VNP09H1: VIIRS Surface Reflectance 8-Day L3 Global 500m

Dataset Availability: 2012-01-19T00:00:00Z–2024-10-23T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center
Earth Engine Snippet: ee.ImageCollection("NASA/VIIRS/002/VNP09H1")
Tags: daily nasa noaa npp reflectance sr viirs

Description

The 8-day Visible Infrared Imaging Radiometer Suite (VIIRS) Surface Reflectance (VNP09H1) Version 1 composite product provides an estimate of land surface reflectance from the Suomi National Polar-orbiting Partnership (Suomi NPP) VIIRS sensor for three imagery bands (I1, I2, I3) at nominal 500m resolution (~463m). The 500m dataset is derived through resampling the native 375m VIIRS resolution in the L2 input product. The data are corrected for atmospheric conditions such as the effects of molecular gases, including ozone and water vapor, and for the effects of atmospheric aerosols. Each pixel represents the best possible Level 2G observation during an 8-day period, which is selected on the basis of high observation coverage, low sensor angle, the absence of clouds or cloud shadow, and aerosol loading. The three reflectance bands, this product includes a state quality assurance (QA) layer and a reflectance band quality layer.

Documentation:

Bands

Resolution
500 meters

Bands

Name	Min	Max	Description
`SurfReflect_I1`	-100	16000	500 m Surface Reflectance Band I1
`SurfReflect_I2`	-100	16000	500 m Surface Reflectance Band I2
`SurfReflect_I3`	-100	16000	500 m Surface Reflectance Band I3
`SurfReflect_QC_500m`			Surface Reflectance Band Quality Control (QC)
Bitmask for SurfReflect_QC_500m Bits 0-1: MODLAND QA bits 0: Corrected product produced at ideal quality all bands 1: Corrected product produced at less than ideal quality some or all bands 2: Corrected product not produced due to cloud effects all bands 3: Corrected product not produced due to other reasons some or all bands may be fill value [Note that a value of (11) overrides a value of (01)]. Bits 2-3: Cloud State 0: Clear 1: Cloudy 2: Mixed 3: Not set, assumed clear Bits 4-7: Band 1 data quality four bit range 0: Highest quality 1: Noisy detector 2: Dead detector, data interpolated in L1B 3: Solar zenith >= 86 degrees 4: Solar zenith >= 85 and < 86 degrees 5: Missing input 6: Internal constant used in place of climatological data for at least one atmospheric constant 7: Correction out of bounds, pixel constrained to extreme allowable value 8: L1B data faulty 9: Not processed due to deep ocean or clouds Bits 8-11: Band 2 data quality four bit range 0: Highest quality 1: Noisy detector 2: Dead detector, data interpolated in L1B 3: Solar zenith >= 86 degrees 4: Solar zenith >= 85 and < 86 degrees 5: Missing input 6: Internal constant used in place of climatological data for at least one atmospheric constant 7: Correction out of bounds, pixel constrained to extreme allowable value 8: L1B data faulty 9: Not processed due to deep ocean or clouds Bit 12: Atmospheric correction performed 0: No 1: Yes Bit 13: Adjacency correction performed 0: No 1: Yes Bit 14: Different orbit from 500m 0: No 1: Yes
`SurfReflect_State_500m`			Surface Reflectance State Quality Assurance (QA)
Bitmask for SurfReflect_State_500m Bits 0-1: Cloud state 0: Clear 1: Cloudy 2: Mixed 3: Not set, assumed clear Bit 2: Cloud shadow 0: No 1: Yes Bits 3-5: Land/water flag 0: Shallow ocean 1: Land 2: Ocean coastlines and lake shorelines 3: Shallow inland water 4: Ephemeral water 5: Deep inland water 6: Continental/moderate ocean 7: Deep ocean Bits 6-7: Aerosol quantity 0: Climatology 1: Low 2: Average 3: High Bits 8-9: Cirrus detected 0: None 1: Small 2: Average 3: High Bit 10: Cloud shadow 0: No cloud 1: Cloud Bit 11: Internal fire algorithm flag 0: No Fire 1: Fire Bit 12: Snow/ice flag 0: No 1: Yes Bit 13: Pixel is adjacent to cloud 0: No 1: Yes Bit 14: BRDF correction performed 0: No 1: Yes Bit 15: Internal snow flag 0: No snow 1: Snow

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

DOIs

https://doi.org/10.5067/VIIRS/VNP09H1.002

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('NASA/VIIRS/002/VNP09H1')
                  .filter(ee.Filter.date('2017-05-01', '2017-06-30'));
var rgb = dataset.select(['SurfReflect_I1', 'SurfReflect_I2', 'SurfReflect_I3']);
var rgbVis = {
  min: 0.0,
  max: 1.0,
};
Map.setCenter(17.93, 7.71, 2);
Map.addLayer(rgb, rgbVis, 'RGB');

Open in Code Editor

VNP09H1: VIIRS Surface Reflectance 8-Day L3 Global 500m

NASA/VIIRS/002/VNP09H1, daily,nasa,noaa,npp,reflectance,sr,viirs

2012-01-19T00:00:00Z/2024-10-23T00:00:00Z

Google Earth Engine

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

https://doi.org/10.5067/VIIRS/VNP09H1.002