Results 11 to 20 of about 109,915 (264)
GNSS algebraic structures [PDF]
Journal of Geodesy, 2011 The first objective of this paper is to show that some basic concepts used in global navigation satellite systems (GNSS) are similar to those introduced in Fourier synthesis for handling some phase calibration problems. In experimental astronomy, the latter are at the heart of what is called 'phase closure imaging.' In both cases, the analysis of the ...
André Lannes +2 more
openaire +6 more sources
An Approach to Improving GNSS Positioning Accuracy Using Several GNSS Devices [PDF]
Remote Sensing, 2021 Single point positioning (SPP) mode, related to pseudorange measurements, limits the level of accuracy to several meters in open sky and to several dozens of meters in urban canyons. This paper explores the effect of using a large number of SPP observations from low-cost global navigation system (GNSS) receivers, smartphones, and handheld GNSS units ...
María Jesús Jiménez-Martínez +2 more
openaire +4 more sources
Robust UAV Position and Attitude Estimation using Multiple GNSS Receivers for Laser-based 3D Mapping [PDF]
2019 IEEE/RSJ International Conference on Intelligent Robots and
Systems (IROS), Macau, China, 2019, pp. 4402-4408, 2023 Small-sized unmanned aerial vehicles (UAVs) have been widely investigated for use in a variety of applications such as remote sensing and aerial surveying. Direct three-dimensional (3D) mapping using a small-sized UAV equipped with a laser scanner is required for numerous remote sensing applications.
arxiv +1 more source
Precise orbit determination for BDS satellites
Satellite Navigation, 2022 Since the first pair of BeiDou satellites was deployed in 2000, China has made continuous efforts to establish its own independent BeiDou Navigation Satellite System (BDS) to provide the regional radio determination satellite service as well as regional ...
Qile Zhao +6 more
doaj +1 more source
GNSS-ISE: Instruction Set Extension for GNSS Baseband Processing [PDF]
Sensors, 2020 This work presents the results of research toward designing an instruction set extension dedicated to Global Navigation Satellite System (GNSS) baseband processing. The paper describes the state-of-the-art techniques of GNSS receiver implementation. Their advantages and disadvantages are discussed.
Krzysztof Marcinek, Witold A. Pleskacz
openaire +4 more sources
Calibration of GRACE on-board accelerometers for thermosphere density derivation
Geo-spatial Information Science, 2022 Low Earth Orbit satellite on-board accelerometers play an important role in improving our understanding of thermosphere density; however, the accelerometer-derived densities are subject to accelerometer calibration errors.
Min Li +5 more
doaj +1 more source
Use of supervised machine learning for GNSS signal spoofing detection with validation on real-world meaconing and spoofing data : part I [PDF]
, 2020 The vulnerability of the Global Navigation Satellite System (GNSS) open service signals to spoofing and meaconing poses a risk to the users of safety-of-life applications.
De Wilde, Wim +3 more
core +3 more sources
Satellite Navigation, 2021 An aided Inertial Navigation System (INS) is increasingly exploited in precise engineering surveying, such as railway track irregularity measurement, where a high relative measurement accuracy rather than absolute accuracy is emphasized.
Qijin Chen +3 more
doaj +1 more source
Remote Sensing, 2021 Aiming at the GNSS receiver vulnerability in challenging urban environments and low power consumption of integrated navigation systems, an improved robust adaptive Kalman filter (IRAKF) algorithm with real-time performance and low computation complexity ...
Peihui Yan +7 more
doaj +1 more source
Earth, Planets and Space, 2022 As part of the International GNSS Service (IGS) multi-GNSS Pilot Project (MGEX), precise orbit and clock products for multi-GNSS constellations have been submitted by several analysis centers (ACs) since 2012.
Guo Chen +5 more
doaj +1 more source