scholarly journals Comments on “In Situ Atmospheric Turbulence Measurement Using the Terrestrial Magnetic Field—A Compass for a Radiosonde”

2007 ◽  
Vol 24 (8) ◽  
pp. 1519-1520 ◽  
Author(s):  
Ralph D. Lorenz
Keyword(s):  
Magnetic Field ◽  
Atmospheric Turbulence ◽  
Turbulence Measurement ◽  
Terrestrial Magnetic Field

In Situ Atmospheric Turbulence Measurement Using the Terrestrial Magnetic Field—A Compass for a Radiosonde

2006 ◽  
Vol 23 (3) ◽  
pp. 517-523 ◽  
Author(s):  
R. Giles Harrison ◽  
Robin J. Hogan
Keyword(s):  
Magnetic Field ◽  
Atmospheric Turbulence ◽  
Time Scale ◽  
Magnetic Field Measurement ◽  
Magnetic Fluctuations ◽  
Turbulence Measurement ◽  
Radar Measurements ◽  
In Situ Detection ◽  
Terrestrial Magnetic Field

Abstract A method for in situ detection of atmospheric turbulence has been developed using an inexpensive sensor carried within a conventional meteorological radiosonde. The sensor—a Hall effect magnetometer—was used to monitor the terrestrial magnetic field. Rapid time scale (10 s or less) fluctuations in the magnetic field measurement were related to the motion of the radiosonde, which was strongly influenced by atmospheric turbulence. Comparison with cloud radar measurements showed turbulence in regions where rapid time-scale magnetic fluctuations occurred. Reliable measurements were obtained between the surface and the stratosphere.

Tuning the Magnetic Alignment of Cellulose Nanocrystals from Perpendicular to Parallel Using Lepidocrocite Nanoparticles

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Sugam Kumar ◽  
Yulia Trushkina ◽  
Gergely Nagy ◽  
Christina Schütz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cellulose Nanocrystals ◽  
Small Angle Neutron Scattering ◽  
Lower Amount ◽  
Magnetic Alignment ◽  
Polarized Optical Microscopy ◽  
Parallel Orientation ◽  
Weak Magnetic Fields

The magnetic alignment of cellulose nanocrystals (CNC) and lepidocrocite nanorods (LpN), pristine and in hybrid suspensions has been investigated using contrast-matched small-angle neutron scattering (SANS) under in situ magnetic fields (0 – 6.8 T) and polarized optical microscopy. The pristine CNC (diamagnetic) and pristine LpN (paramagnetic) align perpendicular and parallel to the direction of field, respectively. The alignment of both the nanoparticles in their hybrid suspensions depends on the relative amount of the two components (CNC and LpN) and strength of the applied magnetic field. In the presence of 10 wt% LpN and fields < 1.0 T, the CNC align parallel to the field. In the hybrid containing lower amount of LpN (1 wt%), the ordering of CNC is partially frustrated in all range of magnetic field. At the same time, the LpN shows both perpendicular and parallel orientation, in the presence of CNC. This study highlights that the natural perpendicular ordering of CNC can be switched to parallel by weak magnetic fields and the incorporation of paramagnetic nanoparticle as LpN, as well it gives a method to influence the orientation of LpN.<br>

Aligned Packaging of in-situ Grown CsPbBr3 Nanorods within Polystyrene Nanofibers for Enhanced Polarized Luminescence Properties

2021 ◽  
Author(s):  
Hui Fu ◽  
Huilin Hou ◽  
Zhi Fang ◽  
Chaoyi Chen ◽  
Weiyou Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Luminescence Properties ◽  
Polarized Luminescence

In the present work, we report the strategy for aligned packaging of in-situ grown CsPbBr3 nanorods (NR) within polystyrene (PS) nanofibers (CsPbBr3 NR@PS) based on magnetic field assisted electrospinning for...

