scholarly journals Cassini in situ observations of long-duration magnetic reconnection in Saturn’s magnetotail

2015 ◽  
Vol 12 (3) ◽  
pp. 268-271 ◽  
Author(s):  
C. S. Arridge ◽  
J. P. Eastwood ◽  
C. M. Jackman ◽  
G.-K. Poh ◽  
J. A. Slavin ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Long Duration ◽  
In Situ Observations

scholarly journals Overview of and first observations from the TILDAE High-Altitude Balloon Mission

2017 ◽  
Vol 10 (4) ◽  
pp. 1595-1607 ◽  
Author(s):  
Bennett A. Maruca ◽  
Raffaele Marino ◽  
David Sundkvist ◽  
Niharika H. Godbole ◽  
Stephane Constantin ◽  
...  
Keyword(s):  
Sonic Anemometer ◽  
Ambient Air ◽  
Small Scale ◽  
New Paradigm ◽  
Intermittent Turbulence ◽  
Atmospheric Measurements ◽  
Long Duration ◽  
In Situ Observations ◽  
Robust Separation

Abstract. Though the presence of intermittent turbulence in the stratosphere has been well established, much remains unknown about it. In situ observations of this phenomenon, which have provided the greatest details of it, have mostly been achieved via sounding balloons (i.e., small balloons which burst at peak altitude) carrying constant-temperature hot-wire anemometers (CTAs). The Turbulence and Intermittency Long-Duration Atmospheric Experiment (TILDAE) was developed to test a new paradigm for stratospheric observations. Rather than flying on a sounding balloon, TILDAE was incorporated as an add-on experiment to the payload of a NASA long-duration balloon mission that launched in January 2016 from McMurdo Station, Antarctica. Furthermore, TILDAE's key instrument was a sonic anemometer, which (relative to a CTA) provides better-calibrated measurements of wind velocity and a more robust separation of velocity components. During the balloon's ascent, TILDAE's sonic anemometer provided atmospheric measurements up to an altitude of about 18 km, beyond which the ambient air pressure was too low for the instrument to function properly. Efforts are currently underway to scientifically analyze these observations of small-scale fluctuations in the troposphere, tropopause, and stratosphere and to develop strategies for increasing the maximum operating altitude of the sonic anemometer.

scholarly journals Parker Solar Probe In Situ Observations of Magnetic Reconnection Exhausts during Encounter 1

2020 ◽  
Vol 246 (2) ◽  
pp. 34 ◽  
Author(s):  
T. D. Phan ◽  
S. D. Bale ◽  
J. P. Eastwood ◽  
B. Lavraud ◽  
J. F. Drake ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
In Situ Observations

scholarly journals Double Star, Cluster, and ground-based observations of magnetic reconnection during an interval of duskward oriented IMF: preliminary results

2005 ◽  
Vol 23 (8) ◽  
pp. 2903-2907 ◽  
Author(s):  
J. A. Wild ◽  
S. E. Milan ◽  
J. A. Davies ◽  
S. W. H. Cowley ◽  
C. M. Carr ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Northern Hemisphere ◽  
High Latitude ◽  
Double Star ◽  
Flux Tubes ◽  
Flux Transfer Events ◽  
Subsolar Point ◽  
Magnetic Flux Tubes ◽  
In Situ Observations

Abstract. We present a space- and ground-based study exploiting data from the coordinated Cluster and Double Star missions in order to investigate dayside magnetic reconnection under BY+ dominated IMF conditions. In-situ observations of magnetosheath flux transfer events combined with measurements of pulsed poleward and dawnward directed flows in the pre-noon sector high-latitude northern hemisphere ionosphere are interpreted as indications of pulsed magnetic reconnection during an interval in which the IMF remained relatively steady. Observations of newly-reconnected magnetic flux tubes anchored in the northern hemisphere both at mid-latitudes and in the vicinity of the subsolar point suggests that during BY+ dominated IMF, reconnection is not, as proposed previously, limited to the high-latitude magnetopause.

