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Full catalog/PACE_OCI_L3M_SFREFL
PACE_OCI_L3M_SFREFL·v3.1·dataset

True surface color of the land (PACE)

PACE OCI Level-3 Global Mapped Surface Reflectance Data, version 3.1
land NASA OB_CLOUD Level 3 active netCDF-4
In plain English

What it measures. The true color of the land surface itself, with the haze of the atmosphere stripped out, captured across 122 narrow color bands from ultraviolet through near-infrared and a few shortwave-infrared bands.

How it's made. Produced from the OCI instrument on NASA's PACE satellite and stitched into a single cloud-masked global map (Level-3) after correcting for the atmosphere.

How & where you'd use it. Serves as the foundation for vegetation and land products built on top of it, and helps scientists study plants, soils, and land surfaces in fine spectral detail.

What's measured

LAND SURFACE › SURFACE RADIATIVE PROPERTIES › REFLECTANCELAND SURFACE › SURFACE RADIATIVE PROPERTIES

Coverage & cadence

  • Time span2024-03-05 → ongoing
  • Measured byPACE (OCI)
  • Processing levelLevel 3
  • Spatial extent-180, -90, 180, 90
  • FormatsnetCDF-4
  • 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

Surface Reflectance (SFREFL) provides the unitless, bottom-of-atmosphere reflectance of the Earth's surface at 122 wavelengths (346 - 895 nm, with 5 SWIR bands). Surface Reflectance is the foundational input for downstream land products (e.g., vegetation indices included in the LANDVI suite). Users should review the documentation for more information on atmospheric correction and quality flags. Users should also note that the L3M product is masked for clouds. Geophysical variables in this suite include: - rhos – Surface reflectance (unitless)

Get the data

pace_oci_l3m_sfrefl_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="PACE_OCI_L3M_SFREFL",
    version="3.1",
    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 OB_CLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.