Results 31 to 40 of about 53,100 (266)

First results of a GNSS-R experiment from a stratospheric balloon over boreal forests [PDF]

open access: yes, 2015
The empirical results of a global navigation satellite systems reflectometry (GNSS-R) experiment onboard the Balloon EXperiments for University Students (BEXUS) 17 stratospheric balloon performed north of Sweden over boreal forests show that the power of
Camps Carmona, Adriano José   +3 more
core   +2 more sources

Space-Borne GNSS-R Ionospheric Delay Error Elimination by Optimal Spatial Filtering

open access: yesSensors, 2020
Global Navigation Satellite System Reflectometry (GNSS-R) technology is a new and promising remote sensing technology, especially satellite-based GNSS-R remote sensing, which has broad application prospects. In this work, the ionospheric impacts on space-
Qiuyang Zhang, Yang Liu, Junming Xia
doaj   +1 more source

SNR-Based GNSS-R for Coastal Sea-Level Altimetry

open access: yesGeosciences, 2021
Geodetic Global Navigation Satellite System reflectometry (GNSS-R) uses ground-based signals of opportunity to retrieve sea levels at an intermediate spatial scale.
Sajad Tabibi   +4 more
doaj   +1 more source

Electronic depth profiles with atomic layer resolution from resonant soft x-ray reflectivity

open access: yesNew Journal of Physics, 2015
The analysis of x-ray reflectivity data from artificial heterostructures usually relies on the homogeneity of optical properties of the constituent materials.
M Zwiebler   +10 more
doaj   +1 more source

Design and Characterization of the Multi-Band SWIR Receiver for the Lunar Flashlight CubeSat Mission

open access: yesRemote Sensing, 2019
Lunar Flashlight (LF) is an innovative National Aeronautics and Space Administration (NASA) CubeSat mission that is dedicated to quantifying and mapping the water ice harbored in the permanently shadowed craters of the lunar South Pole.
Quentin Vinckier   +6 more
doaj   +1 more source

From Self-Assembly of Colloidal Crystals toward Ordered Porous Layer Interferometry

open access: yesBiosensors, 2023
Interferometry-based, reflectometric, label-free biosensors have made significant progress in the analysis of molecular interactions after years of development.
Yi-Zhen Wan, Weiping Qian
doaj   +1 more source

Incoherent Optical Frequency-Domain Reflectometry Based on Homodyne Electro-Optic Downconversion for Fiber-Optic Sensor Interrogation

open access: yesSensors, 2019
Fiber-optics sensors using interrogation based on incoherent optical frequency-domain reflectometry (I-OFDR) offer benefits such as the high stability of interference in the radio-frequency (RF) domain and the high SNR due to narrowband RF detection. One
Juan Clement   +3 more
doaj   +1 more source

Advancing Reflectometry [PDF]

open access: yesEos, Transactions American Geophysical Union, 2013
Reflectometry, a microwave remote‐sensing technique to extract geophysical data from scattered satellite transmissions, was first demonstrated using Global Navigation Satellite System (GNSS) reflections. Recently, reflectometry has been extended to the reutilization of digital communication satellite signals for Earth remote sensing, now referred to as
James L. Garrison   +2 more
openaire   +1 more source

Monitoring contamination level on insulator materials under dry condition with a microwave reflectometer [PDF]

open access: yes, 2016
Current techniques used for monitoring the levels of contamination on high voltage insulators, such as leakage current and infrared, are not effective in dry conditions since they require the surface of the insulator to be wetted by fog, rain or snow. If
Jiang, Y.   +5 more
core   +1 more source

A Stable Biotin-Streptavidin Surface Enables Multiplex, Label-Free Protein Detection by Aptamer and Aptamer-Protein Arrays Using Arrayed Imaging Reflectometry

open access: yesSensors, 2020
While label-free multiplex sensor technology enables “mixing and matching” of different capture molecules in principle, in practice this has been rarely (if ever) demonstrated. To fill this gap, we developed protocols for the preparation of mixed aptamer-
Alanna M. Klose, Benjamin L. Miller
doaj   +1 more source

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