Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.248 IF 3.248
  • IF 5-year value: 3.650 IF 5-year 3.650
  • CiteScore value: 3.37 CiteScore 3.37
  • SNIP value: 1.253 SNIP 1.253
  • SJR value: 1.869 SJR 1.869
  • IPP value: 3.29 IPP 3.29
  • h5-index value: 47 h5-index 47
  • Scimago H index value: 60 Scimago H index 60
Discussion papers | Copyright
https://doi.org/10.5194/amt-2018-258
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 07 Aug 2018

Research article | 07 Aug 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Enhancing the spatio-temporal features of polar mesosphere summer echoes using coherent MIMO and radar imaging at MAARSY

Juan Miguel Urco1, Jorge Luis Chau1, Tobias Weber2, and Ralph Latteck1 Juan Miguel Urco et al.
  • 1Leibniz Institute of Atmospheric Physics at the University of Rostock, Germany
  • 2University of Rostock, Germany

Abstract. Polar mesospheric summer echoes (PMSEs) are very strong radar echoes caused by the presence of ice particles, turbulence, and free electrons in the mesosphere over polar regions. For more than three decades, PMSEs have been used as natural tracers of the complicated atmospheric dynamics of this region. Neutral winds and turbulence parameters have been obtained assuming PMSE horizontal homogeneity in scales of tens of kilometers. Recent radar imaging studies have shown that PMSEs are not homogeneous in these scales and instead they are composed of kilometer-scale structures. In this paper, we present a technique that allows PMSE observations with unprecedented angular resolution (~0.6°). The technique combines the concept of coherent MIMO (Multi-input multiple-output) and two high-resolution imaging techniques, i.e., Capon and Maximum Entropy (MaxEnt). The resulting resolution is evaluated by imaging specular meteor echoes. The gain in angular resolution compared to previous approaches using SIMO (single input and multiple-output) and Capon is at least a factor of 2, i.e., at 85km, we obtain a horizontal resolution of ~900 meters. The goodness of the new technique is evaluated with two events of three-dimensional PMSEs structures showing: (1) horizontal wavelengths of 8–10km and periods of 4–7 minutes, drifting with the background wind, and (2) horizontal wavelengths of 12–16km and periods of 15–20 minutes not drifting with the background wind. Besides the advantages of the implemented technique, we discuss its current challenges, like the use of reduced power-aperture and processing time, as well as the future opportunities for improving the understanding of the complex atmospheric dynamics behind PMSEs.

Juan Miguel Urco et al.
Interactive discussion
Status: open (until 27 Nov 2018)
Status: open (until 27 Nov 2018)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Juan Miguel Urco et al.
Video supplement

PMSE structures drifting with the wind J. Urco, J. Chau, T. Weber, and R. Latteck https://doi.org/10.5446/37505

PMSE structures not drifting with the wind J. Urco, J. Chau, T. Weber and R. Latteck https://doi.org/10.5446/37506

3D map: PMSE structures drifting with the wind J. Urco, T. Weber, and R. Latteck https://doi.org/10.5446/37507

3D map: PMSE structures not drifting with the wind J. Urco, J. Chau, T. Weber, and R. Latteck https://doi.org/10.5446/37508

Juan Miguel Urco et al.
Viewed
Total article views: 273 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
231 37 5 273 14 5 5
  • HTML: 231
  • PDF: 37
  • XML: 5
  • Total: 273
  • Supplement: 14
  • BibTeX: 5
  • EndNote: 5
Views and downloads (calculated since 07 Aug 2018)
Cumulative views and downloads (calculated since 07 Aug 2018)
Viewed (geographical distribution)
Total article views: 273 (including HTML, PDF, and XML) Thereof 270 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 16 Oct 2018
Publications Copernicus
Special issue
Download
Short summary
For decades, radar observations have been used to study the complicated atmospheric dynamics. Previous observations of the mesosphere, between 80–90 km altitude, over polar regions have been limited to a spatial resolution of few kilometers. In this work, we present a technique which allows 3D radar observations of the mesospheric dynamics with an unprecedented spatial resolution of ~ 900 meters. We combine the concept of MIMO and high-resolution algorithms to improve the spatial resolution.
For decades, radar observations have been used to study the complicated atmospheric dynamics....
Citation
Share