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VNP09H1: VIIRS/NPP Surface Reflectance 8-Day L3 Global 500m SIN Grid V006


VNP09H1

VNP09H1. Acquired January 1, 2015. Tile H08V05. Western US.

DOI
10.5067/VIIRS/VNP09H1.001
ProductReflectance
DatasetS-NPP VIIRS
Dataset Version6
Pixel Size500
Temporal GranularityComposites
Spatial ExtentGlobal
Data AccessEarthdata Search Client, Reverb, DAAC2Disk, Data Pool

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 (S-NPP) VIIRS sensor for three imagery (I1, I2, I3) bands at nominal 500 meter resolution (~463 meter). The 500 meter dataset is derived through resampling the native 375 meter 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. Included in the product along with the three reflectance bands is a state quality assurance (QA) layer and a reflectance band quality layer. Validation at stage 1 is complete for VIIRS surface reflectance products.


Citation

PI Name: Eric Vermote (NASA GSFC)

DOI: 10.5067/VIIRS/VNP09H1.001

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Characteristics

Collection

Characteristic Description
Temporal Granularity 8-day
Temporal Extent  
Spatial Extent Global
File Size ~25 MB
Coordinate System Sinusoidal
Datum N/A
File Format HDF-EOS5
Geographic Dimensions 1200 km x 1200 km

 

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers 5
Columns/Rows 2400 x 2400
Pixel Size 500 m

 

Data Layer Characteristics

SDS Name Description Units Data Type Fill Value Valid Range Scale Factor
SurfReflect_I1

500 m Surface Reflectance Band I1 

 Reflectance 16 bit signed integer

-28672

-100 to 16000

 0.0001
SurfReflect_I2

500 m Surface Reflectance Band I2 

 Reflectance 16 bit signed integer

-28672

-100 to 16000

 0.0001
SurfReflect_I3

500 m Surface Reflectance Band I3 

 Reflectance 16 bit signed integer

-28672

-100 to 16000

 0.0001
SurfReflect_State_500m

500 m Reflectance State QA

 Bit Field 16-bit signed integer

65535

NA

 NA
SurfReflect_QC_500m

500 m Reflectance Quality Control

 Bit Field 16-bit unsigned integer

65535

0 to 32767

 NA

 

 

Product Quality

The bit field mappings for QC and State QA layers are provided in Section 3.3 Tables 17 and 19 of the User Guide.

For complete information about product quality, refer to the VIIRS Land Product Quality website.

 

Known Issues

Known issues for VIIRS Surface Reflectance data products can be found in Section 4.0 “Caveats and Known Problems” of the User Guide.

Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)

Tools

Data Access

Earthdata Search Client
Reverb
DAAC2Disk
Data Pool

Resources

E-Learning

Title Author Links
How to Reformat and Georeference VIIRS Surface Reflectance HDF-EOS5 Files LP DAAC Tutorial
R You Ready to Python? An Introduction to Working with Land Remote Sensing Data in R and Python LP DAAC Webinar, Presentation