Landsat 8

The Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) are onboard the Landsat 8 satellite, have acquired images of the Earth since February 2013. The sensors collect images of the Earth with a 16-day repeat cycle, referenced to the Worldwide Reference System-2. The approximate scene size is 170 km north-south by 183 km east-west (106 mi by 114 mi).

Landsat 8 image data files consist of 11 spectral bands with a spatial resolution of 30 meters for bands 1-7 and bands 9-11; 15-meters for the panchromatic band 8. Delivered Landsat 8 Level-1 data typically include both OLI and TIRS data files; however, there may be OLI-only and/or TIRS-only scenes in the USGS archive. A Quality Assurance (QA.tif) band is also included. This file provides bit information regarding conditions that may affect the accuracy and usability of a given pixel – clouds, water or snow, for example.

操作型陆地成像仪（OLI）和热红外传感器（TIRS）均搭载于Landsat 8卫星之上，自2013年2月起已获取地球影像。这些传感器以16天为一个重复周期，参照全球参考系统-2，采集地球影像。场景大小约为北南方向170公里、东西方向183公里（约合106英里×114英里）。Landsat 8影像数据文件包含11个光谱波段，其中1-7波段和9-11波段的分辨率为30米；第8波段的全色波段分辨率为15米。交付的Landsat 8一级数据通常包括OLI和TIRS数据文件；然而，在美国地质调查局（USGS）的存档中，可能存在仅包含OLI或仅包含TIRS的场景。此外，还包括一个质量保证（QA.tif）波段。该文件提供了有关可能影响特定像素准确性和可用性的条件（如云、水或雪等）的位信息。