scholarly journals Empirical reconstruction and long-duration tracking of the magnetospheric boundary in single- and multi-spacecraft contexts

2005 ◽  
Vol 23 (4) ◽  
pp. 1355-1369 ◽  
Author(s):  
J. De Keyser ◽  
M. Roth ◽  
M. W. Dunlop ◽  
H. Rème ◽  
C. J. Owen ◽  
...  
Keyword(s):  
Measurement Errors ◽  
Moving Boundary ◽  
Reconstruction Technique ◽  
Long Duration ◽  
Magnetospheric Boundary ◽  
Novel Method ◽  
In Situ Observations ◽  
Using Data ◽  
The One

Abstract. The magnetospheric boundary is always moving, making it difficult to establish its structure. This paper presents a novel method for tracking the motion of the boundary, based on in-situ observations of the plasma velocity and of one or more additional observables. This method allows the moving boundary to be followed for extended periods of time (up to several hours) and aptly deals with limitations on the time resolution of the data, with measurement errors, and with occasional data gaps; it can exploit data from any number of spacecraft and any type of instrument. At the same time the method is an empirical reconstruction technique that determines the one-dimensional spatial structure of the boundary. The method is illustrated with single- and multi-spacecraft applications using data from Ampte/Irm and Cluster.

scholarly journals In situ observations of flux rope at the separatrix region of magnetic reconnection

2016 ◽  
Vol 121 (1) ◽  
pp. 205-213 ◽  
Author(s):  
S. Y. Huang ◽  
A. Retino ◽  
T. D. Phan ◽  
W. Daughton ◽  
A. Vaivads ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Flux Rope ◽  
In Situ Observations

In situ observations of multistage electron acceleration driven by magnetic reconnection

2015 ◽  
Vol 120 (8) ◽  
pp. 6320-6331 ◽  
Author(s):  
Mingyu Wu ◽  
Can Huang ◽  
Quanming Lu ◽  
Martin Volwerk ◽  
Rumi Nakamura ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Electron Acceleration ◽  
In Situ Observations

scholarly journals Overview of and First Observations from the TILDAE High-Altitude Balloon Mission

2017 ◽  
Author(s):  
Bennett A. Maruca ◽  
Raffaele Marino ◽  
David Sundkvist ◽  
Niharika H. Godbole ◽  
Stephane Constantin ◽  
...  
Keyword(s):  
Sonic Anemometer ◽  
Ambient Air ◽  
Small Scale ◽  
New Paradigm ◽  
Intermittent Turbulence ◽  
Atmospheric Measurements ◽  
Long Duration ◽  
In Situ Observations ◽  
Robust Separation

Abstract. Though the presence of intermittent turbulence in the stratosphere has been well established, much remains unknown about it. In-situ observations of this phenomenon, which have provided the greatest detail of it, have mostly been achieved via sounding balloons (i.e., small balloons which burst at peak altitude) carrying constant-temperature hot wire anemometers (CTA's). The Turbulence and Intermittency Long-Duration Atmospheric Experiment (TILDAE) was developed to test a new paradigm for stratospheric observations. Rather than flying on a sounding balloon, TILDAE was incorporated as an add-on experiment to the payload of a NASA long-duration balloon mission that launched in January, 2016 from McMurdo Station, Antarctica. Furthermore, TILDAE's key instrument was a sonic anemometer, which (relative to a CTA) provides better-calibrated measurements of wind velocity and a more-robust separation of velocity components. During the balloon's ascent, TILDAE's sonic anemometer provided atmospheric measurements up to an altitude of about 18 km, beyond which the ambient air pressure was too low for the instrument to function properly. Efforts are currently underway to scientifically analyze these observations of small-scale fluctuations in the troposphere, tropopause, and stratosphere and to develop strategies for increasing the maximum operating altitude of the sonic anemometer.

Sign in / Sign up

Export Citation Format

Share Document