CALIPSO L1B数据学习笔记

一、变量含义

1. Land_Water_Mask：数据有效范围0-7，分别对应shallow ocean,land,coastlines,shallow inland water,intermittent water,deep inland water,continental ocean,deep ocean。
2. IGBP_Surface_type：0-18，evergreen needleleaf forest, evergreen broadleaf forest, deciduous needleleaf forest, deciduous broadleaf forest, mixed forest, closed shrublands, open shrublands,woody savannas, savannas, grasslands, permanent wetlands, croplands, urban and built-up,cropland/natural vegetation mosaic, snow and ice, barren or sparsely vegetated, water bodies, tundra
3. Day_Night_Flag: 0 Day 1 Night
4. Total_Attenuated_Backscatter和Perpendicular_Attenuated_Backscatter，后向衰减散射信号的总值与垂直极化的衰减后向散射。
5. Spacecraft_Altitude，700-740，卫星平台的高度。
6. Surface_Elevation，-1~9km，海洋区域的高度均为0
   
   二、衰减后向散射数据
   包含总衰减后向散射及垂直后向衰减后向散射，可求得平行通道的值
   L1B数据总是在第564个取得最大值，即为海平面以下的第一个bin，0-22.5m