A gnss data processing method that can weaken multipath effect
A multi-path effect and data processing technology, applied in the direction of instruments, measuring devices, satellite radio beacon positioning systems, etc., can solve the problems that the multi-path effect cannot be eliminated and the adverse effects of construction can be solved, so as to weaken the multi-path effect and ensure The effect of monitoring accuracy
Inactive Publication Date: 2018-05-11
WUHAN UNIV
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Usually, the environment at each point is very different, and the conventional relative positioning method cannot eliminate the multipath effect, which will lead to a deviation of centimeters or more in the positioning result, which will have an extremely adverse impact on the construction
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[0032] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0033] See figure 1 , this embodiment is aimed at high-rise buildings, in order to facilitate the construction of the top of the high-rise building, select an observation point on the ground near the high-rise building with a wide field of vision, stable geology, no signal interference and no reflectors, and set up a GNSS receiving device at the observation point as a reference point . On the construction floor at the top of the high-rise building, three GNSS receiving devices are set up as monitoring points, which are respectively recorded as monitoring poi...
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The invention discloses a GNSS data processing method capable of weakening a multi-path effect. The method comprises the steps of: S1, setting a reference point and monitoring points; S2, utilizing a GNSS receiving device to carry out continuous and synchronous observation, and obtaining observation data; S3, carrying out baseline resolving of a unified static mode on the observation data; S4, obtaining the baseline component of each epoch by means of the baseline resolving of the static mode; S5, forming a baseline component time sequence by the baseline component of each epoch, and segmenting the baseline component time sequence into subsequences according to multi-path repeated period segmentation; S6, carrying out wavelet decomposition and reconstruction on each subsequence; S7, calculating the mean value of each kind of baseline components respectively in the all reconstructed subsequences, and obtaining final baseline components; and S8, fixing the coordinates of the reference point, carrying out balancing by the final baseline components, and obtaining the coordinates of each monitoring point. The method is capable of weakening the influences of the multi-path effect, the GNSS monitoring precision is ensured, and the method is especially applicable to high building construction measurement.
Description
technical field [0001] The invention belongs to the technical field of engineering surveying, in particular to a GNSS data processing method capable of weakening multipath effects. Background technique [0002] At present, GNSS (Global Satellite Navigation and Positioning System) is widely used in the field of construction surveying due to its advantages of all-weather, all-time, continuity, high precision, and no need for vision. However, in some special environments, such as during the construction of high-rise buildings, the use of a large number of steel structure tower cranes, metal fences, and metal floor partitions has caused great interference to satellite signals, which will produce much more severe interference than other environments. path effect. This multipath effect is caused by reflective objects around the point, in other words, the multipath effect is closely related to the surrounding environment. Usually, the environment at each point is very different, ...
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IPC IPC(8): G01S19/22
CPCG01S19/22
Inventor 章迪郭际明梅文胜巢佰崇
Owner WUHAN UNIV