MOD10A1.061 Terra Snow Cover Daily Global 500m

Dataset Availability

2000-02-24T00:00:00Z–2024-12-19T00:00:00Z

Dataset Provider

NASA NSIDC DAAC at CIRES

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MOD10A1")

Cadence

1 Day

Tags

albedo daily geophysical global modis nasa nsidc snow terra

mod10a1

Description

The MOD10A1 V6.1 Snow Cover Daily Global 500m product contains snow cover, snow albedo, fractional snow cover, and quality assessment (QA) data. Snow cover data are based on a snow mapping algorithm that employs a Normalized Difference Snow Index (NDSI) and other criteria tests.

General documentation

Bands

Resolution
500 meters

Bands

Name	Min	Max	Scale	Description
NDSI_Snow_Cover	0	100		NDSI snow cover. This value is computed for MOD10_L2 and retrieved when the observation of the day is selected. Provider values above 100 are masked out in this band (they can be found in the "NDSI_Snow_Cover_Class" band).
NDSI_Snow_Cover_Basic_QA				A basic estimate of the quality of the algorithm result. This value is computed for MOD10_L2 and retrieved with the corresponding observation of the day.
Bitmask for NDSI_Snow_Cover_Basic_QA Bits 0-15: QA 0: Best 1: Good 2: Ok 3: Poor - not currently in use 211: Night 239: Ocean
NDSI_Snow_Cover_Algorithm_Flags_QA				Bit flags indicating screen results and the presence of inland water. These flags are set when MOD10_L2 is generated and retrieved with the corresponding observation of the day.
Bitmask for NDSI_Snow_Cover_Algorithm_Flags_QA Bit 0: Inland water 0: No 1: Yes Bit 1: Low visible screen failed. Snow detection reversed. 0: No fail/not reversed 1: The MODIS band 2 reflectance is <= 0.10 or the band 4 reflectance is <= 0.11 Bit 2: Low NDSI screen failed. Snow detection reversed. 0: No fail/not reversed 1: Pixels detected as having snow cover with 0.0 < NDSI < 0.10 are reversed to no snow Bit 3: Combined temperature/height screen failed. 1: Brightness temperature >= 281K, pixel height < 1300m, flag set, snow detection reversed to not snow or brightness temperature >= 281K, pixel height >= 1300m, flag set, snow detection NOT reversed. Bit 4: Shortwave IR (SWIR) reflectance anomalously high. 1: Snow pixel with SWIR > 0.45, flag set, snow detection reversed to not snow or snow pixel with 25% < SWIR <= 45%, flag set to indicate unusual snow condition, snow detection NOT reversed. Bit 5: Spare 0: N/A Bit 6: Spare 0: N/A Bit 7: Solar zenith screen failed (angles exceed 70°), uncertainty increased. 0: No 1: Yes
NDSI	0	10000	0.0001	Raw NDSI (i.e. prior to screening). This value is computed for MOD10_L2 and retrieved with the corresponding observation of the day.
Snow_Albedo_Daily_Tile	1	100		Snow albedo percentage. Provider values above 100 are masked out in this band (they can be found in the "Snow_Albedo_Daily_Tile_Class" band).
orbit_pnt				Pointer to the orbit number of the swath that was selected as the observation of the day. The pointer references by index the list of orbit numbers written to the ORBITNUMBERARRAY metadata object in ArchiveMetadata.0.
granule_pnt				Pointer to the granule (swath) that was mapped into the tile. The pointer references the corresponding value in the GRANULEPOINTERARRAY metadata object written to ArchiveMetadata.0.
NDSI_Snow_Cover_Class				Landcover classes from the "NDSI_Snow_Cover" subdataset (provider values less than or equal to 100 are masked out).
Snow_Albedo_Daily_Tile_Class				Landcover classes from the "Snow_Albedo_Daily_Tile" subdataset (provider values less than or equal to 100 are masked out).

NDSI_Snow_Cover_Class Class Table

Value	Color	Description
200		Missing data
201		No decision
211		Night
237		Inland water
239		Ocean
250		Cloud
254		Detector saturated

Snow_Albedo_Daily_Tile_Class Class Table

Value	Color	Description
101		No decision
111		Night
125		Land
137		Inland water
139		Ocean
150		Cloud
151		Cloud detected as snow
250		Missing
251		Self-shadowing
252		Land mask mismatch
253		BRDF failure
254		Non-production mask

Terms of Use

Terms of Use

You may download and use photographs, imagery, or text from the NSIDC web site, unless limitations for its use are specifically stated. For more information on usage and citing NSIDC datasets, please visit the NSIDC 'Use and Copyright' page.

Citations

Citations:

• Hall, D. K., V. V. Salomonson, and G. A. Riggs. 2016. MODIS/Terra Snow Cover Daily L3 Global 500m Grid. Version 6. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center.

DOIs

• https://doi.org/10.5067/MODIS/MOD10A1.061

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MOD10A1')
                  .filter(ee.Filter.date('2018-04-01', '2018-05-01'));
var snowCover = dataset.select('NDSI_Snow_Cover');
var snowCoverVis = {
  min: 0.0,
  max: 100.0,
  palette: ['black', '0dffff', '0524ff', 'ffffff'],
};
Map.setCenter(-41.13, 76.35, 3);
Map.addLayer(snowCover, snowCoverVis, 'Snow Cover');

Open in Code Editor

MOD10A1.061 Terra Snow Cover Daily Global 500m

The MOD10A1 V6.1 Snow Cover Daily Global 500m product contains snow cover, snow albedo, fractional snow cover, and quality assessment (QA) data. Snow cover data are based on a snow mapping algorithm that employs a Normalized Difference Snow Index (NDSI) and other criteria tests. General documentation

MODIS/061/MOD10A1, albedo,daily,geophysical,global,modis,nasa,nsidc,snow,terra

2000-02-24T00:00:00Z/2024-12-19T00:00:00Z

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.5067/MODIS/MOD10A1.061