首页 >  2011, Vol. 15, Issue (4) : 687-695

摘要

全文摘要次数: 2994 全文下载次数: 24
引用本文:

DOI:

10.11834/jrs.20119350

收稿日期:

2010-02-01

修改日期:

2011-02-26

PDF Free   HTML   EndNote   BibTeX
基于CFD技术的微波定标源亮温评定方法
1.计量与校准技术国防科技重点实验室,北京 100854;2.北京无线电计量测试研究所, 北京 100854
摘要:

基于计算流体动力学仿真技术对微波定标源表面物理温度分布进行了仿真,解决了现有测温手段难以对小尺寸定标源尖劈进行高精度温度测量的问题,在此基础上建立了定标源等效输出物理温度的评定方法,并给出测温电阻埋设深度的建议值,从而有效减少测温电阻测量值与定标源等效表面物理温度值的差值,给出定标源输出亮温度不确定度小于0.5 K的合理评定结果,提高了微波辐射计定标系统的精度评估水平。

A method for evaluating the microwave blackbody’s equivalent brightness temperature by the Computational Fluid Dynamics simulation technologies
Abstract:

The microwave calibration target’s surface temperature is simulated using the computational fl uid dynamics simulation technologies, which overcomes the diffi culties of traditional methods in measuring the small wedge of calibration targets at a high precision. An evaluation method to calculate the calibration target’s equivalent output temperature is introduced and the reference depth value of embedding the temperature sensor is applied, which effi ciently reduces the difference between the sensor’s measurement value and the calibration target’s equivalent output temperature. The uncertainty of the calibration target’s brightness temperature can be reduced within 0.5 K, which highly increases the measurement evaluation precision of the radiometer’s calibration system.

本文暂时没有被引用!

欢迎关注学报微信

遥感学报交流群