Spectrometer orthorectified surface directional reflectance - mosaic (DP3.30006.001)

The NEON AOP surface directional reflectance data product is an orthorectified (UTM projection) hyperspectral raster product. It is distributed in an open HDF5 format including all 426 bands from the NEON Imaging Spectrometer. It is a calibrated and atmospherically corrected product distributed as scaled reflectance. It includes many QA and ancillary rasters used as inputs to ATCOR for atmospheric correction as well as outputs from ATCOR for diagnostic purposes. L3 reflectance is distributed in 1 km by 1 km tiles with one HDF5 file per tile including the reflectance data and all metadata and ancillary data. The mosaic is created using the most-nadir pixels from the flight lines observed with the least cloud cover. Reflectance tiles are used to to calculate Level 3 Vegetation Indices, Water Indices, LAI, and fPAR.

Latency:
AOP data will be available 60 days after the final collection day at a site.

NEON航空观测平台（Airborne Observation Platform，AOP）的地表方向反射率数据产品，是一款经正射校正（采用UTM投影）的高光谱栅格产品。该产品以开放的HDF5格式分发，涵盖NEON成像光谱仪的全部426个光谱波段。其为经过辐射定标与大气校正的数据产品，以缩放后的反射率值形式发布。产品包含诸多用于ATCOR大气校正流程的质量控制（QA，Quality Assurance）与辅助栅格数据，以及ATCOR输出的诊断类数据。L3级反射率数据以1km×1km的瓦片单元进行分发，每个瓦片对应一个HDF5文件，内含反射率数据、全部元数据与辅助数据。数据镶嵌图采用云量最少的飞行航线中最接近天底位置的像素生成。反射率瓦片可用于计算三级植被指数、水体指数、叶面积指数（LAI，Leaf Area Index）以及光合有效辐射分量（fPAR，Fraction of Photosynthetically Active Radiation）。
数据交付延迟：单站点最终数据采集完成后，对应AOP数据将在60天内开放获取。