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Full catalog/MIL3YAL
MIL3YAL·v006·dataset

How much sunlight the surface reflects, yearly (MISR)

MISR Level 3 Component Global Albedo product covering a year V006
atmosphere NASA LARC_CLOUD Level 3 active HDF-EOS2
In plain English

What it measures. A yearly global summary of how much sunlight the surface reflects (albedo), plus a measure of haze in the air and a breakdown of the types of airborne particles present.

How it's made. Built from the nine-angle MISR camera system on NASA's Terra satellite, with Level 2 results averaged over a year onto a 1-degree and 5-degree grid.

How & where you'd use it. Used to study how reflective Earth's surface is, which influences how much solar energy the planet absorbs, an important factor in climate.

What's measured

ATMOSPHERE › ATMOSPHERIC RADIATION › ALBEDOATMOSPHERE › AIR QUALITY › TURBIDITYATMOSPHERE › AIR QUALITY › PARTICULATES

Coverage & cadence

  • Time span1999-12-01 → ongoing
  • Measured byTerra (MISR)
  • Processing levelLevel 3
  • Spatial extent-180, -90, 180, 90
  • FormatsHDF-EOS2
  • StatusACTIVE

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

MIL3YAL_006 Multi-angle Imaging SpectroRadiometer (MISR) Level 3 Component Global Albedo product covering a year version 6 data product. 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 year and reported on a geographic grid, 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.

Get the data

mil3yal_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="MIL3YAL",
    version="006",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from LARC_CLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.