AVHRR Composites Data Dictionary

 

Available Bands

• Field Definition:  The number of spectral bands contained in the image.

          Values:

          14

 

Coordinates - Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees 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

 

          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 EE.

 

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

 

Date Updated

• Field Definition:  The date the metadata record was added or last updated.

 

Datum

• Field Definition:  The horizontal reference system associated with the image.

          Values:

          19 = Sphere; US only

          0 = Clarke 1866; AK only

 

End Date

• Field Definition:  The last day of data acquisition for source data used to create the composite.

 

Entity ID

• Field Definition:  The naming convention of each scene is based on acquisition parameters.

          Format:

         DDRRYYYYSSSEEENN

         DD = Dataset Identifier

         RR = Composite Region where US = United States and AK = Alaska

         YYYY = Year of Composite

         SSS = Starting Julian day of composite

         EEE = Ending Julian day of composite

         NN = Number of Satellite

         Example:

         AAUS199219921216

 

Number of Days

• Field Definition:  The number of days of data acquisitions included in the composite.

          Values:

          4 = 4 Day Composite

          7 = 7 Day Composite

         14 = 14 Day Composite

         15 = 15 Day Composite

         16 = 16 Day Composite

 

Projection

• Field Definition:  The method used to represent the 3-dimensional surface of the earth.

          Values:

          11 = Lambert Azimuthal Equal Area

          3 = Albers Conical Equal Area

 

Region

• Field Definition:  The area covered in the composite.

          Values:

          AK = Alaska

          US = United States

 

Satellite

• Field Definition:  The number of the NOAA satellite carrying the AVHRR sensor that acquired the source data.

          Example:

          11 = NOAA-11

          19 = NOAA1-9

 

Start Date

• Field Definition:  The first day of data acquisition for the source data used to create the composite.

 

Year of Composite

• Field Definition:  The acquisition year refers to the year in which the source data for the composite were acquired.