First Incoherent Scatter Measurements and Adaptive Suppression of Field-Aligned Irregularities by the PANSY Radar at Syowa Station, Antarctic
| Autor: | Kaoru Sato, Taishi Hashimoto, Masaki Tsutsumi, Akinori Saito, Koji Nishimura, Toru Sato |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Incoherent scatter 020206 networking & telecommunications Ocean Engineering 02 engineering and technology Remote sensing 01 natural sciences law.invention Troposphere Remote sensing (archaeology) law Weather radar signal processing 0202 electrical engineering electronic engineering information engineering Antarctica Radars/Radar observations Radar Ionosphere Field aligned irregularities Geology Algorithms 0105 earth and related environmental sciences |
| Zdroj: | Journal of Atmospheric and Oceanic Technology = Journal of Atmospheric and Oceanic Technology. 36(9):1881-1888 |
| ISSN: | 0739-0572 |
| Popis: | The Program of the Antarctic Syowa Mesosphere–Stratosphere–Troposphere/Incoherent Scatter (PANSY) radar is a large atmospheric radar located at the Antarctic Syowa Station (69.01°S, 39.59°E). The PANSY radar performed the first incoherent scatter (IS) measurements in the Antarctic region in 2015. Several specific observations were undertaken in 2017 including a 24-h observation of the ionosphere using a peripheral antenna array to suppress interference from the field-aligned irregularities (FAIs). This paper presents the preliminary results derived from the IS measurements using the PANSY radar and the adaptive signal processing techniques to suppress FAIs. The norm-constrained and directionally constrained minimization of power (NC-DCMP) algorithm was applied to the 24-h ionosphere observations by the PANSY radar with a weighting applied to the directional constraint based on the gain differences of the subarrays. When compared with the conventional nonadaptive approach, the number of usable power profiles was increased by about 24% by the gain-weighted NC-DCMP algorithm, suggesting its effectiveness for FAI clutter suppression in ionosphere observations. Furthermore, detection of FAIs using the dedicated antenna array was found valuable in assessing the reliability of estimations of electron density based on VHF-band IS radar data. |
| Databáze: | OpenAIRE |
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