%0 Dataset
%T Heihe River Integrated Remote Sensing joint experiment: surface roughness observation data set of Linze grassland intensive observation area (June 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/5c58420f-99d4-4971-8a36-81b59b605cf5
%W NCDC
%R 10.12072/ncdc.NIEER.db1889.2022
%A HuXiaoli
%A Gai Chunmei
%A Wang shuguo
%A Wang Xufeng
%K Surface roughness;surface height;standard deviation
%X The surface roughness of different underlying surfaces was measured in the intensive observation area of Linze grassland on June 7, 2008, June 18, 2008 and June 25, 2008. The data can provide data for microwave inversion and verification of soil moisture from airborne satellite remote sensing data. This data includes the original photos of roughness measurement of sampling points in sample a (reed land), sample B (saline alkali land) and sample C (saline alkali land) of Linze grassland station, and the calculation results of surface height standard deviation (CM) and surface correlation length (CM). Each sampling point is measured once in north-south direction and east-west direction respectively. The roughness plate is 110cm long and the distance between measurement points is 1cm. All sides of grassland station are 4grid × 4gid, 120m long × 120m wide square. This data can provide a basic ground data set for the development and verification of microwave remote sensing algorithms. The roughness data is measured by the roughness board and collected by digital photography. Then, under the ArcView software, the top of each spoke in the photo and the four corners of the board are manually digitally sampled to obtain its image coordinate value. After geometric correction, the height of each spoke is calculated, and then the surface height standard deviation and surface related length are calculated according to the formula. The calculation formula is shown in pages 234-236, Volume II, microwave remote sensing This data is handled by Cao yongpan. See metadata "Heihe integrated remote sensing joint experiment: layout of quadrat transects in Linze grassland densified observation area" for the distribution information of quadrat transects. In the roughness data, the first is the sample name, and then the data body includes 4 columns (number, file name, standard deviation and correlation length). Each file name, i.e. TXT file, corresponds to a sampling photo, and the standard