Visible Infrared Imaging Radiometer Suite (VIIRS) NOAA Data Dictionary

Acquisition Date

• Field Definition:  The year, month, and day of data acquisition.
  
     Format:
     YYYY-MM-DD
   

Agency

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

Coordinates Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees for the following fields:

                 Values:
                 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:

                 Values:
                 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 INT32 and INT16 bit integers. 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:
                 NONPPVIIRSTOANDVIYYYYMMDD
                 NO = Agency NOAA
                 NPP = Satellite
                 VIIRS = Sensor
                 TOA = Reflectance (Top of Atmosphere)
                 NDVI = Normalized Difference Vegetation Index
                 YYYYMMDD = Year, Month, Day of Acquisition

                 Example:
                 NONPPVIIRSTOANDVI20130531
 

Map Projection

• Field Definition:  The projection used to map the data.

                 Values:
                 GEOGRAPHIC
 

Satellite

• Field Definition:  The data are acquired by the 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.