Open AccessArticle by Pan Lu 1,2,*, Teng Gao 1,2, Quanwang Chen 3 and Xiaohan Ren 4,* 1 Beijing Institute of Space Mechanics and Electricity, Beijing 100094, China 2 Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing, Beijing 100094, China 3 Shandong Institute for Product Quality Inspection, Jinan 250102, China 4 Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China * Authors to whom correspondence should be addressed.