Results 31 to 40 of about 74,212 (211)
Estimation and evaluation of COSMIC radio occultation excess phase using undifferenced measurements [PDF]
Atmospheric Measurement Techniques, 2017 In the GPS radio occultation technique, the atmospheric excess phase (AEP) can be used to derive the refractivity, which is an important quantity in numerical weather prediction.
P. Xia, S. Ye, K. Jiang, D. Chen
doaj +1 more source
Autonomous GEO Satellite Navigation with Multiple GNSS Measurements [PDF]
, 2009 The poor satellite visibility and the weak signal power of the Global Positioning System (GPS) signal reception in side lobes are the main constraint on the Geostationary Earth Orbit (GEO) determination, however, the situation will improve when multi ...
Lim, S ; https://orcid.org/ +3 more
core +1 more source
The BeiDou Navigation Message [PDF]
, 2013 The article provides an overview of the BeiDou navigation message contents and highlights its specific communalities and differences with respect to other GNSS constellations. Making use of data collected by multi-GNSS monitoring stations of the MGEX and
Steigenberger, Peter +1 more
core +1 more source
Satellite Navigation, 2022 Precise Point Positioning (PPP) with Ambiguity Resolution (AR) is an important high-precision positioning technique that is gaining popularity in geodetic and geophysical applications. The implementation of PPP-AR requires precise products such as orbits,
Jianghui Geng +4 more
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Impacts of inter-satellite links on the ECOM model performance for BDS-3 MEO satellites
Satellite NavigationInter-satellite link (ISL) plays an essential role in current and future Global Navigation Satellite System (GNSS). In this study, we investigate the impact of ISL observations on precise orbit determination for BeiDou-3 Navigation Satellite System (BDS ...
Chao Yang +4 more
doaj +1 more source
Evaluation of Network RTK Positioning Performance Based on BDS-3 New Signal System
Remote Sensing, 2021 The BeiDou navigation satellite system (BDS-3) has been deployed and provides positioning, navigation, and timing (PNT) services for users all over the world.
Pengxu Wang +5 more
doaj +1 more source
Advanced Robotics Research, EarlyView.Autonomous field robots equipped with ISFET‐based sensors enable rapid, spatially resolved soil nutrient analysis directly in the field. An automated system based on the BoniRob platform is presented for standardized on‐site extraction and measurement of key macronutrients and soil pH.
Vadim Riedel +3 more
wiley +1 more source
Tropospheric Second-Order Horizontal Gradient Modeling for GNSS PPP
Remote Sensing, 2022 The asymmetric delay has a considerable impact on Global Navigation Satellite Systems (GNSS) Positioning, Navigation and Timing (PNT) applications. In GNSS analyses, the impacts of the asymmetric delay are commonly compensated by using the classical ...
Yaozong Zhou +5 more
doaj +1 more source
GNSS signal acquisition in the presence of sign transitions [PDF]
, 2009 The next generation of Global Navigation Satellite Systems (GNSS), such as Galileo [1] and GPS modernization [2], will use signals with equal code and bit periods, which will introduce a potential sign transition in each segment of the signal processed ...
Kewen Sun +3 more
core
Push the Limits: Human‐Like Multimodal Extreme Embodied Intelligence for Autonomous Racing
Advanced Robotics Research, EarlyView.Autonomous racing tests embodied intelligence under extreme control limits of speed, actuation, and decision‐making. Inspired by human multimodality, we present Apex, an embodied agent deployed on a super‐formula racing car at Yas Marina. Integrating physics‐informed perception, multimodal learning, and tasking, Apex cuts lap times by 15% and achieves ...
Yanxin Zhou +13 more
wiley +1 more source