Soil Moisture Experiments (SMEX) 2002 Data Sets

The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) - is a mission instrument launched aboard NASA's Aqua Satellite on 4 May 2002. The Soil Moisture Experiments (SMEX) are designed to evaluate the accuracy of AMSR-E soil moisture data. Specific validation objectives include: assessing and refining soil moisture algorithm performance; verifying soil moisture estimation accuracy; investigating the effects of vegetation, surface temperature, topography, and soil texture on soil moisture accuracy; and determining the regions that are useful for AMSR-E soil moisture measurements.

The main elements of the Soil Moisture Experiments (SMEX) 2002 were to:

1. Study land-atmosphere interactions and extend remote sensing observations and algorithms to more challenging vegetation conditions than previously studied;
2. Validate AMSR-E satellite brightness temperature and soil moisture measurements; and
3. Evaluate new instrument technologies for soil moisture remote sensing.

The following SMEX02 data sets are available for AMSR-E Validation soil moisture experiments:

Ground Soil Moisture Data:
SMEX02 Soil Climate Analysis Network (SCAN) Station 2031, Ames, Iowa
SMEX02 Iowa Regional Ground Soil Moisture Data
SMEX02 Soil Moisture and Temperature Profiles, Walnut Creek, Iowa
SMEX02 Sliced Core Soil Moisture Data, Walnut Creek Watershed, Iowa
SMEX02 Watershed Soil Moisture Data, Walnut Creek, Iowa
SMEX02 Watershed Vitel Network Soil Moisture Data, Walnut Creek, Iowa

Aircraft Remote Sensing Data:
SMEX02 Passive and Active L and S band System (PALS) Data
SMEX02 Airborne GPS Bistatic Radar Data, Iowa
SMEX02 Aircraft Polarimetric Scanning Radiometer (PSR) Data
SMEX02 Airborne Synthetic Aperture Radar (AIRSAR) Data, Iowa
SMEX02 Electronically Steered Thinned Aperture Radiometer (ESTAR)

Satellite Remote Sensing Data:
SMEX02 Iowa Satellite Vegetation and Water Index (NDVI and NDWI) Data
SMEX02 AMSR-E Level-3 Daily Gridded Brightness Temperatures, Iowa
SMEX02 ASTER Level 1B Data, Iowa
SMEX02 European Remote Sensing Satellite 2 (ERS-2) AMI Data, Iowa
SMEX02 Landsat Thematic Mapper Imagery, Iowa
SMEX02 Landsat 5 and 7 Thematic Mapper Land Surface Brightness Temperatures
SMEX02 SSM/I Brightness Temperature Data, Iowa
SMEX02 QuickSCAT/SeaWinds Data

Vegetation Data:
SMEX02 Regional Vegetation Sampling Data, Iowa
SMEX02 Watershed Vegetation Sampling Data, Walnut Creek, Iowa
SMEX02 Vegetation Water Content, Iowa Regional and Walnut Creek Watershed

Meteorological Data:
SMEX02 Rain Gauge Network, Walnut Creek, Iowa
SMEX02 Atmospheric Aerosol Optical Properties Data
SMEX02 CODIAC Soil Climate Analysis Network (SCAN) Data, Iowa
SMEX02 Tower-Based Radiometric Surface Temperature, Walnut Creek, Iowa
SMEX02 Soil Moisture-Atmosphere Coupling Experiment (SMACEX) Walnut Creek, Iowa
SMEX02 Balloon-borne Radiosonde Data, Iowa

Ancillary Data:
SMEX02 Land Surface Information: Geolocation, Surface Roughness, and Photographs
SMEX02 Land Surface Information: Land Use Classification
SMEX02 Land Surface Information: Soils Database

高级微波扫描辐射计-地球观测系统（Advanced Microwave Scanning Radiometer - Earth Observing System，AMSR-E）是搭载于美国国家航空航天局（National Aeronautics and Space Administration，NASA）Aqua卫星的任务载荷，于2002年5月4日发射升空。土壤湿度实验（Soil Moisture Experiments，SMEX）旨在评估AMSR-E土壤湿度数据的精度。具体验证目标包括：评估并优化土壤湿度算法性能；验证土壤湿度估算精度；探究植被、地表温度、地形以及土壤质地对土壤湿度精度的影响；以及确定适用于AMSR-E土壤湿度测量的区域。

2002年土壤湿度实验（SMEX）的核心内容如下：
1. 研究陆气相互作用，将遥感观测与算法拓展至此前未涉及的更复杂植被覆盖场景；
2. 验证AMSR-E卫星亮温与土壤湿度测量结果；
3. 评估用于土壤湿度遥感的新型仪器技术。

以下为可用于AMSR-E验证土壤湿度实验的SMEX02数据集：

地面土壤湿度数据：
SMEX02 土壤气候分析网络（Soil Climate Analysis Network，SCAN）2031号站点（艾姆斯，艾奥瓦州）
SMEX02 艾奥瓦州区域地面土壤湿度数据
SMEX02 艾奥瓦州核桃溪地区土壤湿度与温度廓线数据
SMEX02 艾奥瓦州核桃溪流域岩芯切片土壤湿度数据
SMEX02 艾奥瓦州核桃溪流域土壤湿度数据
SMEX02 艾奥瓦州核桃溪流域Vitel网络土壤湿度数据

航空遥感数据：
SMEX02 主被动L/S波段系统（Passive and Active L and S band System，PALS）数据
SMEX02 艾奥瓦州机载GPS双基地雷达数据
SMEX02 机载极化扫描辐射计（Aircraft Polarimetric Scanning Radiometer，PSR）数据
SMEX02 艾奥瓦州机载合成孔径雷达（Airborne Synthetic Aperture Radar，AIRSAR）数据
SMEX02 电子扫描稀疏孔径辐射计（Electronically Steered Thinned Aperture Radiometer，ESTAR）数据

卫星遥感数据：
SMEX02 艾奥瓦州卫星植被与水指数（归一化植被指数NDVI、归一化水指数NDWI）数据
SMEX02 艾奥瓦州AMSR-E Level-3逐日网格化亮温数据
SMEX02 艾奥瓦州高级星载热发射与反射辐射计（ASTER）Level 1B数据
SMEX02 艾奥瓦州欧洲遥感卫星2号（ERS-2）AMI数据
SMEX02 艾奥瓦州陆地卫星专题制图仪（Landsat Thematic Mapper）影像数据
SMEX02 陆地卫星5号与7号专题制图仪地表亮温数据
SMEX02 艾奥瓦州专用扫描微波成像仪（Special Sensor Microwave/Imager，SSM/I）亮温数据
SMEX02 QuickSCAT/SeaWinds数据

植被数据：
SMEX02 艾奥瓦州区域植被采样数据
SMEX02 艾奥瓦州核桃溪流域植被采样数据
SMEX02 艾奥瓦州区域与核桃溪流域植被含水量数据

气象数据：
SMEX02 艾奥瓦州核桃溪地区雨量计网络数据
SMEX02 大气气溶胶光学特性数据
SMEX02 艾奥瓦州CODIAC土壤气候分析网络（SCAN）数据
SMEX02 艾奥瓦州核桃溪地区塔基辐射地表温度数据
SMEX02 艾奥瓦州核桃溪地区土壤湿度-大气耦合实验（Soil Moisture-Atmosphere Coupling Experiment，SMACEX）数据
SMEX02 艾奥瓦州气球探空仪数据

辅助数据：
SMEX02 地表信息：地理定位、地表粗糙度与影像资料
SMEX02 地表信息：土地利用分类数据
SMEX02 地表信息：土壤数据库