A Differential Iterative Filtering Method for GNSS Data
A technology of iterative filtering and calculation, which is applied in the field of GNSS data differential iterative filtering calculation, can solve the problems of bad GNSS original observation data and occasional error data, and the low utilization rate of GNSS data, so as to improve the data utilization rate and data utilization rate high effect
Active Publication Date: 2021-02-19
四川中科川信科技有限公司
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Problems solved by technology
In the existing technology, bad GNSS raw observation data and occasional error data often appear, and the utilization rate of GNSS data is not high
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[0051] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.
[0052] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0053] Such as figure 1 As shown, a GNSS data differential iterative filtering solution method includes the following steps:
[0054] S1. Collect GNSS raw data including N epochs, and convert the GNSS raw data into standard RINEX format to obtain standard GNSS data;
[0055] S2. Classify the stand...
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The invention discloses a differential iterative filtering solution method for GNSS data, which performs multiple iterative filtering solutions on single epoch data, so as to achieve accurate filtering of bad original data and occasional error data with a single epoch as a unit, while ensuring The reliability and integrity of all normal data are improved, the correct rate and utilization rate of data are improved, and the static observation time can be significantly shortened and the data calculation accuracy can be improved under the same observation conditions. This method can be flexibly deployed to the computer to realize fully automatic real-time or post-event automatic calculation of GNSS high dynamic and static data. It can simultaneously output real-time positioning coordinates and static positioning coordinates and accuracy indicators of accumulated data in any time period. The index dynamically adjusts the continuous observation time of static positioning, which ensures the positioning accuracy and does not waste the observation time.
Description
technical field [0001] The invention belongs to the field of GNSS data processing, and in particular relates to a GNSS data differential iterative filtering calculation method. Background technique [0002] The full name of GNSS is Global Navigation Satellite System (Global Navigation Satellite System), which refers to all satellite navigation systems, including global, regional and enhanced, such as GPS in the United States, Glonass in Russia, Galileo in Europe, China's Beidou satellite navigation system, and related augmentation systems. Single-satellite single-frequency only includes satellite data of one type of satellite and one frequency band signal, such as only GPS L1 frequency band, or only Beidou B1 frequency band. In the prior art, bad GNSS raw observation data and occasional error data often occur, and the utilization rate of GNSS data is not high. Contents of the invention [0003] In view of the above-mentioned shortcomings in the prior art, a GNSS data dif...
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IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 王世敏王鑫磊梁小燕刘根友周欣杨大伟
Owner 四川中科川信科技有限公司