scholarly journals Foil chaff ejection systems for sounding rocket measurements of neutral winds in the mesopause region

2013 ◽  
pp. 41-46
Author(s):  
Yoshiko Koizumi-Kurihara ◽  
Junichi Kurihara ◽  
Yasuhiro Murayama ◽  
Koh-Ichiro Oyama
Keyword(s):  
Sounding Rocket ◽  
Mesopause Region ◽  
Neutral Winds ◽  
Rocket Measurements

Auroral electrodynamics---investigation by a dual sounding rocket experiment

2020 ◽  
Author(s):  
Hassanali Akbari ◽  
Robert Pfaff ◽  
Keyword(s):  
Electric Fields ◽  
Sounding Rocket ◽  
Sounding Rockets ◽  
Neutral Winds ◽  
Incoherent Scatter ◽  
Ac Electric Fields ◽  
Numerical Studies ◽  
Rocket Experiment ◽  
N Wave

<p>We present results from a 2017 sounding rocket experiment in which two NASA sounding rockets were simultaneously launched into the auroral ionosphere. The rockets included comprehensive instrumentation to measure DC and AC electric fields, magnetic fields, energetic particles, plasma density, and neutral winds, among other parameters, and achieved apogees of 190 and 330 km. This unprecedented collection of in-situ measurements obtained at two altitudes over an auroral arc, along with conjugate ground-based measurements by the Poker Flat incoherent scatter radar and all-sky cameras, enable us to investigate the behavior of an aurora arc and its associated electrodynamics. A prominent feature of our observations is the presence of localized, large-amplitude Alfvén wave structures observed in both the electric field and magnetometers at altitudes as low as 190 km in the vicinity of up- and down-ward current regions. The observations are discussed in the context of ionospheric feedback instability. The results are compared to predictions of previously published numerical studies and other sounding rocket observations.</p>

Simultaneous atomic and ion layer enhancements observed in the mesopause region over Arecibo during the Coqui II Sounding Rocket Campaign

2000 ◽  
Vol 27 (4) ◽  
pp. 449-452 ◽  
Author(s):  
J. S. Friedman ◽  
S. A. González ◽  
C. A. Tepley ◽  
Q. Zhou ◽  
M. P. Sulzer ◽  
...  
Keyword(s):  
Sounding Rocket ◽  
Mesopause Region

PMWE creation mechanism inferred from sounding rocket measurements

2021 ◽  
Author(s):  
Boris Strelnikov ◽  
Keyword(s):  
Electron Density ◽  
Current Knowledge ◽  
Sounding Rocket ◽  
Small Scale ◽  
Sounding Rockets ◽  
Smoke Particles ◽  
The North ◽  
Air Turbulence ◽  
Rocket Measurements

<p>A first sounding rocket campaign dedicated to investigate the creation mechanism of Polar Mesosphere Winter Echoes (PMWE) was conducted in April 2018 from the north Norwegian Andøya Space Center (69°N, 16°E). Two instrumented sounding rockets were launched on 13th and 18th of April under PMWE and no-PMWE conditions, respectively.</p><p>In this paper we give a brief summary of our current knowledge of PMWE and an overview of the PMWE sounding rocket mission. We describe and discuss some results of combined in situ and ground-based measurements which allow <span>to</span> <span>check</span> the existing PMWE theories.</p><p>Our measurements clearly show that the coherent structures in refractive index variations (forming PMWE) are accompanied by neutral air turbulence, which is reflected in small-scale structures (down to some meters) of neutral and electron density. We show that the behavior of the structures under investigation together with the atmospheric background is consistent with the interpretation, that PMWE were created by turbulence. Rocket measurements ultimately show that polar winter mesosphere is abounded with meteor smoke particles (MSP) and intermittent turbulent layers. Furthermore, it becomes clear that charged Meteor Smoke Particles (MSP) and background electron density can only enhance SNR, while turbulence is a prerequisite for their formation.</p>

A New Technique for Estimating the Lifetime of Bursts of Electron Precipitation From Sounding Rocket Measurements

2020 ◽  
Vol 47 (18) ◽  
Author(s):  
J. H. Hecht ◽  
J. H. Clemmons ◽  
M. R. Lessard ◽  
D. L. Kenward ◽  
F. B. Sadler ◽  
...  
Keyword(s):  
Electron Precipitation ◽  
New Technique ◽  
Sounding Rocket ◽  
A New Technique ◽  
Rocket Measurements

scholarly journals Correlations of mesospheric winds with subtle motion of the Arctic polar vortex

2010 ◽  
Vol 10 (2) ◽  
pp. 431-436 ◽  
Author(s):  
Y. Bhattacharya ◽  
A. J. Gerrard
Keyword(s):  
Michelson Interferometer ◽  
Polar Vortex ◽  
High Arctic ◽  
The Arctic ◽  
Stratospheric Polar Vortex ◽  
Mesopause Region ◽  
Neutral Winds ◽  
Wind Speeds ◽  
Initial Location ◽  
The Relationship

Abstract. This paper investigates the relationship between high latitude upper mesospheric winds and the state of the stratospheric polar vortex in the absence of major sudden stratospheric warmings. A ground based Michelson Interferometer stationed at Resolute Bay (74°43' N, 94°58' W) in the Canadian High Arctic is used to measure mesopause region neutral winds using the hydroxyl (OH) Meinel-band airglow emission (central altitude of ~85 km). These observed winds are compared to analysis winds in the upper stratosphere during November and December of 1995 and 1996; years characterized as cold, stable polar vortex periods. Correlation of mesopause wind speeds with those from the upper stratosphere is found to be significant for the 1996 season when the polar vortex is subtly displaced off its initial location by a strong Aleutian High. These mesopause winds are observed to lead stratospheric winds by approximately two days with increasing (decreasing) mesospheric winds predictive of decreasing (increasing) stratospheric winds. No statistically significant correlations are found for the 1995 season when there is no such displacement of the polar vortex.

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