Evaluation of X-Band Polarimetric-Radar Estimates of Drop-Size Distributions From Coincident S-Band Polarimetric Estimates and Measured Raindrop Spectra

被引：19

作者：

Anagnostou, Marios N. ^{[1
]}

Anagnostou, Emmanouil N. ^{[1
,2
]}

Vulpiani, Gianfranco ^{[3
]}

Montopoli, Mario ^{[4
]}

Marzano, Frank S. ^{[4
,5
,6
]}

Vivekanandan, Jothiram ^{[7
]}

机构：

[1] Hellen Ctr Marine Res, Inst Inland Waters, Anavissos 19013, Greece

[2] Univ Connecticut, Dept Civil & Environm Engn, Storrs, CT 06269 USA

[3] Italian Dept Civil Protect, I-00189 Rome, Italy

[4] Univ Aquila, Dept Elect Engn & Informat Engn, Ctr Excellence CETEMPS, I-67040 Laquila, Italy

[5] Univ Roma La Sapienza, Dept Elect Engn, I-00184 Rome, Italy

[6] Univ Roma La Sapienza, Ctr Excellence CETEMPS, I-00184 Rome, Italy

[7] Natl Ctr Atmospher Res, Boulder, CO 80303 USA

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2008年 / 46卷 / 10期

关键词：

Attenuation correction; drop-size distribution (DSD) retrievals; polarimetric radar; S-band radar; X-band radar;

D O I：

10.1109/TGRS.2008.2000757

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Recent research has demonstrated the value of polarimetric measurements for the correction of rain-path attenuation at X-band radar frequency and the estimation of rain parameters including drop-size distributions (DSD). The issue this paper is concerned with is to what degree uncertainties in attenuation correction can affect the estimation of DSD. Since attenuation-correction uncertainty enhances with rain path, our hypothesis is that DSD retrieval uncertainty at X-band may deteriorate with range. In this paper, we evaluate the relative accuracy of X-band DSD retrieval against DSD estimates from S-band radar observations and in situ disdrometer spectra. We present comparisons of various techniques for estimating DSD model parameters from attenuation-corrected X-band dual-polarization radar data. Coincident X-band polarimetric-radar (XPOL) and S-band polarimetric-radar dual-polarized radar measurements from the International H2O Project experiment as well as coincident XPOL (MP-X) measurements over disdrometer during a typhoon storm case in Japan are used to assess the accuracy of the different DSD retrieval algorithms applied to X-band radar measurements.

引用

页码：3067 / 3075

页数：9

共 46 条

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