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Full catalog/TOMSN7L3dery
TOMSN7L3dery·v008·dataset

Daily sunburn-causing UV reaching the ground (TOMS)

TOMS Nimbus-7 UV-B Erythemal Local Noon Irradiance Daily L3 Global 1 deg x 1.25 deg Lat/Lon Grid V008 (TOMSN7L3dery) at GES DISC
atmosphere NASA GES_DISC Level 3
In plain English

What it measures. How much sunburn-causing ultraviolet (UV-B) light reached the ground at local noon each day, mapped worldwide in roughly 1-by-1.25-degree squares.

How it's made. Derived from the TOMS instrument aboard the Nimbus-7 satellite and processed into a daily global grid by NASA Goddard.

How & where you'd use it. Useful for studying historical sun exposure risk, public-health research on skin cancer, and tracking long-term changes in surface UV.

What's measured

ATMOSPHERE › ATMOSPHERIC RADIATION › ULTRAVIOLET RADIATION › ERYTHEMAL IRRADIANCE

Coverage & cadence

  • Time span1978-11-01 → 1993-05-06
  • Measured byNimbus-7 (TOMS)
  • Processing levelLevel 3
  • Spatial extent-180, -90, 180, 90
  • 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

This Nimbus-7 Total Ozone Mapping Spectrometer (TOMS) version 8 daily global gridded data product contains UV-B erythemal local noon irradiance values. The data are mapped to a global grid of size 180 x 288 with a lat-long resolution of 1.00 x 1.25 degrees. These data are stored in an ASCII format. The TOMS data were produced by the Laboratory for Atmospheres at NASA Goddard Space Flight Center (Code 614).

Get the data

tomsn7l3dery_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TOMSN7L3dery",
    version="008",
    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 GES_DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.