| 张秋晨1，龚佃利1，冯俊杰2.RPG-HATPRO-G3地基微波辐射计反演产品评估[J].海洋气象学报,2017,37(1):104-110 |
| RPG-HATPRO-G3地基微波辐射计反演产品评估 |
| Analysis and evaluation of retrieval products of RPG-HATPRO-G3 ground-based microwave radiometers |
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| DOI：10.19513/j.cnki.issn2096-3599.2017.01.012 |
| 中文关键词: 地基微波辐射计 反演产品 L波段探空 |
| 英文关键词: ground-based microwave radiometer retrieval product L-band radiosonde |
| 基金项目:山东省气象局重点科研项目（2012sdqxz07）；山东省气象局青年科研基金项目（2015SDQN16） |
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| 中文摘要: |
| RPG-HATPRO-G3地基微波辐射计采用“多通道并行测量技术”，性能稳定，反演精度高。应用该微波辐射计和常规L波段探空数据，比较了微波辐射计反演数据与探空测值的差异。结果表明：温度、水汽密度与常规探空资料比较有很好的线性相关性，对仪器维护后可以提高数据质量；相对湿度数据离散度较高。比较无降水时不同高度下微波辐射计反演数据的精度，温度在1 000 m以下低层平均误差和均方根误差较小；水汽密度的平均误差和均方根误差均为近地面较大，随高度而减小；相对湿度的平均误差和均方根误差都明显较大，温度和水汽密度的准确性高于相对湿度。降水时不同高度的温度、水汽密度和相对湿度的平均误差和均方根误差变化趋势均与无降水时相似，但是误差值明显偏大；降水时反演温度在2 000 m以下误差较小，水汽密度在3 000 m以下反演值较探空测值大，相对湿度在降水时的误差较大。 |
| 英文摘要: |
| A high speed parallel detection of all 14 channels is offered by RPG-HTAPRO-G3 ground-based microwave radiometer (short for RPG) with its two 7-channel-filterbank receivers. Analysis and evaluation of retrieval products of RPG microwave radiometer, such as temperature, water vapor density and relative humidity, are presented in this paper. The results show that there have better correlation and consistency between observations of RPG and radiosonde for temperature and water vapor density than for relative humidity. The quality of RPG observations can be improved by maintenance. By comparing the mean bias (MB) and root mean square error (RMSE) of retrieval products from RPG in different height on non-rainy days, it is revealed that temperature below 1 000 m is generally more accurate than in other heights. The value of MB and RMSE of water vapor density are higher close to the ground and decrease with height. Significant errors lie in RPG relative humidity observations, which is less accurate than those of temperature and water vapor density. On rainy days, the variation trends of MB and RMSE of temperature, water vapor density and relative humidity in different heights are similar to those in non-rainy days, but the values of MB and RMSE are larger. The MB and RMSE of temperature below 2 000 m are less than those in other heights. The MB of water vapor density below 3 000 m are positive, which means retrieval water vapor density are larger than those measured by radiosonde. MB and RMSE of relative humidity are higher than temperature and water vapor density obviously on rainy days as well. |
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