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Full catalog/TEMPO_CLDO4_L2_NRT
TEMPO_CLDO4_L2_NRT·vV02·dataset

Cloud height and cover, near-real-time (TEMPO)

TEMPO cloud pressure and fraction (O2-O2 dimer) V02 (NRT) (PROVISIONAL)
atmosphere NASA LARC_CLOUD Level 2 active netCDF-4
In plain English

What it measures. Cloud information for individual scenes, including how much of each area is cloudy, how high the clouds sit, and how bright the scene is, at about 10-km detail.

How it's made. Produced quickly from TEMPO's measurements using a fast version of the standard processing, trading some refinement for speed.

How & where you'd use it. Provided fast (within a few hours) for time-sensitive needs; cloud data also matters for correctly interpreting air-pollution measurements from the same instrument. This is a provisional product.

What's measured

ATMOSPHERE › CLOUDS › CLOUD PROPERTIES › CLOUD TOP PRESSUREATMOSPHERE › CLOUDS › CLOUD PROPERTIES › CLOUD FRACTION

Coverage & cadence

  • Time span2025-09-17 → ongoing
  • Measured byIS-40e (TEMPO)
  • Processing levelLevel 2
  • 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

O2-O2 cloud Level 2 (PROVISIONAL) files provide cloud information at TEMPO’s native spatial resolution, ~10 km^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 effective cloud fraction (ECF), cloud optical centroid pressure (OCP), scene albedo, scene pressure, ancillary data used in the calculation, and processing quality flags. The ECF is derived from reflectance at 466 nm. The OCP is derived from O2-O2 slant column density. The cloud retrieval uses Look Up Tables (LUTs) of reflectance and air mass factors as a function of geometry, surface albedo, surface pressure and cloud pressure. The O2-O2 cloud near real-time(NRT) files are produced using a fast version of the TEMPO baseline retrieval processor. The TEMPO NRT products are useful for applications with low-latency requirements (<2-3 hours after observation is taken). The NRT processing optimizes radiance calibration, image navigation and registration, and cloud and trace gas retrievals for rapid processing, while ensuring that product quality is sufficient for most NRT applications.

Get the data

tempo_cldo4_l2_nrt_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TEMPO_CLDO4_L2_NRT",
    version="V02",
    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.