安小六 汤旭光
摘要针对高校地理科学专业“遥感概论”课程的地物光谱反射率测定实验,在自然环境下受天气条件的限制,难以实时开展的问题,以美国ASD公司的HH2光谱仪为例,探索在模拟环境下,对地物光谱反射率进行测定,打破自然条件的约束,并引入“遥感概论”的实验课中。可以让学生了解模拟野外的环境测试地物光谱的必要性、可行性,使地物光谱反射率测定实验,不受自然条件限制,可以按照教学计划进度和大纲要求进行,满足实验教学和科研需要,同时也培养学生克服困难创造条件完成实验的学习品格。
关键词 地物光谱 模拟环境 测定实验 教学实践
中图分类号:P232文献标识码:ADOI:10.16400/j.cnki.kjdk.2021.26.011
Improved Practice in Measuring Spectral Reflectance of Ground Objects
AN Xiaoliu, TANG Xuguang
(School of Geographical Sciences, Southwest University, Chongqing 400715)
AbstractAiming at the problem that it is difficult to carry out the experiment of measuring spectral reflectance of objects in the course of "introduction to remote sensing" in colleges and universities, which is limited by the weather conditions in the natural environment, this paper takes the HH2 spectrometer of ASD company as an example, under the simulated environment, the spectral reflectance of ground objects is measured to break the constraints of natural conditions,and is introducedinto the experimentalcourseof"introductionto remote sensing" .Students canunderstand the necessity and feasibility of testing the spectral reflectance of ground objects in simulated field environment, so that the experimentofmeasuringspectralreflectanceofgroundobjectscanbecarriedoutaccordingtotheteachingschedule and outline without the restriction of natural conditions, to meet the needs of experimental teaching and scientific research, but also to train students to overcome difficulties to create conditions to complete the experiment of learning character.
Keywordsterrain spectrum; simulation environment; test experiment; teaching practice
“遥感概论”作为一门地理学的专业基础课程,实验教学在学科教育中占有1/3课程,教学内容包含地物光谱反射率测定、遥感图像的分类和图像判读、信息的提取等,地物光谱相关知识是遥感地学分析的基础,[1]地物光谱反射率测定是遥感课程中最基础的一个实验项目,高校的地理学科,应设置地物波谱反射率野外测定实验,我院的重庆市地理科学实验教学示范中心设有遥感实验室,购置有地物光谱仪设备,具有开设实验的硬件条件,但是地物光谱在本科的实验教学中多数学年完不成。
1地物光谱测试实验的难以完成原因
1.1野外测定自然条件求高
因野外地物光谱测量需要考虑各种光谱影响因素,自然环境条件要去特别高,具体如下:
云量限定:太阳周围90°立体角,淡积云量,无卷云、浓积云等,光照稳定。……