Earth Data School
About
Full catalog/OMPS_NPP_LP_L1G_EV
OMPS_NPP_LP_L1G_EV·v2·dataset

Raw light by wavelength and altitude (Suomi-NPP)

OMPS-NPP L1G LP Radiance EV Wavelength-Altitude Grid swath orbital 3slit V2 (OMPS_NPP_LP_L1G_EV) at GES DISC
land NASA GES_DISC Level 1B active
In plain English

What it measures. Calibrated readings of how much light Earth's atmosphere sends back to the sensor, broken out by wavelength (from 280 to 1000 nm) and by altitude up to about 80 km.

How it's made. A low-level (Level 1G) product from the OMPS Limb-Profiler on the Suomi-NPP satellite, which views the atmosphere's edge along three profiles per orbit; stored in HDF5 format.

How & where you'd use it. A building-block input that higher-level products turn into ozone and atmospheric profiles; most users access it indirectly through those derived products rather than directly.

What's measured

SPECTRAL/ENGINEERING › ULTRAVIOLET WAVELENGTHS › ULTRAVIOLET RADIANCESPECTRAL/ENGINEERING › VISIBLE WAVELENGTHS › VISIBLE RADIANCESPECTRAL/ENGINEERING › INFRARED WAVELENGTHS › INFRARED RADIANCE

Coverage & cadence

  • Time span2011-11-07 → ongoing
  • Measured bySuomi-NPP (OMPS)
  • Processing levelLevel 1B
  • Spatial extent-180, -84, 180, 84
  • 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 L1G LP Radiance EV Wavelength-Altitude Grid swath orbital 3slit product contains the calibrated earth-viewing radiances measured by the Ozone Mapping and Profiling Suite (OMPS) Limb-Profiler (LP) sensor on the Suomi-NPP satellite. The LP L1G product measures radiances in the wavelength region from 280 nm to 1000 nm. Each granule contains data from the daylight portion of each orbit measured for a full day. Spatial coverage is global (-90 to 90 degrees latitude), and there are about 14.5 orbits per day each measuring three limb profiles spaced approximately 250 km in the cross-track direction. The profiles are measured from the ground up to about 80 km with a vertical resolution of the retrieved profiles of approximately 1-2 km. The data are written using the Hierarchical Data Format Version 5 or HDF5.

Get the data

omps_npp_lp_l1g_ev_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="OMPS_NPP_LP_L1G_EV",
    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.