VIIRS/JPSS1 Land Surface Temperature and Emissivity 6-Min L2 Swath 750m

The Near Real Time (NRT) VIIRS Land Surface Temperature and Emissivity 6-Min L2 Swath 750m product (VJ121_NRT) uses a physics-based algorithm to dynamically retrieve both the LST and emissivity simultaneously for the three VIIRS thermal infrared bands M14 (8.55 micrometer), M15 (10.76 micrometer), and M16 (12 micrometer) at a spatial resolution of 750 m at nadir. The VJ!21 algorithm is based on the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Temperature Emissivity Separation (TES) algorithm. This algorithm uses full radiative transfer simulations for the atmospheric correction, and an emissivity model based on the variability in the surface radiance data to dynamically retrieve both LST and spectral emissivity at native pixel resolution. Additional details regarding the methodology are available in the Algorithm Theoretical Basis Document (ATBD) at:

https://viirsland.gsfc.nasa.gov/PDF/VNP21_LSTE_ATBD_v2.1.pdf

and user guide at:

https://viirsland.gsfc.nasa.gov/PDF/VNP21_LSTE_user_guide.pdf

近实时（NRT）VIIRS陆地表面温度和发射率6分钟L2条带750米产品（VJ121_NRT）采用基于物理的算法，动态同时获取三个VIIRS热红外波段M14（8.55微米）、M15（10.76微米）和M16（12微米）的陆地表面温度（LST）和发射率，空间分辨率为750米，在视场中心点进行测量。VJ!21算法基于高级机载热辐射和反射辐射计（ASTER）温度发射率分离（TES）算法。此算法采用完整的辐射传输模拟进行大气校正，并基于表面辐射亮度数据的变异性构建发射率模型，以动态获取原生像素分辨率的LST和光谱发射率。有关该方法论的详细信息，请参阅算法理论基础文档（ATBD）及用户指南，链接如下：
https://viirsland.gsfc.nasa.gov/PDF/VNP21_LSTE_ATBD_v2.1.pdf

https://viirsland.gsfc.nasa.gov/PDF/VNP21_LSTE_user_guide.pdf

搜集汇总

背景与挑战

背景概述

该数据集是近实时VIIRS地表温度与发射率6分钟L2级条带数据，空间分辨率为750米，使用物理算法同时反演三个热红外波段的地表温度和发射率，算法基于ASTER TES方法，通过辐射传输模拟和动态发射率模型实现高精度检索。