摘要
根据美国航天局2002年10月进行的基于地表面反射GPS信号的遥感土壤湿度试验数据进行了土壤湿度反演。结果证明,反射GPS信号对土壤湿度特性十分敏感,湿度较大的水体区和农田区反射率较大,干旱区最小,不同植被覆盖对于反射率的影响不同,并对其进行了修正。反演得到的该地区土壤湿度值的分布规律也于10月份相对干旱的实际天气条件相吻合。这一结果证明了利用该技术反演土壤湿度的可行性。
The retrieval soil moisture was obtained using the data from the GPS surface reflection experiment carried out by NASA （National Aeronautics and Space Administration） in October 2002. Result proves that the reflected GPS signal is sensitive to the characteristics of soil moisture. GPS signals have been shown to be strongly reflected from water bodies and agricultural fields, and the weakest reflections take place in arid land. The reflectivity is corrected due to different reflections on various vegetation coverages. The distribution of retrieval soil moisture is coincident with the climatic condition of the study area during the dry mouth of October, which shows this technique is feasible for retrieval soil moisture.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2007年第5期94-96,共3页
Journal of Northeast Forestry University
基金
国家海洋"863"项目"基于卫星定位系统的海面风速与风向探测技术"(AA639190)
