initialization time of the user terminal.

Inactive Publication Date: 2014-10-22
SOUTHEAST UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

At present, in the network RTK positioning, affected by factors such as atmospheric error interpolation accuracy and user station observation environment, the user end sometimes still has the situation that the initialization time is too long (such as greater than 1min) or even cannot be fixed for a long time, and the satellite signal After the lock is lost or the network differential signal is interrupted, it needs to be re-initialized, which affects the timeliness and continuity of network RTK positioning

Method used

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  • Network real time kinematic (RTK) instant locating method based on big dipper tri-band wide-lane combination
  • Network real time kinematic (RTK) instant locating method based on big dipper tri-band wide-lane combination
  • Network real time kinematic (RTK) instant locating method based on big dipper tri-band wide-lane combination

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Embodiment

[0060] Example: such as figure 2 The network diagram of reference stations shown is based on the observation data of 6 reference stations in the first phase of the Beidou ground-based augmentation system project in Jiangsu Province at 1:00-2:00 UTC on May 6, 2014 for experimental calculation. The reference stations all contain BDS / GPS / GLONASS three-system data and the Beidou system contains three frequency point data. In the experimental calculation, the four stations NJMJ, NJTQ, NJLS and NJLT are used as reference stations to form two triangular calculation units, and the two stations NJLH and NJCH are used as user stations to conduct dynamic calculation experiments. The experiment adopts network RTK technology The commonly used VRS mode in There are 9 Beidou satellites available in this period, and the C09 satellite with the largest average elevation angle in the period is used as the reference satellite.

[0061] (0,-1,1) and (1,-1,0) combined ambiguities of two user sta...

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Abstract

The invention discloses a network real time kinematic (RTK) instant locating method based on big dipper tri-band wide-lane combination. A network RTK data processing center uses a continuous operational reference system (CORS) to real-timely generate and broadcast a virtual observing value with double difference convection layer and ionized layer delay correction information; a user station uses a three-carrier ambiguity resolution (TCAR) method of carriers, pseudo-range combination and step-by-step resolving to rapidly fix two ultra-wide-lane or wide-lane ambiguities so as to obtain a lowest noise wide-lane ambiguity which corresponds to the observing value and is used for locating resolving, and finally, the wide-lane observing value of the fixed ambiguity and atmosphere delay correction which is obtained through interpolation are utilized to perform real-time kinematic locating resolving. By means of the network RTK instant locating method based on the big dipper tri-band wide-lane combination, single-epoch accurate fixing of the wide-lane ambiguity can be achieved by the network RTK user station, and thereby, instant centimeter-level locating can be achieved.

Description

technical field [0001] The invention relates to the field of global navigation satellite system (GNSS) satellite positioning, in particular to a fast positioning method for a network RTK (Real-Time Kinematic) user end based on Beidou tri-frequency. Background technique [0002] Network RTK technology is currently one of the most widely used GNSS precision positioning technologies. It allows users to easily obtain uniform, high-precision and reliable positioning results in real time in a large space. It has been widely used in surveying and mapping, precision navigation and many other fields. With the development and application of GNSS technology gradually mature, users put forward higher requirements for the timeliness and stability of positioning results. At present, in the network RTK positioning, affected by factors such as atmospheric error interpolation accuracy and user station observation environment, the user end sometimes still has the situation that the initializ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 潘树国高旺高成发
Owner SOUTHEAST UNIV
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