Results 61 to 70 of about 739,624 (293)

Positioning with Chinese DTMB Signal under Complex Urban Environments [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
With the development of the Global Navigation Satellite System (GNSS), the GNSS can provide a wide-area positioning, navigation, and timing (PNT) service.
T. Zhou, L. Chen
doaj   +1 more source

On the Development of a Method for Updating an Empirical Climatological Ionospheric Model by Means of Assimilated vTEC Measurements From a GNSS Receiver Network

Space Weather, 2019
In this paper, a procedure for updating the International Reference Ionosphere (IRI) model by means of assimilated vertical total electron content (vTEC) measurements from a Global Navigational Satellite Systems (GNSS) receiver network is presented. This
A. Pignalberi, J. Habarulema, M. Pezzopane, R. Rizzi   +3 more
semanticscholar   +1 more source

Assessment of the performance of carrier-phase and Doppler smoothing code for low-cost GNSS receiver positioning

, 2020
With the wide civil applications of low-cost Global Navigation Satellite System (GNSS) receiver, precise positioning based on low-cost receiver attracted extensive attention.
Houxiang Zhou, Zishen Li, Cheng-Yueh Liu, Jiajia Xu, Shuhui Li, Kai Zhou   +5 more
semanticscholar   +1 more source

Cutting Through the Green: A Case for Grassland Archaeology Using UAV Multispectral Data

Archaeological Prospection, EarlyView.
ABSTRACT Advances in low‐altitude remote sensing are needed to improve the effectiveness of archaeological prospection in the Netherlands. The geomorphological situation and land use history make applying various remote sensing and geophysical technologies particularly challenging.
Roeland Emaus
wiley   +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, Barbosa, José, Blanch Llosa, Estefania, Camps Carmona, Adriano José, González Casado, Guillermo, Juan Zornoza, José Miguel, Orús Pérez, Raul, Riba Sagarra, Jaume, Rovira Garcia, Adrià, Sanz Subirana, Jaume   +9 more
core   +3 more sources

Software Defined GNSS Receiver

Procedia Engineering, 2015
AbstractThis paper describes the main ideas of a GNSS SDR receiver and its implementation. Aims of the development, advantages, and some specific details are discussed. Particular attention is paid to the issue of security in GNSS receivers used for special purposes and some strategies of tracking. The idea of a snapshot receiver is briefly mentioned.
Borre, Kai, Kudryavtsev, Ilya
openaire   +1 more source

The Layout and Size of an Early Pre‐Pottery Neolithic B Small Settlement Revealed by Geophysical Prospection at Harbetsuvan Tepesi in Southeastern Anatolia

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, Ryota Moriwaki, Kazuya Shimogama, Kenta Suzuki, Wataru Satake, Nurcan Küçükarslan, Celal Uludağ, Yoshihiro Nishiaki   +7 more
wiley   +1 more source

A Geomorphometric Approach to Estimate the Deterioration of Earthen Archaeological Sites by Rainfall and Diffusion Processes: The Huaca Chornancap (Eighth–14th Century ad), Lambayeque, Peru

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, Maria Ilaria Pannaccione Apa, Robert Gutiérrez Cachay, Marco Fernández Manayalle, Carlos Eduardo Wester La Torre, Guido Ventura   +5 more
wiley   +1 more source

SNR degradation in GNSS-R measurements under the effects of radio-frequency interference [PDF]

, 2016
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Alonso Arroyo, Alberto, Camps Carmona, Adriano José, Hyuk, Park, Onrubia Ibáñez, Raúl, Pascual Biosca, Daniel, Querol Borràs, Jorge   +5 more
core   +2 more sources

GNSS Jammer Localization and Identification With Airborne Commercial GNSS Receivers

IEEE Transactions on Information Forensics and Security
Global Navigation Satellite Systems (GNSS) are fundamental in ubiquitously providing position and time to a wide gamut of systems. Jamming remains a realistic threat in many deployment settings, civilian and tactical. Specifically, in Unmanned Aerial Vehicles (UAVs) sustained denial raises safety critical concerns.
Marco Spanghero, Filip Geib, Ronny Panier, Panos Papadimitratos   +3 more
openaire   +3 more sources