Results 61 to 70 of about 963 (157)
Accuracy Assessment of RTK, PPK, and PPP-AR Techniques for Direct Georeferencing in UAV-Based Photogrammetric Mapping [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information SciencesIn the fields of mapping, surveying, and three-dimensional (3D) modeling, unmanned aerial vehicle (UAV) systems have become essential equipment in recent times. UAVs are increasingly widely used, especially in the field of photogrammetry. The integration
M. Arkalı, M. E. Atik
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An Improved Long-Period Precise Time-Relative Positioning Method Based on RTS Data
Sensors, 2020 The high precision positioning can be easily achieved by using real-time kinematic (RTK) and precise point positioning (PPP) or their augmented techniques, such as network RTK (NRTK) and PPP-RTK, even if they also have their own shortfalls.
Yangwei Lu +5 more
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Influence of erosive drivers on the morphology of gullies in the Pampa biome, Southern Brazil
Earth Surface Processes and Landforms, Volume 50, Issue 12, 30 September 2025.The gullies in the pampa biome of Southern Brazil have different forms and intensity of erosion, despite being spatially close and sometimes this difference is observed within the same gully. The type of soil and rock material proved to be the determining factor in differentiating the shape of the gullies studied, with significant differences in the ...
Lucas Krein Rademann +2 more
wiley +1 more source
Optimizing PPP Performance by Incorporating ZWD Constraints Derived From Data Assimilation
Earth and Space Science, Volume 12, Issue 8, August 2025.Abstract One of the primary error sources limiting the performance of the Precise Point Positioning (PPP) technique is the atmospheric wet delay, caused by the presence of water vapor in the lower atmosphere. Accurately representing this parameter is crucial for improving the initialization and accuracy of satellite‐based positioning techniques ...
Masoud Dehvari +2 more
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Satellite NavigationWith the rapid development of technologies such as autonomous driving and robotic navigation, the demand for accurate and reliable positioning results with BDS has increased.
Weiguang GAO +5 more
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A Unified Model for BDS Wide Area and Local Area Augmentation Positioning Based on Raw Observations
Sensors, 2017 In this study, a unified model for BeiDou Navigation Satellite System (BDS) wide area and local area augmentation positioning based on raw observations has been proposed.
Rui Tu +5 more
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Geo-spatial Information SciencePrecise Point Positioning Real-Time Kinematic (PPP-RTK) represents a groundbreaking advancement in Global Navigation Satellite System (GNSS) positioning technology, enabling rapid centimeter-level accuracy without dependence on proximate reference ...
Hua Chen +7 more
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ISPRS International Journal of Geo-Information, 2017 Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the capability of precise point positioning (PPP) by improving the positioning accuracy and reducing the convergence time because more satellites will be available ...
Xidong Yu, Jingxiang Gao
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Remote SensingGlobal Navigation Satellite System (GNSS) signals experience delays when passing through the atmosphere due to the presence of free electrons in the ionosphere and air density in the non-ionized part of the atmosphere, known as the troposphere.
Paolo Dabove, Milad Bagheri
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