AI-generated Key Takeaways
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The NOAA/VIIRS/001/VNP43IA2 dataset provides daily Bidirectional Reflectance Distribution Function (BRDF) and Albedo quality information at 500m resolution, derived from Suomi NPP VIIRS imagery.
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The product utilizes 16 days of VIIRS data, temporally weighted to the ninth day, offering insights into band quality and valid observation days.
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VNP43IA2 includes bands for BRDF inversion information, land/water type, solar zenith angle, platform details, uncertainty, valid observations, and a snow flag.
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Users can access the dataset through Google Earth Engine and find comprehensive documentation, including a User's Guide and ATBD, via provided links.
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It is crucial to cite the dataset appropriately when publishing research based on it, as detailed on the LP DAAC 'Citing Our Data' page.
- Dataset Availability
- 2012-01-17T00:00:00Z–2024-06-09T00:00:00Z
- Dataset Provider
- NASA LP DAAC at the USGS EROS Center
- Cadence
- 1 Day
- Tags
Description
The Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Bidirectional Reflectance Distribution Function (BRDF) and Albedo Quality (VNP43IA2) Version 1 product provides BRDF and Albedo quality at 500m resolution. The VNP43IA2 product is produced daily using 16 days of VIIRS data and is weighted temporally to the ninth day, which is reflected in the file name. The VNP43IA2 product provides information regarding band quality and days of valid observation within a 16-day period for the VIIRS imagery bands. The VNP43 data products are designed to promote the continuity of NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) BRDF/Albedo data product suite.
Documentation:
Bands
Pixel Size
500 meters
Bands
| Name | Units | Pixel Size | Description |
|---|---|---|---|
BRDF_Albedo_Band_Quality_I1 |
meters | BRDF inversion information I1 |
|
BRDF_Albedo_Band_Quality_I2 |
meters | BRDF inversion information I2 |
|
BRDF_Albedo_Band_Quality_I3 |
meters | BRDF inversion information I3 |
|
BRDF_Albedo_LandWaterType |
meters | Land/Water type |
|
BRDF_Albedo_LocalSolarNoon |
deg | meters | Solar zenith angle at local solar noon |
BRDF_Albedo_Platform |
meters | Platform name |
|
BRDF_Albedo_Uncertainty |
meters | Weight of Determination (WoD) of WSA |
|
BRDF_Albedo_ValidObs_I1 |
d | meters | Days of valid observation within 16-day period for band I1 |
BRDF_Albedo_ValidObs_I2 |
d | meters | Days of valid observation within 16-day period for band I2 |
BRDF_Albedo_ValidObs_I3 |
d | meters | Days of valid observation within 16-day period for band I3 |
Snow_BRDF_Albedo |
meters | Snow flag |
BRDF_Albedo_Band_Quality_I1 Class Table
| Value | Color | Description |
|---|---|---|
| 0 | None | best quality, full inversion (WoDs, RMSE majority good) |
| 1 | None | good quality, full inversion |
| 2 | None | Magnitude inversion (numobs ≥ 7) |
| 3 | None | Magnitude inversion (numobs ≥ 2 & 7) |
BRDF_Albedo_Band_Quality_I2 Class Table
| Value | Color | Description |
|---|---|---|
| 0 | None | best quality, full inversion (WoDs, RMSE majority good) |
| 1 | None | good quality, full inversion |
| 2 | None | Magnitude inversion (numobs ≥ 7) |
| 3 | None | Magnitude inversion (numobs ≥ 2 & 7) |
BRDF_Albedo_Band_Quality_I3 Class Table
| Value | Color | Description |
|---|---|---|
| 0 | None | best quality, full inversion (WoDs, RMSE majority good) |
| 1 | None | good quality, full inversion |
| 2 | None | Magnitude inversion (numobs ≥ 7) |
| 3 | None | Magnitude inversion (numobs ≥ 2 & 7) |
BRDF_Albedo_LandWaterType Class Table
| Value | Color | Description |
|---|---|---|
| 0 | None | Shallow ocean |
| 1 | None | Land (Nothing else but land) |
| 2 | None | Ocean and lake shorelines |
| 3 | None | Shallow inland water |
| 4 | None | Ephemeral water |
| 5 | None | Deep inland water |
| 6 | None | Moderate or continental ocean |
| 7 | None | Deep ocean |
Snow_BRDF_Albedo Class Table
| Value | Color | Description |
|---|---|---|
| 0 | None | snow-free albedo retrieved |
| 1 | None | snow albedo retrieved |
Terms of Use
Terms of Use
LP DAAC NASA data are freely accessible; however, when an author publishes these data or works based on the data, it is requested that the author cite the datasets within the text of the publication and include a reference to them in the reference list.
Citations
Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.
DOIs
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.ImageCollection('NOAA/VIIRS/001/VNP43IA2') .filter(ee.Filter.date('2021-06-01', '2021-06-03')); var visualization = { bands: ['BRDF_Albedo_ValidObs_I1'], min: 35550, max: 45535, palette: [ '000080', '0000d9', '4000ff', '8000ff', '0080ff', '00ffff', '00ff80', '80ff00', 'daff00', 'ffff00', 'fff500', 'ffda00', 'ffb000', 'ffa400', 'ff4f00', 'ff2500', 'ff0a00', 'ff00ff', ] }; Map.setCenter(89, 58, 6); Map.addLayer(dataset, visualization, 'Days of valid observation for band I1');