DC Langmuir Probe for Measurement of Space Plasma: A Brief Review

Oyama, Koichiro

doi:10.5140/jass.2015.32.3.167

Cited by 26 publications

(20 citation statements)

References 82 publications

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“…In the nightside, the variation of T e at the higher altitudes and the deviation from the empirical model are even larger. Though the derivation of T e from the Langmuir probe is not straightforward because of the contamination problem [ Oyama , ], the large variation of T e at the topside ionosphere itself is an existent feature and this implies that T e can provide more informations than N e about the evolution history of the topside ionosphere in terms of plasma drift and heating or cooling processes by conduction or convective mixing.…”

Section: Discussion: Comparison With Ionospheric Modelsmentioning

confidence: 99%

Variation of the topside ionosphere during the last solar minimum period studied with multisatellite measurements of electron density and temperature

et al. 2016

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Using the ionospheric measurements of CHAMP, DEMETER, and DMSP F15, the seasonal and spatial variations of the topside ionosphere during the last solar minimum period were investigated and compared with ionospheric models. In all the satellite measurements, equatorial ionization anomaly (EIA) shows clearly longitudinal asymmetry with wave number −3 or −4 patterns. Anomalous increases of Ne in the nighttime surpassing daytime Ne, known as the Weddell Sea anomaly (WSA) or midlatitude summer nighttime anomaly (MSNA), were also observed in the global Ne distribution with differences in detailed geometry of the geomagnetic field according to the altitude. In the nighttime ionosphere, the reduced Te in the equatorial region at the DMSP altitude, identified as the equatorial plasma temperature anomaly (EPTA), was ascribed to the leftover of the prereversal enhancement of the upward plasma drift. Though the EIA, WSA, MSNA, and EPTA are all associated with the upward plasma movement, the difference in the thermal evolution is ascribable to the geometry of drift in which the plasma moves across the geomagnetic field line for the EIA and the EPTA, while along the field line for the WSA and the MSNA.

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Section: Discussion: Comparison With Ionospheric Modelsmentioning

confidence: 99%

Variation of the topside ionosphere during the last solar minimum period studied with multisatellite measurements of electron density and temperature

et al. 2016

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“…The plasma density, can also be derived from the faceplate (FP) on-board Swarm as part of the TII instrument. The FP, similarly to a planar Langmuir Probe (Oyama, 2015), measures the current with a cadence of 16 Hz. The electron density N e is derived from FP current measurements only for certain orbits per day, namely when the TII is not active.…”

Section: Baseline 05mentioning

confidence: 99%

Swarm Langmuir Probes' data quality and future improvements

Catapano¹,

Buchert

Qamili³

et al. 2021

Preprint

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Abstract. Swarm is ESA's (European Space Agency) first Earth observation constellation mission, which was launched in 2013 to study the geomagnetic field and its temporal evolution. Two Langmuir Probes (LPs) on board of each of the three Swarm satellites provide very accurate measurements of plasma parameters, which contribute to the the study of the ionospheric plasma dynamics. To maintain a high data quality for scientific and operational applications, the Swarm products are continuously monitored and validated via science-oriented diagnostics. This paper presents an overview of the data quality of the Swarm Langmuir Probes' measurements. The data quality is assessed by analysing short and long data segments, where the latter are selected sufficiently long to consider the impact of the solar activity. Langmuir Probes data have been validated through comparison with numerical models, other satellite missions, and ground observations. Based on the outcomes from quality control and validation activities conduced by ESA, as well as scientific analysis and feedback provided by the user community, the Swarm products are regularly upgraded. In this paper we discuss the data quality improvements introduced with the latest baseline, and how the data quality is influenced by the solar cycle. The main anomaly affecting the LP measurements is described, as well as possible improvements to be implemented in future baselines.

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“…To CSES LAP, we mainly use the up-sweeping phase to retrieve the plasma parameters (Yan, Guan, et al, 2018). The Writing -original draft: Rui Yan, Yibin Guan Writing -review & editing: Zeren Zhima, Chao Xiong, Xuhui Shen down-sweeping phase is commonly used to check whether the probe is contaminated or not, for the contamination has a more visible effect on the I-V curves during the down-sweeping phase (Oyama, 2015). To CSES LAP, The fixed bias-voltage phase is used for experiments or instrument performance tests.…”

Section: Satellite and Instrumentmentioning

confidence: 99%

The Regular Features Recorded by the Langmuir Probe Onboard the Low Earth Polar Orbit Satellite CSES

Yao

Guan

Miao³

et al. 2022

JGR Space Physics

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The Langmuir probe has been used as an effective tool for in-situ plasma parameter measurements since the past century (Bering et al., 1973;Mott-Smith & Langmuir, 1926;. In recent decades, it has been widely carried by many Low Earth Orbit (LEO) satellites, such as the Challenging Minisatellite Payload (CHAMP) (Cooke et al., 2003), the Detection of Electromagnetic Emissions Transmitted from Earthquake Regions (DEMETER) (Lebreton et al., 2006), the Swarm satellites (Alpha, Bravo, and Charlie) (Buchert et al., 2015), and the China Seismo-Electromagnetic Satellite (CSES) (Shen et al., 2018) whose Langmuir probe data is the subject of this paper.The Langmuir probe can provide the electron density (Ne), electron temperature (Te) and plasma potential (Vp) by collecting the plasma currents (I) after applying a specific range of bias voltage (V) to the probe (Chen & Chang, 2002;Lebreton et al., 2006;Mott-Smith & Langmuir, 1926). Ne and Te are two essential parameters for describing ionosphere physics, so their reliability and accuracy directly concern scientific research. However, due to the complicated space plasma environment and the limitations of the Langmuir probe detection methods, the adverse effects of probe contamination and interferences generated onboard the satellite always need to be carefully considered (

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DC Langmuir Probe for Measurement of Space Plasma: A Brief Review

Cited by 26 publications

References 82 publications

Variation of the topside ionosphere during the last solar minimum period studied with multisatellite measurements of electron density and temperature

Variation of the topside ionosphere during the last solar minimum period studied with multisatellite measurements of electron density and temperature

Swarm Langmuir Probes' data quality and future improvements

The Regular Features Recorded by the Langmuir Probe Onboard the Low Earth Polar Orbit Satellite CSES

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