Development of an improved urban emissivity model based on sky view factor for retrieving effective emissivity and surface temperature over urban areas基于天空视图因子的改进城市发射率模型的开发,用于检索城市区域的有效发射率和表面温度ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSINGIF12.22016-12-0138OAAI