%0 Dataset
%T Heihe River eco hydrological remote sensing experiment: Airborne plmr ground synchronous observation data set of Yingke oasis and huazhaizi desert in the middle reaches of Heihe River Basin (June 28-29, 2012)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/5a699019-61d2-49ab-aef2-5f55f05ae10b
%W NCDC
%R 10.12072/ncdc.nieer.db3468.2023
%A Ma mingguo
%A Li xin
%K Ground Synchronous Observation;Ground Synchronous Observation;Soil Moisture;Airborne Microwave Radiometer
%X From June 28 to 29, 2012, airborne flight ground synchronous observation was carried out in Yingke oasis and huazhaizi desert plmr quadrat. 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 algorithm. Quadrat and sampling strategy: the observation area is located in the south edge of Zhangye Oasis anyangtan Desert Transition Zone, the west side of Zhang (Zhangye) - Da (Daman) highway, across the Longqu main canal from north to south, and is divided into two parts, 1 km in the southwest × For the 1km desert quadrat, because the desert is relatively homogeneous, the soil moisture of 5 points (1 point around and the center point. In the actual measurement process, several more points can be measured during walking along the road). The four corners are separated by 600m except the diagonal direction. The southwest corner is huazhaizi desert station, which is convenient for comparison with the data of meteorological station. On the northeast side, an area of 2.4 km was selected × Synchronous observation of oasis underlying surface is carried out according to the 2.4 km large-scale sample policy. The selection basis of quadrat is mainly to consider the representativeness of surface coverage, avoid residential houses and greenhouses as far as possible, cross oasis farmland and some deserts in the south, accessibility and observation (road consumption) time, so as to obtain the comparison with the brightness temperature observed by plmr