Results 91 to 100 of about 1,482 (190)
Geoarchaeology, Volume 40, Issue 3, May/June 2025.ABSTRACT Archaeological field research in South African archaeology has been dominated by rock shelters. While rock shelters provide the advantage of a defined area of investigation and more limited processes of erosion and sediment accumulation, they only capture part of the archaeological, environmental and landscape records.
Oliver Hatswell +7 more
wiley +1 more source
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
doaj +1 more source
Fast precise point positioning: a system to provide corrections for single and multi-frequency navigation [PDF]
, 2016 Fast Precise Point Positioning (Fast-PPP) provides Global Navigation Satellite System corrections in real-time. Satellite orbits and clock corrections are shown to be accurate to a few centimeters and a few tenths of a nanosecond which, together with ...
Bertran Albertí, Eduardo +4 more
core +2 more sources
A decentralized algorithm for generating PPP-RTK network products
, 2023 PPP-RTK, a synthesis of the well-known precise point positioning (PPP) and real-time kinematic (RTK) techniques, requires precise satellite-related products and atmospheric corrections estimated in a global navigation satellite system (GNSS) network. For generating these products, one commonly sends all network data to a computation center and conducts
Hou, P., Zhang, B.
openaire +2 more sources
Continuous Curvature Path Planning for Headland Coverage With Agricultural Robots
Journal of Field Robotics, Volume 42, Issue 3, Page 641-656, May 2025.ABSTRACT We introduce a methodology for headland coverage planning for autonomous agricultural robot systems, which is a complex problem often overlooked in agricultural robotics. At the corners of the headlands, a robot faces the risk to cross the border of a field while turning.
Gonzalo Mier +3 more
wiley +1 more source
LEO Augmentation in Large-Scale Ionosphere-Float PPP-RTK Positioning [PDF]
Precise point positioning-real-time kinematic (PPP-RTK) positioning combines the advantages of PPP and RTK, which enables the integer ambiguity resolution (IAR) without requiring a reference station nearby.
Cheng, F. +3 more
core +1 more source
Space Weather, Volume 23, Issue 2, February 2025.Abstract With the onset of solar activities of the 25th solar cycle, ionospheric perturbations have become increasingly frequent, posing significant challenges to various applications of Global Navigation Satellite Systems (GNSS). The Rate of Total Electron Content (TEC) Index (Rate of TEC Index (ROTI)), commonly derived from GNSS data sampled at 30‐s ...
Zhouyu Zhang +6 more
wiley +1 more source
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
doaj +1 more source
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
doaj +1 more source
Integració de les capacitats GNSS RTK i PPP-RTK en un node de baix consum amb connectivitat sense fil versàtil per a posicionament remot a nivell centimètric [PDF]
Aquest article presenta un projecte d'enginyeria que integra dues tècniques avançades de posicionament GNSS d'alta precisió-RTK i PPP-RTK-en un node integrat de baix consum dissenyat per a un desplegament fiable i a llarg termini en diversos escenaris ...
Subirà Pons, Marc +1 more
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