Premium
A new SuperDARN meteor wind measurement: Raw time series analysis method and its application to mesopause region dynamics
Author(s) -
Yukimatu Akira Sessai,
Tsutsumi Masaki
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015210
Subject(s) - mesopause , meteor (satellite) , radar , geology , diffusion , remote sensing , meteorology , geodesy , environmental science , mesosphere , atmospheric sciences , physics , stratosphere , computer science , telecommunications , thermodynamics
SuperDARN meteor wind measurements in the mesopause region using the standard analysis of ACFs constructed from the multi‐pulse sequence have several shortcomings. To overcome them, we have developed a new method to enable raw time series analysis without degrading normal SuperDARN ACF observations. The unevenly sampled raw time series is processed to detect only underdense meteor echoes to deduce line‐of‐sight neutral wind velocities and decay time constants. We installed this new code at the SENSU Syowa radar in Antarctica. Distributions of underdense meteor echoes show clear and expected dependency on distance from the radar, local time, and diffusion coefficient. By using diffusion coefficients as height information, we successfully obtained the structure of a downward phase propagating semi‐diurnal tide, which has not previously been achieved by analysing normal SuperDARN ACF data.