A Merged Search‐Coil and Fluxgate Magnetometer Data Product for Parker Solar Probe FIELDS

Abstract. Fluxgate magnetometer data recorded at the dip-equator (Huancayo, Peru; 1.44°N, 355.9° in geomagnetic coordinates; 12.1°S, 75.2°W in geographic coordinates; L = 1.00) with higher accuracy of timing (0.1 s) and amplitude resolution (0.01 nT) were utilized to survey an onset of Pi 2 pulsations in the midnight sector (2100–0100 LT) during PROMIS (Polar Region and Outer Magnetosphere International Study) periods (1 March–20 June, 1986). It is found that changing field line magnitude and vector as observed by magnetometer on board the synchronous satellites in the midnight sector often takes place simultaneously with the onset of Pi 2 pulsations at the dip-equator. The field disturbances that follow thereafter tend to last for some time both at the geosynchronous altitudes and the dip-equator. In this report, we examine the initial response of the field lines in space, and attempt to classify how the field line vector changed in the meridional plane. Key words. Magnetospheric physics · Magnetospheric configuration and dynamics · MHD waves and instabilities · Plasmasphere

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Statistical survey of day-side magnetospheric current flow using Cluster observations: magnetopause

Annales Geophysicae ◽

10.5194/angeo-35-645-2017 ◽

2017 ◽

Vol 35 (3) ◽

pp. 645-657 ◽

Cited By ~ 2

Author(s):

Evelyn Liebert ◽

Christian Nabert ◽

Christopher Perschke ◽

Karl-Heinz Fornaçon ◽

Karl-Heinz Glassmeier

Keyword(s):

Solar Wind ◽

High Latitude ◽

Current Flow ◽

Fluxgate Magnetometer ◽

Current Direction ◽

Plasma Properties ◽

Close Vicinity ◽

Magnetometer Data ◽

Current Densities ◽

Statistical Survey

Abstract. We present a statistical survey of current structures observed by the Cluster spacecraft at high-latitude day-side magnetopause encounters in the close vicinity of the polar cusps. Making use of the curlometer technique and the fluxgate magnetometer data, we calculate the 3-D current densities and investigate the magnetopause current direction, location, and magnitude during varying solar wind conditions. We find that the orientation of the day-side current structures is in accordance with existing magnetopause current models. Based on the ambient plasma properties, we distinguish five different transition regions at the magnetopause surface and observe distinctive current properties for each region. Additionally, we find that the location of currents varies with respect to the onset of the changes in the plasma environment during magnetopause crossings.

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OGO 3 Search Coil Magnetometer data correlated with the reported crossing of the magnetopause at 6.6REby ATS 1

Journal of Geophysical Research Atmospheres ◽

10.1029/ja073i017p05769 ◽

1968 ◽

Vol 73 (17) ◽

pp. 5769-5775 ◽

Cited By ~ 12

Author(s):

Christopher T. Russell ◽

John V. Olson ◽

Robert E. Holzer ◽

Edward J. Smith

Keyword(s):

Search Coil ◽

Magnetometer Data

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Probabilistic resident space object detection using archival THEMIS fluxgate magnetometer data

Advances in Space Research ◽

10.1016/j.asr.2018.01.045 ◽

2018 ◽

Vol 61 (9) ◽

pp. 2301-2319 ◽

Cited By ~ 2

Author(s):

Julian Brew ◽

Marcus J. Holzinger

Keyword(s):

Object Detection ◽

Fluxgate Magnetometer ◽

Space Object ◽

Magnetometer Data

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Statistical survey of day-side magnetospheric current flow using Cluster observations: Bow shock

10.5194/angeo-2018-9 ◽

2018 ◽

Author(s):

Evelyn Liebert ◽

Christian Nabert ◽

Karl-Heinz Glassmeier

Keyword(s):

Current Flow ◽

Current System ◽

Bow Shock ◽

Fluxgate Magnetometer ◽

Good Accordance ◽

Magnetometer Data ◽

Current Densities ◽

Simulation Results ◽

Statistical Survey

Abstract. We present the first comprehensive statistical survey of the day-side terrestrial bow shock current system based on a large number of Cluster spacecraft bow shock crossings. Calculating the 3-D current densities using Fluxgate Magnetometer data and the Curlometer technique enables the investigation of current locations, directions and magnitudes in dependence on arbitrary IMF orientation. In case of quasi-perpendicular shock geometries we find that the current properties are in good accordance to theory and existing simulation results. However, currents at quasi-parallel shock geometries next to the foreshock region underlie distinct variations regarding their directions.

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Statistical survey of day-side magnetospheric current flow using Cluster observations: bow shock

Annales Geophysicae ◽

10.5194/angeo-36-1073-2018 ◽

2018 ◽

Vol 36 (4) ◽

pp. 1073-1080 ◽

Cited By ~ 2

Author(s):

Evelyn Liebert ◽

Christian Nabert ◽

Karl-Heinz Glassmeier

Keyword(s):

Current Flow ◽

Current System ◽

Bow Shock ◽

Fluxgate Magnetometer ◽

Good Accordance ◽

Magnetometer Data ◽

Current Densities ◽

Simulation Results ◽

Statistical Survey

Abstract. We present the first comprehensive statistical survey of the day-side terrestrial bow shock current system based on a large number of Cluster spacecraft bow shock crossings. Calculating the 3-D current densities using fluxgate magnetometer data and the curlometer technique enables the investigation of current locations, directions, and magnitudes in dependence on arbitrary IMF orientation. In case of quasi-perpendicular shock geometries we find that the current properties are in good accordance with theory and existing simulation results. However, currents at quasi-parallel shock geometries next to the foreshock region underlie distinct variations regarding their directions.

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Spectral structure of Pc3–4 pulsations: possible signatures of cavity modes

Annales Geophysicae ◽

10.5194/angeo-31-725-2013 ◽

2013 ◽

Vol 31 (4) ◽

pp. 725-743 ◽

Cited By ~ 8

Author(s):

P. R. Sutcliffe ◽

B. Heilig ◽

S. Lotz

Keyword(s):

Low Earth Orbit ◽

Fluxgate Magnetometer ◽

Spectral Structure ◽

Low Latitude ◽

Spectral Content ◽

Cavity Modes ◽

Line Resonance ◽

Magnetic Field Magnitude ◽

Magnetometer Data ◽

First Time

Abstract. In this study we investigate the spectral structure of Pc3–4 pulsations observed at low and midlatitudes. For this purpose, ground-based magnetometer data recorded at the MM100 stations in Europe and at two low latitude stations in South Africa were used. In addition, fluxgate magnetometer data from the CHAMP (CHAllenging Minisatellite Payload) low Earth orbit satellite were used. The results of our analysis suggest that at least three mechanisms contribute to the spectral content of Pc3–4 pulsations typically observed at these latitudes. We confirm that a typical Pc3–4 pulsation contains a field line resonance (FLR) contribution, with latitude dependent frequency, and an upstream wave (UW) contribution, with frequency proportional to the IMF (interplanetary magnetic field) magnitude BIMF. Besides the FLR and UW contributions, the Pc3–4 pulsations consistently contain signals at other frequencies that are independent of latitude and BIMF. We suggest that the most likely explanation for these additional frequency contributions is that they are fast mode resonances (FMRs) related to cavity, waveguide, or virtual modes. Although the above contributions to the pulsation spectral structure have been reported previously, we believe that this is the first time where evidence is presented showing that they are all present simultaneously in both ground-based and satellite data.

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