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Full catalog/TEMPO_RADT_L1
TEMPO_RADT_L1·vV04·dataset

Raw twilight light measured over North America (TEMPO)

TEMPO geolocated Earth radiances twilight V04 (PROVISIONAL)
atmosphere NASA LARC_CLOUD Level 1B active netCDF-4
In plain English

What it measures. How much light the sensor recorded over North America during twilight, designed to capture city lights, at roughly 10-kilometer detail, with each reading tied to a location.

How it's made. Produced from the TEMPO instrument (on a satellite over North America) by calibrating and geolocating the raw twilight readings; the data are provisional.

How & where you'd use it. A low-level building-block product; the captured city-light signal can support studies of nighttime lighting and is typically used via further processing rather than directly.

What's measured

ATMOSPHERE › ATMOSPHERIC RADIATIONATMOSPHERE › ATMOSPHERIC RADIATION › RADIATIVE FLUX

Coverage & cadence

  • Time span2023-09-27 → ongoing
  • Measured byIS-40e (TEMPO)
  • Processing levelLevel 1B
  • FormatsnetCDF-4
  • StatusACTIVE

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 1 twilight radiance files provide radiance measured during twilight hours to capture city lights at TEMPO’s native spatial resolution, ~10km^2 at the center of the Field of Regard (FOR), for individual granules. Each granule covers the entire North-South TEMPO FOR but only a portion of the East-West FOR. The files are provided in netCDF4 format, and contain information on radiometrically calibrated and geolocated radiances for the UV and visible bands, corresponding noise, geolocation, viewing geometry, quality flags and other ancillary information. The product is produced using the L0-1b processor which includes image processing steps to produce radiometrically calibrated radiances with nominal navigation. These data reached provisional validation on December 9, 2024.

Get the data

tempo_radt_l1_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TEMPO_RADT_L1",
    version="V04",
    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.