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利用可见一近红外多光谱扫描图象和热红外日、夜扫描图象可以生成土壤反照率图和土壤日夜温差图,再利用室內测定的少量土壤热惯量资料对室外同步测定的土壤反照率和日夜温差进行二元回归,可得二元回归方程。借助此回归方程和所生成的土壤反照率图和土壤温差图可以生成真实土壤热惯量图。再利用土壤热惯量对土壤水分的回归方程,可将真实土壤热惯量图变成土壤水分图。这种土壤水分图反映出的土壤水分含量误差范围为-4.18%至1.98%,误差绝对值平均数为1.84%。
The soil albedo map and soil temperature and night temperature difference map can be generated by visible-near-infrared multi-spectral scanning image and thermal infrared day and night scanning image. Binary regression of temperature difference between day and night, available binary regression equation. With this regression equation and the generated soil albedo and soil temperature difference plots, a realistic soil thermal inertia map can be generated. Reuse the soil thermal inertia of soil moisture regression equation, the real soil thermal inertia map into soil moisture map. This soil moisture map reflects the soil moisture content error range of -4.18% to 1.98%, the absolute value of the error is 1.84%.