Results 61 to 70 of about 146,803 (321)
Archaeological Prospection, EarlyView.ABSTRACT The Carnac alignments in Morbihan (France) are among the most famous Neolithic sites of the world. Paradoxically, they have benefited little from a thorough renewal of archaeological data over the past century. There are many reasons for this, but it is mainly because the site has been regarded more as a monument to visit and protect than as ...
Guillaume Bruniaux +6 more
wiley +1 more source
Real-Time Estimation of Low Earth Orbit (LEO) Satellite Clock Based on Ground Tracking Stations
Remote Sensing, 2020 The rapid movement of low Earth orbit (LEO) satellite can improve geometric diversity, which contributes to the rapid convergence of Global Navigation Satellite System (GNSS) precise point positioning (PPP). However, the LEO onboard receiver clock cannot
Zhixin Yang +7 more
doaj +1 more source
Assessment of Multi-Frequency PPP Ambiguity Resolution Using Galileo and BeiDou-3 Signals
Remote Sensing, 2021 From network RTK to PPP-RTK, it is highly expected that high-precision positioning within a few minutes can be achieved with a sparse reference network.
Jiang Guo +3 more
doaj +1 more source
Galileo and EGNOS as an asset for UTM safety and security [PDF]
, 2019 GAUSS (Galileo-EGNOS as an Asset for UTM Safety and Security) is a H2020 project1 that aims at designing and developing high performance positioning systems for drones within the U-Space framework focusing on UAS (Unmanned Aircraft System) VLL (Very Low ...
Andrade-Cetto, Juan +7 more
core
Archaeological Prospection, EarlyView.ABSTRACT In Upper Mesopotamia, the transition from the Pre‐Pottery Neolithic A (PPNA) to Pre‐Pottery Neolithic B (PPNB) period, ca. 10 800–10 600 cal. BP, is marked by a series of changes in chipped stone industries, architectural forms, symbolic objects, regional distribution of settlements and long‐distance exchange networks among others.
Toshihiro Tada +7 more
wiley +1 more source
GNSS Signal Authentication via Power and Distortion Monitoring [PDF]
, 2017 We propose a simple low-cost technique that enables civil Global Positioning System (GPS) receivers and other civil global navigation satellite system (GNSS) receivers to reliably detect carry-off spoofing and jamming.
Evans, Brian L. +3 more
core +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Rain‐induced erosion processes can severely damage Earthen archaeological sites. Huaca Chornancap (HCH; eighth–14th century ad) is a platform located in the Lambayeque region (Peru) exposed to seasonal rain due to El Niño Southern Oscillation (ENSO).
Luigi Magnini +5 more
wiley +1 more source
A temporal-domain solar radiation pressure model for BDS-3 MEO orbit prediction
Geo-spatial Information ScienceOrbit prediction (OP) for global navigation satellite system (GNSS) satellites is crucial for current location-based Internet of Things (IoT) applications.
Min Li +3 more
doaj +1 more source
Kinematic Measurement of the Railway Track Centerline Position by GNSS/INS/Odometer Integration
IEEE Access, 2019 Accurate absolute measurement of existing lines is a task of fundamental importance to provide scientific basis for reconstruction. Traditional railway track survey methods in combination with classical geodetic surveying apparatus such as total stations
Yukun Zhou, Qijin Chen, Xiaoji Niu
doaj +1 more source
Feasibility of precise navigation in high and low latitude regions under scintillation conditions [PDF]
, 2018 Scintillation is one of the most challenging problems in Global Navigation Satellite Systems (GNSS) navigation. This phenomenon appears when the radio signal passes through ionospheric irregularities.
Altadill, David +9 more
core +3 more sources