VIIRS/NPP Imagery Resolution Terrain-Corrected Geolocation 6-Min L1 Swath 375m NRT

The VIIRS/NPP Imagery Resolution Terrain-Corrected Geolocation 6-Min L1 Swath 375m Near Real Time (NRT) product, short-name VNP03IMG includes the geolocation fields that are calculated for each VIIRS imagery resolution band (I-band) Line of sight (LOS) for all orbits at the nominal resolution of 375 m. The locations and ancillary information correspond to the intersection of the centers of each Field of View (FOV) from 32 detectors in an ideal I-band on the Earth's surface. A digital terrain model is used to model the Earth's surface. The main inputs are the spacecraft attitude and orbit ephemeris data, the instrument telemetry and the digital elevation model. The geolocation fields contained within the VNP03IMG Geolocation files include geodetic latitude, longitude, surface height above the geoid, solar zenith and azimuth angles, satellite zenith and azimuth angles, and a land/water mask for each 375m sample. Additional information is included in the header to enable the calculation of the approximate location of the center of the detectors for any of the VIIRS bands. This product is used as input by a large number of subsequent VIIRS Imagery Resolution products, particularly those produced by the Land team.

本数据集为 VIIRS/NPP 影像分辨率地形校正地理定位 6 分钟 L1 波段 375 米近实时（NRT）产品，简称 VNP03IMG，其中包含针对每个 VIIRS 影像分辨率波段（I 波段）视线（LOS）所计算的地理定位字段，适用于所有轨道，其标准分辨率为 375 米。所涉及的位置和辅助信息与地球表面上理想 I 波段中 32 个探测器视场（FOV）中心相交。通过数字地形模型来模拟地球表面。主要输入包括航天器姿态和轨道摄动数据、仪器遥测数据和数字高程模型。VNP03IMG 地理定位文件中包含的地理定位字段包括大地纬度、经度、相对于大地水准面的表面高度、太阳天顶和方位角、卫星天顶和方位角，以及每个 375 米样本的土地/水域掩膜。此外，头部信息中还包含附加信息，以计算 VIIRS 各波段探测器中心的近似位置。该产品被大量后续的 VIIRS 影像分辨率产品用作输入，特别是由陆地团队生产的那些产品。