ASSESSING SATELLITE‐BASED AND AIRCRAFT‐BASED THERMAL INFRARED REMOTE SENSING FOR MONITORING PACIFIC NORTHWEST RIVER TEMPERATURE 1
ASSESSING SATELLITE‐BASED AND AIRCRAFT‐BASED THERMAL INFRARED REMOTE SENSING FOR MONITORING PACIFIC NORTHWEST RIVER TEMPERATURE 1
复制标题
评估用于监测西北太平洋河流温度的卫星和飞机热红外遥感技术 1
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Gillespie
中科院分区：
文献类型：
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作者：
K. Cherkauer;S. Burges;Rebecca N. Handcock;J. Kay;S. Kampf;A. Gillespie
影响太平洋西北地区本地鱼类健康的一个核心问题是水温。现场观测方法监测点温度，而热红外（TIR）遥感捕获空间变化。基于卫星的 TIR 传感器能够瞬间查看大片区域。选择了太平洋西北地区的四个河流河段来测试基于卫星和中等分辨率飞机的 TIR 遥感产品测量河流温度的能力。将分辨率为 5、15 和 90 米的图像与河内温度观测结果进行比较，以评估分辨率、范围宽度和传感器平台对沿河辐射温度的影响。在传感器可以解析河流河段的地方，所有传感器获得的水温在河流观测值的 ±2°C 范围内。还观察到沿流温度变化高达±5°C。相隔数小时拍摄的两组 TIR 图像之间的趋势相似，表明传感器正在观察河流表面的实际温度模式。如果传感器分辨率足以获得河段中完全解析的水像素，则可以观察到准确的温度和空间模式。然而，当前一代基于卫星的 TIR 传感器只能解决华盛顿所有被列为热受损区域的大约 6% 的问题。
One central issue affecting the health of native fish species in the Pacific Northwest is water temperature. In situ observation methods monitor point temperatures, while thermal infrared (TIR) remote sensing captures spatial variations. Satellite‐based TIR sensors have the ability to view large regions in an instant. Four Pacific Northwest river reaches were selected to test the ability of both satellite‐based and moderate resolution aircraft‐based TIR remote sensing products to measure river temperatures. Images with resolutions of 5, 15, and 90 meters were compared with instream temperature observations to assess how along stream radiant temperatures are affected by resolution, reach width, and sensor platform. Where the stream reach can be resolved by the sensor, all sensors obtain water temperatures within ±2°C of instream observations. Along stream temperature variations of up to ±5°C were also observed. Trends were similar between two sets of TIR images taken several hours apart, indicating that the sensors are observing actual temperature patterns from the river surface. If sensor resolution is sufficient to obtain fully resolved water pixels in the river reach, accurate temperatures and spatial patterns can be observed. The current generation of satellite‐based TIR sensors is, however, only able to resolve about 6 percent of all Washington reaches listed as thermally impaired.