COMPARISON OF SMOS-RETRIEVED AND NDVI CLIMATOLOGY-DERIVED VEGETATION OPTICAL THICKNESS

被引：0

作者：

Patton, Jason ^{[1
]}

Hornbuckle, Brian ^{[1
]}

机构：

[1] Iowa State Univ Sci & Technol, Dept Agron, Ames, IA 50011 USA

来源：

2014 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) | 2014年

关键词：

Microwave radiometry; SMOS; SMAP; vegetation water content; MICROWAVE EMISSION;

D O I：

10.1109/IGARSS.2014.6946994

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The Soil Moisture Active Passive (SMAP) mission may require ancillary vegetation optical thickness (tau) information as part of SMAP's soil moisture retrieval algorithm. Currently, the ancillary tau data comes from a normalized difference vegetation index (NDVI) climatology that is converted to tau. The Soil Moisture Ocean Salinity (SMOS) satellite measures tau as part of its soil moisture retrieval algorithm. In this paper, we compare SMOS tau to SMAP's proposed NDVI climatology-derived tau (SMAP tau). During the growing season in heavily cultivated parts of Iowa, SMAP tau is usually larger than SMOS tau. The timing of the peak in tau is similar between the two data sets on the whole, but some SMOS pixels in 2012 peak earlier by 15-20 days.

引用

页码：2554 / 2557

页数：4

共 18 条

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