VIIRS NASA Data Dictionary

• Acquisition Date
• Agency
• Coordinates Decimal Degrees
• Coordinates Degrees, Minutes, Seconds
• Data Type
• Datum
• Entity ID
• Map Projection
• Satellite
• Sensor
   

Acquisition Date

• Field Definition:  The year, month, and day of data acquisition.

                  Format:
                  YYYY-MM-DD

Agency

• Field Definition:  NASA is the organization associated with the production of the VIIRS NASA data set.
   

Coordinates Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees for the following fields:
  
  Coordinates in decimal degrees for the following fields:
  
  Scene Center Latitude and Longitude
  Northeast (NE) Corner Latitude and Longitude
  Northwest (NW) Corner Latitude and Longitude
  Southeast (SE) Corner Latitude and Longitude
  Southwest (SW) Corner Latitude and Longitude
  
  Latitude Format Decimal Degrees: -90.000 through 90.000
  Longitude Format Decimal Degrees: -180.000 through 180.000
  
  Number of decimal places will vary by dataset - check collection in EarthExplorer.
   

Coordinates Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude are provided in degrees, minutes, and seconds for the following fields:
  
  Scene Center Latitude and Longitude
  Northeast (NE) Corner Latitude and Longitude
  Northwest (NW) Corner Latitude and Longitude
  Southeast (SE) Corner Latitude and Longitude
  Southwest (SW) Corner Latitude and Longitude
  
  Longitude Format:
  DDDMMSS.SSH
  DDD = Degree(s) with a range of 0 through 180
  MM = Minute(s) with a range of 0 through 59
  SS.SS = Second(s) with a range of 0 through 59.99
  H = Hemisphere with E for east and W for west
  
  Latitude Format:
  DDMMSS.SSH
  DD = Degree(s) with a range of 0 through 90
  MM = Minutes(s) with a range of 0 through 59
  SS.SS = Second(s) with a range of 0 through 59.99
  H = Hemisphere with N for north and S for south
   

Data Type

• Field Definition:  This module provides operations on both 32-bit and 16-bit. The type int32 is guaranteed to be exactly 32-bit wide on all platforms. The Visible and Near-Infrared bands are 16-bit integer and the NDVI band is 32-bit integer.

               Values:
               INT16, INT16, INT32
 

Datum

• Field Definition:  The Datum associated with the product.

               Values:
               WGS84
 

Entity ID

• Field Definition:  A unique file name assigned to identify each individual image.

               Format:
               NSNPPVIIRSTOCNDVIYYYYMMDD

               NS = Agency Identifier
               NPP = Satellite
               VIIRS = Sensor
               TOC = Reflectance (Top Of Canopy (TOC)
               NDVI = Normalized Difference Vegetation Index
               YYYYMMDD = Year, Month, Day of Acquisition

               Example:
               NSNPPVIIRSTOCNDVI20130531
 

Map Projection

• Field Definition:  The reference system used to map the data.

               Values:
               GEOGRAPHIC
 

Satellite

• Field Definition:  The data are acquired by the NASA Suomi National Polar-orbiting Partnership (SUOMI_NPP) satellite.
   

Sensor

• Field Definition:  The Visible Infrared Imaging Radiometer Suite (VIIRS) sensor is the instrument used to acquire the data.