First 10 Months of TGF Observations by ASIM

被引：76

作者：

Ostgaard, N. ^{[1
]}

Neubert, T. ^{[2
]}

Reglero, V ^{[3
]}

Ullaland, K. ^{[1
]}

Yang, S. ^{[1
]}

Genov, G. ^{[1
]}

Marisaldi, M. ^{[1
]}

Mezentsev, A. ^{[1
]}

Kochkin, P. ^{[1
]}

Lehtinen, N. ^{[1
]}

Sarria, D. ^{[1
]}

Qureshi, B. H. ^{[1
]}

Solberg, A. ^{[1
]}

Maiorana, C. ^{[1
]}

Albrechtsen, K. ^{[1
]}

Budtz-Jorgensen, C. ^{[2
]}

Kuvvetli, I ^{[2
]}

Christiansen, F. ^{[2
]}

Chanrion, O. ^{[2
]}

Heumesser, M. ^{[2
]}

Navarro-Gonzalez, J. ^{[3
]}

Connell, P. ^{[3
]}

Eyles, C. ^{[3
]}

Christian, H. ^{[4
]}

Al-nussirat, S. ^{[5
]}

机构：

[1] Univ Bergen, Birkeland Ctr Space Sci, Bergen, Norway

[2] Tech Univ Denmark, Natl Space Inst, Lyngby, Denmark

[3] Univ Valencia, Image Proc Lab, Valencia, Spain

[4] Univ Alabama, Dept Atmospher Sci, Huntsville, AL 35899 USA

[5] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2019年 / 124卷 / 24期

基金：

欧洲研究理事会;

关键词：

TGF; TLE; lightning; leaders; imaging; GAMMA-RAY FLASHES; ELECTRIC-FIELD; GROUND-LEVEL; MECHANISM; ALTITUDE;

D O I：

10.1029/2019JD031214

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

The Atmosphere-Space Interactions Monitor (ASIM) was launched to the International Space Station on 2 April 2018. The ASIM payload consists of two main instruments, the Modular X-ray and Gamma-ray Sensor (MXGS) for imaging and spectral analysis of Terrestrial Gamma-ray Flashes (TGFs) and the Modular Multi-spectral Imaging Array for detection, imaging, and spectral analysis of Transient Luminous Events and lightning. ASIM is the first space mission designed for simultaneous observations of Transient Luminous Events, TGFs, and optical lightning. During the first 10 months of operation (2 June 2018 to 1 April 2019) the MXGS has observed 217 TGFs. In this paper we report several unprecedented measurements and new scientific results obtained by ASIM during this period: (1) simultaneous TGF observations by Fermi Gamma-ray Burst Monitor and ASIM MXGS revealing the very good detection capability of ASIM MXGS and showing substructures in the TGF, (2) TGFs and Elves produced during the same lightning flash and even simultaneously have been observed, (3) first imaging of TGFs giving a unique source location, (4) strong statistical support for TGFs being produced during the upward propagation of a leader just before a large current pulse heats up the channel and emits a strong optical pulse, and (5) the t(50) duration of TGFs observed from space is shorter than previously reported.

引用

页码：14024 / 14036

页数：13

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