Remote Sensing, Free Full-Text
Por um escritor misterioso
Last updated 17 julho 2024
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With the availability of low-cost, mass-market dual-frequency GNSS (Global Navigation Satellite System) receivers, standalone processing methods such as Precise Point Positioning (PPP) are no longer restricted to geodetic-grade GNSS equipment only. However, with cheaper equipment, data quality is expected to degrade. This same principle also affects low-cost GNSS antennas, which usually suffer from poorer multipath mitigation and higher antenna noise compared to their geodetic-grade counterparts. This work assesses the quality of a particular piece of low-cost GNSS equipment for real-time PPP and high-rate dynamic monitoring applications, such as strong-motion seismology. We assembled the u-blox ZED-F9P chip in a small and light-weight data logger. With observational data from static experiments—which are processed under kinematic conditions—we assess the precision and stability of the displacement estimates. We tested the impact of different multi-band antenna types, including geodetic medium-grade helical-type (JAVAD GrAnt-G3T), as well as a low-cost helical (Ardusimple AS-ANT2B-CAL) and a patch-type (u-blox ANN-MB) antenna. Besides static tests for the assessment of displacement precision, strong-motion dynamic ground movements are simulated with a robot arm. For cross-validation, we collected measurements with a JAVAD SIGMA G3T geodetic-grade receiver. In terms of precision, we cross-compare the results of three different dual-frequency, real-time PPP solutions: (1) an ambiguity-float solution using the Centre National d’Études Spatiales (CNES) open-source software, (2) an ambiguity-float and an AR (ambiguity-resolved) solution using the raPPPid software from TU Vienna, and (3) and a PPP-RTK solution using the u-blox PointPerfect positioning service. We show that, even with low-cost GNSS equipment, it is possible to obtain a precision of one centimeter. We conclude that these devices provide an excellent basis for the densification of existing GNSS monitoring networks, as needed for strong-motion seismology and earthquake-early-warning.
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Hyperspectral Remote Sensing Market Analysis Highlights the Impact of COVID-19 (2020-2024), Growing Adoption of UAVs to Boost the Market Growth, Technavio
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PDF) PRINCIPLES OF REMOTE SENSING by Shefali Aggarwal
Textbook Of Remote Sensing And Geographical Information Systems M Anji Reddy 3e 2008 Book : Free Download, Borrow, and Streaming : Internet Archive
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Introductory Digital Image Processing A Remote Sensing Perspective Pdf Download - Colaboratory
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Remote Sensing, Free Full-Text
Resonance, Journal of Science Education
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Remote Sensing and Image Interpretation Third Edition by Lillesand, Thomas M. & Kiefer, Ralph W.: Near Fine Soft Cover (1994) 3rd Edition.
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International Journal of Remote Sensing: Vol 44, No 24 (Current issue)
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Remote Sensing, Free Full-Text, JAXA Annual Forest Cover Maps for Vietnam during 2015–2018 Using ALOS-2/PALSAR…
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13 Free GIS Software Options: Map the World in Open Source - GIS Geography
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Remote Sensing Dictionary - Colaboratory
Remote Sensing Free Full Text Analysis Of Settlement Expansion And
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Cloud and snow detection of remote sensing images based on improved Unet3+
Remote sensing of the environment : an earth resource perspective : Jensen, John R., 1949- : Free Download, Borrow, and Streaming : Internet Archive
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Remote Sensing and Image Interpretation by Lillesand, Thomas
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