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A Study of Lunar Microwave Radiation Based on Satellite Observations
Remote Sensing ( IF 5 ) Pub Date : 2020-04-02 , DOI: 10.3390/rs12071129
Hu Yang , Martin Burgdorf

In recent years, the study of microwave radiation from the Moon’s surface has been of interest to the astronomy and remote sensing communities. Due to the stable geophysical properties of the Moon’s surface, microwave lunar radiation is highly predictable and can be accurately modeled, given sufficient observations from reliable instruments. Specifically, for microwave remote sensing study, if International System of Unit (SI) traceable observations of the Moon are available, the Moon can thus be used as an SI traceable calibration reference for microwave instruments to evaluate their calibration accuracies and assess their long-term calibration stabilities. Major challenges of using the Moon as a radiometric source standard for microwave sensors include the uncertainties in antenna pattern measurements, the reliability of measurements of brightness temperature (Tb) in the microwave spectrum of the lunar surface, and knowledge of the lunar phase lag because of penetration depths at different detection frequencies. Most microwave-sounding instruments can collect lunar radiation data from space-view observations during so-called lunar intrusion events that usually occur several days each month. Addressed in this work based on Moon observations from the Advanced Technology Microwave Sounder and the Advanced Microwave Sounding Unit/Microwave Humidity Sounder are two major issues in lunar calibration: the lunar surface microwave Tb spectrum and phase lag. The scientific objective of this study is to present our most recent progress on the study of lunar microwave radiation based on satellite observations. Reported here are the lunar microwave Tb spectrum and phase lag from 23 to 183 GHz based on observations of microwave-sounding instruments onboard different satellite platforms. For current Moon microwave radiation research, this study can help toward better understanding lunar microwave radiation features over a wide spectrum range, laying a solid foundation for future lunar microwave calibration efforts.

中文翻译:

基于卫星观测的月球微波辐射研究

近年来,对月球表面微波辐射的研究引起了天文学和遥感界的关注。由于月球表面具有稳定的地球物理特性,微波月球辐射具有很高的可预测性,并且可以通过可靠的仪器进行足够的观测来精确地模拟。具体来说,对于微波遥感研究,如果可以使用国际单位制(SI)跟踪月球的观测资料,那么就可以将月球用作微波仪器的SI溯源校准参考,以评估其校准精度并评估其长期性。校准稳定性。将月球用作微波传感器的辐射源标准的主要挑战包括天线方向图测量的不确定性,b)在月球表面的微波频谱中,并且由于在不同探测频率下的穿透深度,因此对月相滞后的了解。大多数微波探测仪器可以在所谓的月球入侵事件期间从太空观察中收集月球辐射数据,通常每月发生几天。在这项工作中,基于先进技术微波探测仪和先进微波探测仪/微波湿度探测仪对月球的观测结果是月球校准中的两个主要问题:月球表面微波T b频谱和相位滞后。这项研究的科学目的是介绍基于卫星观测的月球微波辐射研究的最新进展。这里报告的是月球微波T b根据不同卫星平台上的微波测深仪的观测,得出23至183 GHz的频谱和相位滞后。对于当前的月球微波辐射研究,该研究可以帮助您更好地了解宽光谱范围内的月球微波辐射特征,为将来的月球微波校准工作奠定坚实的基础。
更新日期:2020-04-03
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