BOREAS LEVEL-3S SPOT IMAGERY: SCALED AT-SENSOR RADIANCE IN LGSOWG FORMAT

For BOREAS, the level-3s SPOT data, along with the other remotely sensed images, were collected in order to provide spatially extensive information over the primary study areas. This information includes radiant energy, detailed land cover, and biophysical parameter maps such as FPAR and LAI. The SPOT images acquired for the BOREAS project were selected primarily to fill temporal gaps in the Landsat TM image data collection. CCRS collected and supplied the level-3s images to BORIS for use in the remote sensing research activities. Spatially, the level-3s images cover 60-by 60-km portions of the BOREAS NSA and SSA. Temporally, the images cover the period of 17-Apr-1994 to 30-Aug-1996. The images are available in binary image format files. Companion files include (1) an image inventory listing to inform users of the images that are available and (2) example thumbnail images.

针对BOREAS项目，三级（level-3s）SPOT数据与其他遥感影像一并采集，旨在为核心研究区域提供覆盖范围广泛的空间信息。此类信息涵盖辐射能、精细化土地覆盖数据，以及光合有效辐射吸收比率（Fraction of Photosynthetically Active Radiation，FPAR）、叶面积指数（Leaf Area Index，LAI）等生物物理参数分布图集。为BOREAS项目获取的SPOT影像，主要用于填补陆地卫星TM（Landsat Thematic Mapper，Landsat TM）影像数据采集中的时间空白。加拿大遥感中心（Canada Centre for Remote Sensing，CCRS）将采集得到的level-3s级影像提供给BORIS，用于遥感研究相关工作。空间维度上，这批level-3s级影像覆盖了BOREAS项目北部研究区（NSA）与南部研究区（SSA）内60×60千米的区域；时间维度上，其覆盖时段为1994年4月17日至1996年8月30日。该批影像以二进制影像格式文件形式提供，配套文件包含两类：（1）影像清单列表，用于向用户告知可获取的影像资源；（2）示例缩略影像。