TY  - Data
T1  - Heihe River Integrated Remote Sensing joint test: ENVISAT ASAR ground synchronous observation data set of dense observation area in hydrological test area of arid area in the middle reaches of the pre-test period (September 19, 2007)
A1  - DaiLiyun
A1  - Chetao
A1  - Li xin
A1  - Han Xujun
A1  - Xiaohua Hao 
A1  - Jin rui
A1  - Li Hongyi
A1  - Liang Ji
A1  - PanXiaoduo
A1  - Ran youhua
A1  - Wang Xufeng
A1  - Liu qiang
DO  - 10.12072/ncdc.NIEER.db1813.2022
PY  - 2022
DA  - 2022-03-14
PB  - National Cryosphere Desert Data Center
AB  - During the pre-test on September 19, 2007, ENVISAT ASAR satellite ground synchronous observation test was carried out at Linze station, and an ENVISAT ASAR image was successfully obtained on September 19, 2007. ENVISAT ASAR data is AP mode, VV / VH polarization combination mode, and the transit time is about 11:29bjt. Local surface data can provide a basic ground data set for the development and verification of ENVISAT ASAR remote sensing inversion of soil moisture. Measurement content: 1. soil moisture. Quadrat distribution: Linze reed land, Zhangye farmland, Zhangye Gobi, Linze corn land, Linze alfalfa land, Zhangye Observatory and Linze wetland. Observation method: ring knife method. 2. GPS position, measuring instrument: Garmin GPS 76. 3. Vegetation information. Record information: plant height, plant fresh weight, plant dry weight, sampling method and description (e.g. surface type, uniformity, dry and wet degree, etc.). 4. Atmospheric parameters. Measuring instrument: CE318 solar spectrophotometer produced by French cimel company of Remote Sensing Institute. Measurement target: atmospheric parameters measured by solar spectrophotometer. Measuring location: Dawan water pipe station. Measurement content: CE318 solar spectrophotometer can inverse the optical thickness, Rayleigh scattering and aerosol optical thickness of non water vapor channel through the direct solar radiation measurement data. The water vapor content of atmospheric column can be obtained from the 936nm measurement data of water vapor channel, and the horizontal visibility can also be derived from CE318 data. CE318 of Beijing Normal University is used in this measurement, which can provide the optical thickness of five bands: 1020nm, 936nm, 870nm, 670nm and 440nm, and the water vapor content of the atmospheric column can be retrieved from the 936nm measurement data. Data storage: this data includes original data and processed atmospheric data. The original data is stored in CE318 unique file fo
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/69f6653f-df70-405b-8c4e-662042470bcf
ER  -