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Full catalog/OMPS_NPP_NPEV_L1B
OMPS_NPP_NPEV_L1B·v2·dataset

Raw calibrated light readings (Suomi-NPP)

OMPS/NPP L1B NP Radiance EV Calibrated Geolocated Swath Orbital V2 (OMPS_NPP_NPEV_L1B) at GES DISC
land NASA GES_DISC Level 1B active
In plain English

What it measures. Raw but calibrated readings of how much ultraviolet light (in the 300 to 380 nanometer range) the sensor recorded, tagged with their precise locations on Earth.

How it's made. Captured by the OMPS Nadir-Profiler instrument on the Suomi-NPP satellite and processed to a calibrated, geolocated stage, with about one measurement per spot along the satellite's track.

How & where you'd use it. A low-level building-block input used to derive higher-level products like ozone profiles; most users work with those finished products rather than these raw light readings.

What's measured

SPECTRAL/ENGINEERING › ULTRAVIOLET WAVELENGTHS › ULTRAVIOLET RADIANCE

Coverage & cadence

  • Time span2011-11-13 → ongoing
  • Measured bySuomi-NPP (OMPS)
  • Processing levelLevel 1B
  • Spatial extent-180, -82, 180, 82
  • StatusACTIVE

What you can do with it

  • Track deforestation, fire scars and land-cover change
  • Monitor crop and vegetation health (NDVI/EVI)
  • Map how built-up vs. green an area is over time
Official description

The OMPS-NPP L1B NP Radiance EV Calibrated Geolocated Swath Orbital collection contains calibrated and geolocated radiances from 300 to 380 nm measured by the OMPS Nadir-Profiler sensor on the Suomi-NPP satellite. Each granule typically contains data from the daylight portion of a single orbit (about 50 minutes). Spatial coverage is nearly global (-82 to 82 degrees latitude), and there are about 14.5 orbits per day each with a single nadir measurement along the satellite track.

Get the data

omps_npp_npev_l1b_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="OMPS_NPP_NPEV_L1B",
    version="2",
    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.