TY  - Data
T1  - Remote sensing experiment on ecological hydrology of Heihe River on August 1, 2012: plmr ground synchronous observation data set in the upper reaches of Heihe River Basin
A1  - Wang shuguo
A1  - Li xin
A1  - Ma mingguo
DO  - 10.12072/ncdc.nieer.db3525.2023
PY  - 2021
DA  - 2021-08-31
PB  - National Cryosphere Desert Data Center
AB  - On August 1, 2012, airborne plmr flight ground synchronous observation of transect and quadrat was carried out in the East branch and West Branch of the intensive observation area in the upper reaches of Heihe River. Plmr (polarimetric L-band multibeam radiometer) is a dual polarization (H / V) L-band microwave radiometer with center frequency of 1.413 GHz, bandwidth of 24 MHz, resolution of 1 km (relative altitude of 3 km), simultaneous observation of 6 beams, incident angle of ± 7 º, ± 21.5 º, ± 38.5 º, sensitivity & lt; 1K。 The flight mainly covers the ecological and hydrological test area of artificial oasis in the middle reaches The local surface synchronous data set can provide a basic ground data set for the development and verification of passive microwave remote sensing soil moisture retrieval algorithmQuadrat and sampling strategy: the observation area covers a large area. Therefore, one transect is used for observation in the East branch and West Branch of Babao River, with an interval of 50 m. considering the long distance in sampling, in order to ensure synchronization with flight observation as much as possible, observation is carried out at a certain distance. Two quadrats, 1.5 km in length, are set in Arao grassland × 0.6 km and 0.85 km × 0.6 km. On these two quadrats, the sampling points are 100 m from north to South and 50 m from east to west.Four hydroprobe data acquisition systems (HDAS, ref. 2) and three pogo portable soil sensors were used for simultaneous measurement Measurement contents: soil temperature, soil moisture (volume water content), loss tangent, soil conductivity, real and imaginary parts of soil complex dielectric are observed and obtained. Vegetation parameter observation was carried out at some representative soil moisture sampling points, and the measurements of coverage, plant height and biomass (vegetation moisture content) were completed Data: this data set includes two parts: soil moisture observation and vegetation observa
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/1cbf226e-ebef-4162-8192-bdc44abc9d84
ER  -