Results 11 to 20 of about 968,312 (333)

Integration of Smartphones Into Small Unmanned Aircraft Systems to Sense Water in Soil by Using Reflected GPS Signals

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
We investigate the feasibility of using built-in GNSS sensors within ubiquitous smartphone devices from a small UAS for the purpose of land remote sensing. We summarize the experimental findings and challenges that need to be resolved in order to perform
Mehmet Kurum   +2 more
doaj   +1 more source

Analysis of 5G and LTE Signals for Opportunistic Navigation and Time Holdover

open access: yesSensors, 2023
The purpose of this study was to evaluate the stability and therefore suitability of available fifth generation (5G) and long-term evolution (LTE) signals for positioning navigation and timing (PNT) purposes with particular focus on answering questions ...
Adrian Winter   +2 more
doaj   +1 more source

Assessing Repeatable Accuracy Potential of LoRa: A Navigation Approach

open access: yesIEEE Access, 2022
Two main classes of radio navigation systems are satellite and ground-based systems. Examples of such systems are eLoran deployed as a terrestrial system, and BeiDou, Galileo, GPS and Quasi-Zenith Satellite System (QZSS) deployed as satellite Navigation ...
Caspar K. Lebekwe   +3 more
doaj   +1 more source

Self-Organizing Multilateration of an Unknown Number of Transmitters

open access: yesIEEE Open Journal of Vehicular Technology, 2022
Wireless Sensor Networks (WSNs) that classify the source of detected radio signals require mobile transmitters, physical (PHY) and link layer meta data, and packet sniffing capabilities.
Kyle W. McClintick   +2 more
doaj   +1 more source

Parasitic Surveillance Potentialities Based on a GEO-SAR Illuminator

open access: yesRemote Sensing, 2021
Synthetic aperture radar systems operating with satellites in geosynchronous orbits (GEO-SAR) can provide a permanent coverage of wide specific areas of the Earth’s surface.
Fabrizio Santi   +4 more
doaj   +1 more source

The Potential of LEO Satellite-Based Opportunistic Navigation for High Dynamic Applications

open access: yesSensors, 2022
Resilient navigation in Global Navigation Satellite System (GNSS)-degraded and -denied environments is becoming more and more required for many applications. It can typically be based on multi-sensor data fusion that relies on alternative technologies to
Nabil Jardak, Quentin Jault
doaj   +1 more source

Phantom Car Attack Detection via Passive Opportunistic RF Localization

open access: yesIEEE Access, 2023
A novel opportunistic approach of passive RF localization is presented for detecting “phantom car” attacks, i.e., vehicles intentionally reporting false position/velocity information to surrounding vehicles and communication networks ...
Alexander M. Wyglinski   +9 more
doaj   +1 more source

scAI: an unsupervised approach for the integrative analysis of parallel single-cell transcriptomic and epigenomic profiles. [PDF]

open access: yes, 2020
Simultaneous measurements of transcriptomic and epigenomic profiles in the same individual cells provide an unprecedented opportunity to understand cell fates. However, effective approaches for the integrative analysis of such data are lacking.
Jin, Suoqin, Nie, Qing, Zhang, Lihua
core   +1 more source

Opportunistic In-Flight INS Alignment Using LEO Satellites and a Rotatory IMU Platform

open access: yesAerospace, 2021
With the emergence of numerous low Earth orbit (LEO) satellite constellations such as Iridium-Next, Globalstar, Orbcomm, Starlink, and OneWeb, the idea of considering their downlink signals as a source of pseudorange and pseudorange rate measurements has
Farzan Farhangian   +2 more
doaj   +1 more source

SCoBi Multilayer: A Signals of Opportunity Reflectometry Model for Multilayer Dielectric Reflections

open access: yesRemote Sensing, 2020
A multilayer module is incorporated into the Signals of Opportunity (SoOp) Coherent Bistatic Scattering model (SCoBi) for determining the reflections and propagation of electric fields within a series of multilayer dielectric slabs.
Dylan Boyd   +8 more
doaj   +1 more source

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