Earth Data School
About
Full catalog/g3atb
g3atb·v004·dataset

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

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

What it measures. How much sunlight is dimmed as it passes through different layers of the atmosphere during a single sunrise or sunset. This is the raw transmission measurement before it's turned into gas concentrations.

How it's made. Captured by the SAGE III instrument on the Meteor-3M satellite as light-transmission profiles, stored in its native format at an early processing stage.

How & where you'd use it. A building-block input that gets turned into the actual gas measurements people use; most users access it indirectly through higher-level products rather than 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
  • FormatsBinary
  • 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

g3atb_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="g3atb",
    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.