Thematic datasets for the Tibetan Plateau from Tiangong-2 wide-band imaging spectrometer

The Tibetan Plateau is known as the ridge of the world , the water tower of Asia, and the third pole of the earth. The Pan-Third Pole region, which extends from the third pole westwards to cover an area of about 20 million km2, constitutes the core area of the “Belt and Road”. The ongoing second comprehensive scientific investigation of the Tibetan Plateau intends to reveal the mechanism of environmental changes and optimize the ecological security barrier system in the Tibetan Plateau. It plays an important role in promoting the sustainable development of the Tibetan Plateau, the construction of national ecological civilization and the protection of global ecological environment. The launch of the Tiangong-2 wide-band imager in September 2016 has enabled a continuous observation of the Tibetan Plateau, which generated a large number of multi-temporal and multi-spectral remote sensing data. On this basis, we built the thematic datasets for the Tibetan Plateau based on a series of data processing and quality control measures, including radiation correction, geometric correction, and quantitative inversion. The datasets were then distributed and shared through the space application data promoting service platform for China Manned Space Engineering (http://www.msadc.cn). The datasets include high-quality image data, surface reflectance products and surface temperature products for the Tibetan Plateau acquired by the Tiangong-2 wide-band imaging spectrometer since its launch. It provides rich data for studies of land resources, lake hydrology, ecological environment and biodiversity, climate change, and glacial changes of this region.

青藏高原被誉为世界屋脊、亚洲水塔以及地球第三极，其广阔的泛第三极区域，自第三极向西延伸，覆盖约两千百万平方公里，构成了“一带一路”的核心地带。当前对青藏高原进行的第二次全面科学考察旨在揭示环境变化的机制，并优化青藏高原的生态安全屏障系统。此考察在促进青藏高原的可持续发展、国家生态文明建设和全球生态环境保护中扮演着至关重要的角色。2016年9月天宫二号宽带成像仪的发射，实现了对青藏高原的持续观测，并由此产生了大量多时相、多光谱的遥感数据。在此基础上，我们通过一系列的数据处理和质量控制措施，包括辐射校正、几何校正和定量反演，构建了青藏高原的主题数据集。这些数据集随后通过中国载人航天工程空间应用数据促进服务平台（http://www.msadc.cn）进行分发和共享。数据集包括自天宫二号宽带成像仪发射以来获取的高质量图像数据、地表反射率产品和地表温度产品，为该区域土地资源、湖泊水文学、生态环境和生物多样性、气候变化以及冰川变化的研究提供了丰富的数据资源。