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Full catalog/sentinel-5p-l1-ra-bd4-offl
sentinel-5p-l1-ra-bd4-offl·dataset

Air-monitoring raw light, UV band 4, offline (Copernicus)

Sentinel-5P Level 1 Radiance Band 4 (OFFL)
atmosphere ESA ESA Copernicus active
In plain English

What it measures. Calibrated raw readings of Earth's reflected light in ultraviolet spectral band 4. This is sensor-level data preceding any atmospheric calculation.

How it's made. Measured by the TROPOMI instrument on ESA Copernicus's Sentinel-5P satellite, processed to Level-1 in routine offline mode.

How & where you'd use it. Used as standard input in the chains that generate air-quality products; a technical resource rather than a finished dataset.

What's measured

SentinelCopernicusESASatelliteGlobalAtmosphereL1RA-BD4OFFLEUEC

Coverage & cadence

  • Time span2018-04-30 → ongoing
  • Spatial extent-180, -90, 180, 90

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 Collection provides Sentinel-5P Level-1 RA BD4 products, which contains Earth radiance spectra for spectral band 4.

Get the data

copernicus_access.py
# ESA Copernicus Data Space — open STAC API (free account)
from pystac_client import Client

cat = Client.open("https://stac.dataspace.copernicus.eu/v1")
search = cat.search(
    collections=["sentinel-5p-l1-ra-bd4-offl"],   # add _cog or _nc for a format variant
    bbox=(-10, 35, 30, 60),             # your area (W,S,E,N)
    datetime="2024-01-01/2024-12-31",
)
items = list(search.items())            # then read assets with rioxarray / xarray
Browsing the Copernicus STAC is open; downloading bytes needs a free Copernicus Data Space account.