%0 Dataset
%T Heihe River Integrated Remote Sensing joint experiment: ENVISAT ASAR ground synchronous observation data set in ARW encrypted observation area (March 12, 2008)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/65df78a6-6597-499c-b02c-8964b0789b3c
%W NCDC
%R 10.12072/ncdc.NIEER.db1739.2022
%A Gai Chunmei
%A Liang Ji
%A Ma mingguo
%A Shu Lele
%A Wang jianhua
%A Wang Xufeng
%A Jin rui
%K Aerospace remote sensing;soil;soil freezing depth;microwave remote sensing;surface radiation temperature;albedo;snow particle size;surface radiation characteristics;soil moisture
%X On March 12, 2008, the ground synchronous observation test of ENVISAT ASAR data was carried out in ajoufang 1, ajoufang 2 and ajoufang 3. ASAR data is AP mode, VV / VH polarization combination mode, and the transit time is about 11:29bjt. Due to the low temperature close to the river valley and the snow has not melted, the Airou sample 2 mainly carries out the synchronous observation test of snow parameters, while the snow of Airou sample 1 and Airou sample 3 has melted, and mainly carries out the synchronous observation test of soil freezing and thawing status and soil moisture. A rou sample 1, a rou sample 2 and a rou sample 3 are 4grid × 4grid, 30m per grid × 30m。 Ring knife soil sampling is only carried out at the center point of each grid, and other measurements are carried out at the center point and corner point of each grid. In a rou sample 1, the real and imaginary parts of soil temperature, soil volume water content, loss tangent, soil conductivity and soil complex dielectric constant were obtained by pogo portable soil moisture sensor; Ml2x soil moisture meter obtains soil volume water content; The PR2 soil profile moisture meter obtains 10cm, 20cm, 30cm, 40cm, 60cm and 100cm soil volume moisture content profiles; Needle thermometer to obtain 0-5cm average soil temperature; The soil is taken with a 100cm ^ 3 ring knife and dried to obtain the soil weight water content, soil bulk density and volume water content. Snow parameter observation synchronized with ASAR was carried out in arxo quadrat 2, including synchronous snow surface temperature observation during satellite transit (measured by thermal infrared temperature gun), layered snow layer temperature observation (measured by needle thermometer), snow particle size observation (measured by hand-held microscope), snow density observation (measured by aluminum box), And synchronous temperature measurement of snow surface and snow soil interface (measured by thermal infrared temperature gun); Snow spectr