AIRBORNE SOIL-MOISTURE MEASUREMENT USING NATURAL TERRESTRIAL GAMMA-RADIATION
AIRBORNE SOIL-MOISTURE MEASUREMENT USING NATURAL TERRESTRIAL GAMMA-RADIATION
复制标题
DOI：
10.1097/00010694-198111000-00006
复制
发表时间：
1981-01-01
期刊：
影响因子：
--
通讯作者：
CARROLL, TR
中科院分区：
文献类型：
--
作者：
CARROLL, TR
天然陆地γ的测量土壤表面附近的辐射通量被用来推断区域土壤水分。空气传播的γ通过240条航线（每条航线约100公里）的网络收集辐射数据。6平方公里），并用于计算实时，面积土壤水分值。地面土壤湿度数据收集沿着校准飞行线路表明，空气中的土壤湿度值可以计算与土壤湿度的RMS误差为3.2%，这是40%小于地面土壤样品的平均标准偏差。利用3次主要背景调查数据计算的空气中土壤湿度值往往比地面采样的湿度值低1.5%。
Measurements of the natural terrestrial .gamma. radiation flux near the soil surface are used to infer areal soil moisture. Airborne .gamma. radiation data are collected over a network of 240 flight lines (each .apprx. 6 km2) in the upper Midwest (USA) and used to calculate real-time, areal soil moisture values. Ground-based soil moisture data collected along calibration flight lines indicate that airborne soil moisture values can be calculated with an RMS error of 3.2% soil moisture, which is 40% less than the mean standard deviation of the ground-based soil samples. The airborne soil moisture values calculated using data from 3 primary background surveys tend to be 1.5% less than the ground-sampled moisture values.