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Full catalog/VJ110A1F
VJ110A1F·v2·dataset

Where there's snow, gap-filled (NOAA-20, daily, 375 m)

VIIRS/JPSS1 CGF Snow Cover Daily L3 Global 375m SIN Grid V002
cryosphere NASA NSIDC_CPRD Level 3 active HDF-EOS5
In plain English

What it measures. A daily, cloud-free map of where snow covers the land. Where clouds blocked the view, the dataset fills in a best estimate of the snow likely underneath.

How it's made. Built from the VIIRS instrument on the NOAA-20 satellite, then run through a gap-filling step that replaces cloud-blocked pixels and maps everything to a roughly 375-meter grid.

How & where you'd use it. Helps with tracking snow seasons, water supply forecasting, and flood and climate studies, since a cloud-free daily snow map is more usable than one full of gaps.

What's measured

CRYOSPHERE › SNOW/ICE › SNOW COVER

Coverage & cadence

  • Time span2018-01-05 → ongoing
  • Measured byJPSS-1 (VIIRS) · NOAA-20 (VIIRS)
  • Processing levelLevel 3
  • Spatial extent-180, -90, 180, 90
  • FormatsHDF-EOS5
  • StatusACTIVE

What you can do with it

  • Measure sea ice, snow cover and glaciers
  • Watch ice-sheet elevation change
  • Track freeze/thaw and permafrost
Official description

This data set contains daily 'cloud-free' snow cover produced from the VIIRS/JPSS-1 Snow Cover Daily L3 Global 375m SIN Grid, Version 2 snow cover product. A cloud-gap-filled algorithm is utilized to replace ‘cloud-covered’ pixels with ‘cloud-free pixels’ for the purpose of estimating the snow cover that may exist under current cloud cover. The data are provided daily and mapped to a 375 m sinusoidal grid.

Get the data

vj110a1f_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="VJ110A1F",
    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 NSIDC_CPRD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.