Convergence of daily mean coordinates of precise positioning methods

Kenigsberg, D V; Salamatina, Yu.M.; Prokhorov, O. A.; Кузиков, С. И.

doi:10.1088/1755-1315/929/1/012014

Cited by 2 publications

(3 citation statements)

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“…After that, only movements and errors relative to each other remain in the studied stations coordinates. In the local reference frame, the accuracy of coordinates relative to ITRF is lost, but their precision improves, so it is possible to recognize the reference displacements of stations relative to each other with absolute accuracy up to 1-2 mm [8,19].…”

Section: Analysis Of Positioning Resultsmentioning

confidence: 99%

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Comparison of Methods for Computing Highly Accurate Daily GNSS Positions

et al. 2023

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In Central Asia, the level of geodynamic displacements of the Earth's crust does not significantly exceed the accuracy of their measurement methods. Therefore, we need to choose the most accurate methods of calculating coordinates for cosmogeodetic stations. In this work, based on the data of 8 days of GPS measurements at 10 stations, 7 sets of average daily geocentric XYZ coordinates were calculated using different methods. To determine the positions, we used 3 calculation methods in the GAMIT/GLOBK program, 2 methods in the Bernese GNSS software, and 2 web services. To estimate the differences between 7 coordinate sets, we used parameters based on the Euclidean distance between these coordinate samples. The difference analysis of all pair combinations for 7 coordinate sets was carried out by 3D radius vectors, individual coordinate axes, and individual observation stations. The calculations showed that the positioning accuracy and precision depended not only on the coordinate calculation method but also on the selected reference frame. Methods using the international terrestrial reference frame (ITRF) provide station positions with regular deviations of <2 mm and individual deviations up to 5 cm. Methods using the regional and "point" reference frames have regular discrepancies for individual coordinates up to 2 cm and maximum deviations up to 1 m. Converting XYZ coordinates to UVW with the local reference frame reduces the difference between UVW sets by at least 25%. Due to the spatial orientation relative to the studied stations, the X (U) coordinate is reproduced 2-3 times with smaller deviations than other coordinates. The average deviation level of coordinate sets can be an indicator of the quality of conditions for receiving a GNSS signal at one station. We have identified the station group that has a coordinate deviation level several times lower than other stations. Doi: 10.28991/CEJ-2023-09-02-04 Full Text: PDF

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Section: Analysis Of Positioning Resultsmentioning

confidence: 99%

“…Such procedure for transformation of reference frame for coordinates of a station group is described in Ischuk et al [22]. The actual reduction in the level of coordinate variations reached 17% as a result of such coordinate transformation in Kenigsberg et al [19].…”

Section: Divergence For Uvw Coordinates In Local Reference Framementioning

confidence: 99%

Comparison of Methods for Computing Highly Accurate Daily GNSS Positions

et al. 2023

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“…Similarly, the rest of the UAVs can be moved to the target position. The rest of the drones can be adjusted by a similar method [21] so as to allow the drones to be evenly spread around the perimeter of the circle.…”

Section: Target Segmentation Methods For Repositioning Dronesmentioning

confidence: 99%

Unmanned aerial vehicle passive positioning technology based on cross-location and target splitting

Wang

Yang

et al. 2023

J. Phys.: Conf. Ser.

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In order to ensure that the UAV fleet can maintain maximum electromagnetic silence and minimise the emission of UAV electromagnetic signals during formation flight, a theoretical method of pure azimuth passive positioning can be used to optimise their relative positions. This paper analyses different formation situations of UAVs and presents the best solution for pure azimuth passive positioning of UAVs in formation flight and the corresponding positions. The paper first establishes polar coordinates based on known orientation information. It uses the sine theorem for triangles in the plane and the joint cubic equations to obtain the final result. It then uses triangulation to verify the accuracy of the specific location of the UAV by solving a least squares problem. Using the idea of cross-location, two intersecting trajectories are constructed and their intersection is used to improve the specific position of the UAV. Due to the bias in the position of the location of the signal sent by the UAV, this paper uses of the idea of target segmentation to split the target into multiple sub-targets and implement them separately. This is done in order to avoid the need for more UAVs to send their signal while adjusting the UAV position, making the Drones evenly spaced around a circumference.

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Convergence of daily mean coordinates of precise positioning methods

Cited by 2 publications

References 1 publication

Comparison of Methods for Computing Highly Accurate Daily GNSS Positions

Comparison of Methods for Computing Highly Accurate Daily GNSS Positions

Unmanned aerial vehicle passive positioning technology based on cross-location and target splitting

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