MODIS/Aqua Land Surface Temperature/3-Band Emissivity 5-Min L2 1km NRT

The MODIS/Aqua Land Surface Temperature/3-Band Emissivity (LST&E) 5-Min L2 1km data product, short-name MYD21 is produced daily in five minute temporal increments of satellite acquisition. The swath is approximately 2,030 pixels along track and 1,354 pixels per line, at a nadir resolution of 1,000 meters. The MYD21 Land Surface Temperature (LST) algorithm differs from the MYD11 (https://doi.org/10.5067/modis/myd11_l2.061) algorithm in that the MYD21 LST algorithm is based on the ASTER Temperature/Emissivity Separation (TES) technique, whereas the MYD11 uses the split-window technique. Additional details regarding the method used to create this Level 2 (L2) product are available in the Algorithm Theoretical Basis Document (ATBD (https://lpdaac.usgs.gov/documents/107/MOD21_ATBD.pdf)).

The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and more.

MODIS/Aqua 陆地表面温度/3波段发射率（LST&E）5分钟L2 1公里数据产品，简称MYD21，每日以五分钟为时间增量生成。该数据条的宽度约为2,030个像素，每行约1,354个像素，赤道点分辨率为1,000米。MYD21陆地表面温度（LST）算法与MYD11（https://doi.org/10.5067/modis/myd11_l2.061）算法不同，MYD21 LST算法基于ASTER温度/发射率分离（TES）技术，而MYD11采用分窗技术。有关创建此二级（L2）产品所使用方法的详细信息，可在算法理论基础文档（ATBD（https://lpdaac.usgs.gov/documents/107/MOD21_ATBD.pdf））中找到。版本6.1的L1B产品通过以下各种校准变更得到了改进：包括改变响应-扫描角（RVS）方法，该方法影响Aqua和Terra MODIS的反射率波段；对Terra MODIS红外（IR）波段的视觉串扰进行校正，以及其他更多变更。