介绍了常规测温方法和三波段海面红外热成像测温方法的原理,采用这两种方法分别求解海面温度,对比分析了在不同观测方向和红外热像仪精度下两种方法的精度。结果表明:三波段海面红外热成像测温方法能消除海面发射率误差对精度的影响。当红外热像仪精度为±0.25 K时,测得海面温度的偏差基本小于0.5 K,精度较高。提高红外热像仪精度可有效提高三波段海面红外热成像测温方法的精度。当观测方向天顶角为70°~85°时,常规测温方法测得的海面温度偏差远高于三波段海面红外热成像测温方法,此时必须采用三波段海面红外热成像测温方法。

We introduce the principles of conventional temperature measurement method and three-band infrared thermal imaging temperature measurement method for sea surface, then solve sea surface temperature with these two methods, separately, and comparatively analyze the measuring accuracies of the two methods under different observation directions and infrared imager precisions. The results show that three-band infrared thermal imaging temperature measurement method for sea surface can eliminate the influence of the sea surface emissivity error on the temperature measurement accuracy. When the infrared imager precision is within ±0.25 K, the deviation of sea surface measured temperature is less than 0.5 K, basically, so its accuracy is relatively high. Improving the infrared imager precision can effectively improve the accuracy of three-band infrared thermal imaging temperature measurement method for sea surface. When the zenith angle of observation direction is in the range from 70° to 85°, the deviation of conventional temperature measurement method is much larger than that of three-band infrared thermal imaging temperature measurement method for sea surface, so we must use three-band infrared imaging temperature measurement method for sea surface in this case.