| DOI: | 10.1002/jgrd.50466
|
| 论文题名: | Improvements to MISR stereo motion vectors |
| 作者: | Horváth A.
|
| 刊名: | Journal of Geophysical Research Atmospheres
|
| ISSN: | 21698996
|
| 出版年: | 2013
|
| 卷: | 118, 期:11 | | 起始页码: | 5600
|
| 结束页码: | 5620
|
| 语种: | 英语
|
| 英文关键词: | cloud motion wind
; Meteosat-9
; MISR
; stereo technique
; vortex street
|
| Scopus关键词: | Algorithms
; Error statistics
; Image compression
; Tropics
; Cloud motions
; Meteosat-9
; MISR
; Stereo techniques
; Vortex street
; Errors
; algorithm
; data set
; error analysis
; Meteosat
; MISR
; resolution
; stereo image
; vector
; vortex
|
| 英文摘要: | This study evaluated the effects of recent major modifications to the Multiangle Imaging SpectroRadiometer (MISR) wind retrieval algorithm by repeating an earlier yearlong comparison with Meteosat-9 cloud motion vectors. Algorithm upgrades included an area-based stereo matcher, enhanced quality control, georegistration corrections to focal plane distortions, and increased retrieval resolution. The new winds had better quality at all levels, yielding a particularly large increase in coverage at middle and high levels. The upgrades had an overall neutral impact on the E-W wind comparison statistics, which were already quite good in the preceding MISR data set. The comparison statistics for the more error-prone N-S wind, however, improved significantly on all scales - global, zonal, and regional - and throughout the entire atmosphere. Both the negative N-S wind bias and root mean square difference decreased, and correlation increased substantially, with middle and high levels, and tropics and subtropics experiencing the largest improvements. Subpixel georegistration corrections reduced cross-swath variations in N-S wind and height by half. As the net effect of these improvements, the error characteristics of the previously more uncertain N-S wind component became comparable to those of the E-W wind component at low and middle levels. Despite the substantial reductions in N-S wind errors, which are highly correlated with stereo height errors, the MISR - Meteosat-9 height comparison did not generally improve, strongly suggesting Meteosat-9 height assignment errors as the primary driver of discrepancy. © 2013. American Geophysical Union. All Rights Reserved. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/63688
|
| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Leibniz Institute for Tropospheric Research, Permoserstrasse 15, D-04318 Leipzig, Germany
|
| Recommended Citation: | |
Horváth A.. Improvements to MISR stereo motion vectors[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)
|
|
|