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Full catalog/g3at
g3at·v004·dataset

Raw sunlight dimming through the atmosphere (Meteor-3M)

SAGE III Meteor-3M L1B Solar Event Transmission Data (HDF-EOS) V004
atmosphere NASA LARC_CLOUD Level 1B HDF4
In plain English

What it measures. Profiles of how much sunlight made it through Earth's atmosphere during a single sunrise or sunset event, recorded at different heights.

How it's made. A low-level (Level 1B) product from the SAGE III instrument on the Meteor-3M satellite, capturing raw transmission readings as the Sun set behind the atmosphere.

How & where you'd use it. A building-block input that scientists feed into higher-level products to work out which gases and particles are in the upper atmosphere; rarely used directly.

What's measured

ATMOSPHERE › ATMOSPHERIC RADIATION › ULTRAVIOLET RADIATIONATMOSPHERE › ATMOSPHERIC RADIATION › SHORTWAVE RADIATIONATMOSPHERE › ATMOSPHERIC RADIATION › LONGWAVE RADIATION

Coverage & cadence

  • Time span2001-12-10 → 2005-11-13
  • Measured byMeteor-3M (SAGE III)
  • Processing levelLevel 1B
  • Spatial extent-180, -90, 180, 90
  • FormatsHDF4
  • StatusCOMPLETE

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

Level 1B pixel group transmission profiles for a single solar event.

Get the data

g3at_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="g3at",
    version="004",
    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.