VIIRS snow cover (VNP10A1, VNP10A1F)#

viirs-snow · theme snow · live

Suomi-NPP VIIRS daily NDSI snow cover and the cloud-gap-filled daily product at 375 m, version 2, with the NOAA-20 (VJ1) siblings. The successor to the MODIS snow products as Terra winds down.

import easysnowdata as esd

aoi = (-121.94, 46.72, -121.54, 46.99)   # Mount Rainier
data = esd.snow.viirs.load(aoi, time="2024-03")

Credentials

The default route needs earthdata; see the credentials page for the setup.

Sources#

source

provider

credentials

resolution

extent

temporal

latency

notes

nsidc (default)

earthdata

earthdata

375 m

global

2012-01/present

~1 day

HDF-EOS5 granules, cloud-hosted at NSIDC_CPRD; read through the HDF5 driver with the grid taken from StructMetadata.0

Where each route points#

nsidc — NSIDC (Earthdata) live

VNP10A1 / VNP10A1F (and the VJ1 NOAA-20 siblings)

Variables#

variable

units

dtype

nodata

categorical

NDSI_Snow_Cover

%

uint8

255

yes (10 classes)

CGF_NDSI_Snow_Cover

%

uint8

255

yes (10 classes)

Cloud_Persistence

days

uint8

255

no

Basic_QA

—

uint8

255

yes (7 classes)
NDSI_Snow_Cover classes (10)

value

meaning

200

missing_data

201

no_decision

211

night

237

inland_water

239

ocean

250

cloud

251

cloud

252

cloud

254

detector_saturated

255

fill
CGF_NDSI_Snow_Cover classes (10)

value

meaning

200

missing_data

201

no_decision

211

night

237

inland_water

239

ocean

250

cloud

251

cloud

252

cloud

254

detector_saturated

255

fill
Basic_QA classes (7)

value

meaning

0

best

1

good

2

ok

3

poor

211

night

239

ocean

255

unusable

Provenance#

Licence · NASA Earthdata (free registration)

DOI · 10.5067/VIIRS/VNP10A1F.002

Cite the data as

Riggs, G. A., Hall, D. K. and Román, M. O. (2019). VIIRS/NPP Snow Cover Daily L3 Global 375m SIN Grid, Version 2 (VNP10A1); Cloud Gap Filled (VNP10A1F). NASA NSIDC DAAC.

Documentation

Loader · easysnowdata.snow.viirs.load