A SYSTEMATIC-ERROR IN MST ST RADAR WIND MEASUREMENT INDUCED BY A FINITE-RANGE VOLUME EFFECT .2. NUMERICAL CONSIDERATIONS

被引：7

作者：

FUKAO, S ^{[1
]}

INABA, M ^{[1
]}

KIMURA, I ^{[1
]}

MAY, PT ^{[1
]}

SATO, T ^{[1
]}

TSUDA, T ^{[1
]}

KATO, S ^{[1
]}

机构：

[1] KYOTO UNIV,DEPT ELECT ENGN,KYOTO 606,JAPAN

来源：

RADIO SCIENCE | 1988年 / 23卷 / 01期

关键词：

RADAR; -; Meteorological;

D O I：

10.1029/RS023i001p00074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A finite range volume effect causes a systematic error in MST/ST radar wind measurement when a thin turbulent layer is simultaneously located in several adjacent range volumes. This error appears as a false vertical shear of horizontal wind or as a false temporal wind variation at some ranges even if the ambient wind field is uniform with height and does not change at all. Because of this effect the observed Doppler power spectrum becomes asymmetric, and a noticeable error is induced in estimation of echo power, mean Doppler velocity, and spectral width. The present investigation shows that these errors are explained by a simple numerical model which is made to simulate an actual observational situation. The observed wind velocity is more reliable at ranges where the echo intensity is relatively larger compared with adjacent ranges. The finite range volume effect is negligibly small for weak ambient wind velocities less than approximately 10 ms** minus **1 and/or for an antenna beam width less than one degree.

引用

页码：74 / 82

页数：9

共 10 条

[1] THE MST RADAR TECHNIQUE - POTENTIAL FOR MIDDLE ATMOSPHERIC STUDIES [J].