Perspectives of Transmission and Traceability of Space Microwave Radiometric Benchmark
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摘要: 面向全球气候变化研究和高精度气象预报对空间微波辐射测量基准的迫切需求，由于传递链路复杂导致国际微波辐射基准尚未建立，为进一步提升遥感卫星观测精度和稳定性，建立空间辐射基准溯源评价体系，前瞻性地提出高精度可溯源的空间微波辐射基准传递顶层方案和技术解决方案，明确需要突破的微波辐射基准载荷关键技术，空间微波辐射基准传递与溯源理论、方法和模型，全链路微波辐射基准溯源传递一体化验证技术，微波系统全链路物理级基准传递和误差仿真评估技术等，为空间微波辐射测量提供统一参考基准，实现高精度、高稳定、可溯源的空间微波探测能力，提升中国空间微波辐射测量的核心竞争力。Abstract: Space microwave radiometric benchmarks are demanding for global climate change research and accurate weather forecasting. Given the complicated transfer chain, the microwave radiometric benchmarks have not yet been established. In order to improve the accuracy and stability of satellite remote sensing, this project proposes top-level designed technical solutions for precise and traceable space microwave radiation in a forward perspective. The calibration benchmark sensors enable the development of the theory, method, and model of space microwave radiometric benchmarks. The traceability of microwave radiometric benchmarks in the transfer chain is integrated and assessed. To establish the evaluation system for the traceability of space radiation, a physical transfer chain of microwave radiometric benchmarks is realized and the simulation errors of the microwave system are addressed. By providing a unified reference for space microwave radiation measurement, this project is expected to provide highly precise, highly stable, and traceable capability of space microwave sounding, and enhance the core competitiveness of China.
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Key words:
- Microwave radiation /
- Reference /
- Transfer /
- Traceability
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图 1 微波黑体发射率计量标准装置及其测试曲线
Figure 1. Microwave blackbody emissivity measurement standard device and its test curve
图 2 NIST 2018年报道的亮温传递建模计算场景
Figure 2. Brightness temperature transfer modeling calculation scenario reported by NIST in 2018
图 3 微波辐射基准传递溯源框架主要研究内容
Figure 3. Framework and main contents of microwave radiation reference transfer and traceability
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