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	Sensor intercomparison of distributed surface radiation measurement system
	Dou, Baocheng ; Wen, Jianguang ; Li, Xiuhong ; Liu, Qiang ; Xiao, Qing ; Bai, Junhua ; Peng, Jingjing ; Lin, Xingwen ; Zhang, Zhigang ; Wu, Xiaodan ; Cai, Erli ; Zhang, Jialin ; Chang, Chongyan
	2015
关键词	intercomparison radiation measurement linear normalization quadratic polynomial normalization NETWORKS
英文摘要	The Wireless Sensor Networks of Coarse-resolution Pixel Parameters (CPP-WSN) was established to monitor the heterogeneity of coarse spatial resolution pixel, with consideration of different categories of land surface parameters in Huailai, Hebei province, China (40.349 degrees N, 115.785 degrees E). The observation network of radiation parameters (RadNet) in CPP-WSN was developed for multi-band radiation measurement and consisted of 6 nodes covering 2km*2km area to capture its heterogeneity. Each node employed four sensors to observe the five radiation parameters. The number and location of nodes in RadNet were determined through the representativeness-based sampling method. Thus, the RadNet is a distributed observation system with nodes work synchronously and measurements used together. The intercomparison experiment for RadNet is necessary and was conducted in Huailai Remote Sensing Station from 5th Aug to 10th Aug in 2012. Time series observations from various sensors were collected and analyzed. The maximum relative differences among sensors of UVR, SWR, LWR, PAR, and LST are 4.83%, 5.3%, 3.71%, 11%, and 0.54%, respectively. Sensor/parameter differences indeed exist and are considerable large for PAR, SWR, UVR, and LWR, which cannot be ignored. The linear normalization and quadratic polynomial normalization perform similar for CUV5/UVR, PQS1/PAR, CNR4/SWR, and SI-111/LST. As for CNR4/LWR, quadratic polynomial normalization show higher accuracy than linear normalization, especially in node2, node4, and node5. Thus, the LWR measured by CNR4 is proved to be nonlinear, and should be normalized with quadratic polynomial coefficients for higher precision.; EI; CPCI-S(ISTP); 9808
语种	英语
出处	INTERNATIONAL CONFERENCE ON INTELLIGENT EARTH OBSERVING AND APPLICATIONS 2015
DOI标识	10.1117/12.2207628
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/436945]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Dou, Baocheng,Wen, Jianguang,Li, Xiuhong,et al. Sensor intercomparison of distributed surface radiation measurement system. 2015-01-01.

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