A magnetic field in situ measurement method of the heating film in atomic sen

2021 ◽  
pp. 1-1
Author(s):  
Xiaoyang Liang ◽  
Xinxiu Zhou ◽  
Die Hu ◽  
Wenfeng Wu ◽  
Yuchen Jia
Keyword(s):  
Magnetic Field ◽  
Measurement Method ◽  
In Situ Measurement

scholarly journals Titan's exosphere and its interaction with Saturn's magnetosphere

2008 ◽  
Vol 367 (1889) ◽  
pp. 743-752 ◽  
Author(s):  
Iannis Dandouras ◽  
Philippe Garnier ◽  
Donald G Mitchell ◽  
Edmond C Roelof ◽  
Pontus C Brandt ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Remote Sensing ◽  
Charge Exchange ◽  
Mass Spectrometer ◽  
Upper Atmosphere ◽  
Neutral Atoms ◽  
Energetic Ions ◽  
Imaging Instrument ◽  
Singly Charged

Titan's nitrogen-rich atmosphere is directly bombarded by energetic ions, due to its lack of a significant intrinsic magnetic field. Singly charged energetic ions from Saturn's magnetosphere undergo charge-exchange collisions with neutral atoms in Titan's upper atmosphere, or exosphere, being transformed into energetic neutral atoms (ENAs). The ion and neutral camera, one of the three sensors that comprise the magnetosphere imaging instrument (MIMI) on the Cassini/Huygens mission to Saturn and Titan, images these ENAs like photons, and measures their fluxes and energies. These remote-sensing measurements, combined with the in situ measurements performed in the upper thermosphere and in the exosphere by the ion and neutral mass spectrometer instrument, provide a powerful diagnostic of Titan's exosphere and its interaction with the Kronian magnetosphere. These observations are analysed and some of the exospheric features they reveal are modelled.

scholarly journals Description and Derived Climatologies of Automated In Situ Eddy-Dissipation-Rate Reports of Atmospheric Turbulence

2014 ◽  
Vol 53 (6) ◽  
pp. 1416-1432 ◽  
Author(s):  
R. D. Sharman ◽  
L. B. Cornman ◽  
G. Meymaris ◽  
J. Pearson ◽  
T. Farrar
Keyword(s):  
Atmospheric Turbulence ◽  
Dissipation Rate ◽  
Route Planning ◽  
Federal Aviation Administration ◽  
The United States ◽  
Commercial Aircraft ◽  
Upper Troposphere ◽  
Obvious Benefit ◽  
Turbulence Data

AbstractThe statistical properties of turbulence at upper levels in the atmosphere [upper troposphere and lower stratosphere (UTLS)] are still not well known, partly because of the lack of adequate routine observations. This is despite the obvious benefit that such observations would have for alerting aircraft of potentially hazardous conditions, either in real time or for route planning. To address this deficiency, a research project sponsored by the Federal Aviation Administration has developed a software package that automatically estimates and reports atmospheric turbulence intensity levels (as EDR ≡ ε1/3, where ε is the energy or eddy dissipation rate). The package has been tested and evaluated on commercial aircraft. The amount of turbulence data gathered from these in situ reports is unprecedented. As of January 2014, there are ~200 aircraft outfitted with this system, contributing to over 137 million archived records of EDR values through 2013, most of which were taken at cruise levels of commercial aircraft, that is, in the UTLS. In this paper, techniques used for estimating EDR are outlined and comparisons with pilot reports from the same or nearby aircraft are presented. These reports allow calibration of EDR in terms of traditionally reported intensity categories (“light,” “moderate,” or “severe”). The results of some statistical analyses of EDR values are also presented. These analyses are restricted to the United States for now, but, as this program is expanded to international carriers, such data will begin to become available over other areas of the globe.

Large-Eddy Simulations of realistic atmospheric turbulence with the DLR-TAU-code initialized by in situ airborne measurements

2012 ◽  
Vol 66 ◽  
pp. 121-129 ◽  
Author(s):  
Torsten Auerswald ◽  
Jens Bange ◽  
Tobias Knopp ◽  
Keith Weinman ◽  
Rolf Radespiel
Keyword(s):  
Atmospheric Turbulence ◽  
Large Eddy Simulations ◽  
Airborne Measurements ◽  
Large Eddy

Real-time estimation of atmospheric turbulence severity from in-situ aircraft measurements

1995 ◽  
Vol 32 (1) ◽  
pp. 171-177 ◽  
Author(s):  
Larry B. Cornman ◽  
Corinne S. Morse ◽  
Gary Cunning
Keyword(s):  
Real Time ◽  
Atmospheric Turbulence ◽  
Time Estimation ◽  
Aircraft Measurements ◽  
Real Time Estimation
Sign in / Sign up

Export Citation Format

Share Document