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"Infrared emission spectrum space radiation reference load technology" project started
On [China Instrument Network Instrument Development], the kick-off meeting for the "Infrared Emission Spectrum Space Radiation Reference Load Technology" project under the "13th Five-Year" National Key Research and Development Program on "Earth Observation and Navigation" was recently held at the Shanghai Institute of Technical Physics, Chinese Academy of Sciences. The event brought together researchers, scientists, and experts in remote sensing and satellite technology to discuss the future direction and implementation plan of this important initiative.
The project aims to address a critical need in climate change research, where satellites must detect temperature variations of less than 1K over a century. This requires the establishment of precise infrared radiation temperature measurement benchmarks. Currently, China lacks a standardized reference system for measuring temperatures from meteorological satellites. The project seeks to overcome this gap by developing advanced space-based blackbody radiation sources and calibration systems, ensuring accurate and traceable measurements that can be linked to international standards.
This key national program is divided into four main topics: hyperspectral infrared reference load technology, development of space infrared radiation reference sources and traceability techniques, data preprocessing and correction models for infrared reference loads, and space application technologies for these systems. Each component plays a vital role in building a comprehensive and reliable remote sensing calibration framework.
One of the key participants in the project is the China Institute of Metrology, which leads the topic on "Development of Space Infrared Radiation Reference Source and Traceability Technology." This section focuses on creating a high-precision, internationally traceable infrared emission source and establishing a calibration system that covers a wide temperature range—250 K to 330 K. The goal is to develop a reliable method for transferring bright temperature reference values, ensuring that all measurements are accurate and consistent.
At the kick-off meeting, Ding Lei, the project leader and researcher from the Shanghai Institute of Technology, presented the overall implementation strategy. He emphasized the importance of achieving high accuracy and stability in infrared hyperspectral measurements, as well as addressing challenges like interference suppression and spectral calibration.
Once completed, the project will significantly enhance the standardization of remote sensing radiation calibration in China. It will ensure that all satellite data can be traced back to the International System of Units (SI), providing core technological support for the country's autonomous radiometric calibration system. This advancement will play a crucial role in improving climate monitoring, land resource management, and environmental forecasting across the nation.
With an implementation period of four years, starting from May 2018, the project represents a major step forward in China’s efforts to build a nationwide, integrated remote sensing network. Its success will not only boost scientific research but also have significant political and strategic implications for the country’s long-term environmental and technological goals.