MISR Level 3 Component Global Albedo product in netCDF format covering a month V006

MISR Level 3 Component Global Albedo is a publicly available product in netCDF format covering a month.

MIL3MALN_006 is the Multi-angle Imaging SpectroRadiometer (MISR) Level 3 Component Global Albedo product in netCDF format covering a month version 6. It contains a statistical summary of column albedo 555-nanometer optical depth and a monthly aerosol compositional type frequency histogram. This data product is a global summary of relevant Level 2 albedo parameters, averaged over a month and reported on a geographic grid, it has multiple data layers, with varying temporal resolutions of 1 degree by 1 degree, and 5 degrees by 5 degrees. Data collection for this product is ongoing.

The MISR instrument consists of nine push-broom cameras that measure radiance in four spectral bands. Global coverage is achieved in nine days. The cameras are arranged with one camera pointing toward the nadir, four forward, and four aftward. It takes seven minutes for all nine cameras to view the same surface location. The view angles relative to the surface reference ellipsoid are 0, 26.1, 45.6, 60.0, and 70.5 degrees. The spectral band shapes are nominally Gaussian, centered at 443, 555, 670, and 865 nm.

MISR is designed to view Earth with cameras pointed in 9 different directions. As the instrument flies overhead, each piece of Earth's surface below is successfully imaged by all nine cameras in 4 wavelengths (blue, green, red, and near-infrared). The goal of MISR is to improve our understanding of the effects of sunlight on Earth and distinguish different types of clouds, particles, and surfaces. Specifically, MISR monitors the monthly, seasonal, and long-term trends in three areas: 1) amount and type of atmospheric particles (aerosols), including those formed by natural sources and by human activities; 2) amounts, types, and heights of clouds, and 3) distribution of land surface cover, including vegetation canopy structure.

多角度成像光谱辐射计（Multi-angle Imaging SpectroRadiometer，MISR）三级组分全球反照率产品是一款以netCDF格式存储的月度公开数据集。
产品编号为MIL3MALN_006的是第六版月度netCDF格式MISR三级组分全球反照率产品。该产品包含柱面反照率、555纳米光学厚度的统计汇总结果，以及月度气溶胶组分类型频率直方图。本数据集是对相关二级反照率参数的全球汇总：以月度为周期进行平均，并基于地理网格进行发布，包含多个数据图层，空间分辨率涵盖1°×1°与5°×5°两种规格。该产品的数据采集工作仍在持续进行中。
MISR载荷搭载9台推扫式相机，可采集4个光谱波段的辐射亮度数据，可在9天内完成全球覆盖。相机布局为：1台天底指向相机、4台前向相机与4台后向相机。所有9台相机完成对同一地表位置的成像需耗时7分钟。相对于地表参考椭球体的观测天顶角分别为0°、26.1°、45.6°、60.0°与70.5°。光谱波段的线型近似为高斯分布，中心波长分别为443纳米、555纳米、670纳米与865纳米。
MISR的设计目标是通过9个不同指向的相机对地观测。当载荷飞越上空时，地表的每一处区域都会被9台相机以4个波长（蓝、绿、红与近红外）依次成像。MISR的核心任务是加深人类对太阳光对地球影响的理解，并区分不同类型的云、大气粒子与地表覆盖物。具体而言，MISR将监测三个领域的月度、季节与长期变化趋势：1）大气粒子（气溶胶）的含量与类型，包括自然源与人为源产生的气溶胶；2）云的含量、类型与云顶高度；3）地表覆盖分布，包括植被冠层结构。