%0 Dataset
%T Heihe River Integrated Remote Sensing joint test: K & Ka band airborne microwave radiometer data set in Binggou River Basin flight area (March 30, 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/acc71e2e-8445-4a02-b71f-bfea92d2e989
%W NCDC
%R 10.12072/ncdc.NIEER.db1836.2022
%A Liang Ji
%A Wang shuguo
%A Chetao
%A Xiao qing
%K Airborne;ground remote sensing;microwave radiometer
%X This data set was acquired by K & Ka band airborne microwave radiometer on March 30, 2008 at Binggou flight area. The K-band frequency is 18.7ghz, zenith angle observation, no polarization information; Ka band frequency is 36.0ghz, scanning imaging, scanning range ± 12 °, vertical polarization observation. The plane took off from Zhangye airport at 12:43 (Beijing time, the same below) and landed at 15:44. 13: At the beginning of the 20th, we began to observe the ice trench photographing area. Because the air flow was too large and the flight stability could not be guaranteed, we only flew 11 routes and withdrew from the measuring area at 14:50. During the observation period, the flight altitude is about 5000m and the flight speed is about 220-250km / hr. The original data is divided into two parts: microwave radiometer data and GPS data. The K-band microwave radiometer belongs to non imaging observation, and the digital value obtained from instantaneous observation is recorded by text file. Ka band belongs to imaging observation. Different from L-band and K-band data, the original record of Ka band is a hexadecimal text file. During data processing, the hexadecimal file needs to be converted into decimal, so as to obtain 112 data uniformly collected within the scanning range of 24 degrees (the angle difference of each two data points is 24 / 112 = 0.214 degrees). GPS data records longitude and latitude during flight and aircraft attitude parameters. When using microwave radiometer observation data, it is necessary to convert the recorded digital value into bright temperature value according to the calibration coefficient (the calibration coefficient file is archived with the original observation data). At the same time, through the respective clock records of microwave radiometer and GPS, microwave observation can be connected with GPS record to match geographic coordinate information for microwave observation. When processing Ka band data, it is also necessary to c