USGS ALOS PALSAR 1.1 and 1.5 Data Dictionary

 

 

Acquisition Date

• Field Definition:  The date the image was acquired.

                 Format:

                 YYYY/MM/DD

 

ADC Sampling Rate

• Field Definition:  ADC Sampling Rate of the image.

                 Values:

                 16MHz or 32MHz

 

Azimuth Angle

• Field Definition:  Direction of the flight of the SAR System.
  
   

Azimuth Deskew

• Field Definition:  Specifies the SLC image is deskewed to zero-doppler.
  
   

Azimuth Line Time

• Field Definition:  Azimuth Line Time showned in decimal seconds.
  
   

Azimuth Lines

• Field Definition:  Number of lines along the azimuth direction.
  
   

Azimuth Looks

• Field Definition:  The number of azimuth looks applied during azimuth mulit-looking.
  
   

Azimuth Pixel Spacing

• Field Definition:  Specifies the image azimuth pixel spacing along the azimuth direction.
  
   

Azimuth Product Bandwidth

• Field Definition:  Specifies the total multi-look bandwidth.
  
   

Azimuth Scale Factor

• Field Definition:  Azimuth Scale Factor associated with the image.
  
   

Center Range SLC

• Field Definition:  Number of samples to extend the swath in the center range; Single Look Complex Images only.
  
   

Center Time

• Field Definition:  Year, Month, Day, Hour, Minute, second the center of scene was collected.
  
  The value for all ALOS PALSAR 1.5 scenes are 0.
  
   

CHIRP Bandwidth

• Field Definition:  The CHIRP (pulse compression radar technique) Bandwidth.
  
   

Coordinates - Decimal Degrees

• Field Definition:  The latitude and longitude of the scenes point cloud data in decimal degrees.

                 Values:

                 Coordinates in decimal degrees for following fields:

                 Scene Center Latitude and Longitude

                 NE Corner Latitude and Longitude

                 NW Corner Latitude and Longitude

                 SE Corner Latitude and Longitude

                 SW Corner Latitude and Longitude

                 Latitude Format Decimal Degrees:

                -90 - 90

                 Longitude Format Decimal Degrees:

                -180 - 180

 

Coordinates - Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude of the scenes point cloud data.

                 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 Entered

• Field Definition:  Date the data was entered into collection.

                 Format:

                 Year, Month, Day

 

Date Updated

• Field Definition:  Date of most recent update to data in a specific record in the collection.

                 Format:

                 Year, Month, Day

 

End Time

• Field Definition:  Year, Month, Day, Hour, Minute, second the last line of scene was collected.
  
   

Entity ID

• Field Definition:  This field uniquely identifies the individual scene.

                 Values:

                 Example 1_20060610_02010_7150_1

                Valid Format:

                1 = ALOS PALSAR 1.1; 5 = ALOS PALSAR 1.5

                2006 = Year

                06 = Month

                10 = Day

                02010 = Orbit Number

                7150 = Starting frame number

                0510 = Ending frame number

                1 = Version Number

 

Far Range SLC

• Field Definition:  Number of samples to extend the swath in the far range; Single Look Complex images only.
  
   

Frame Number

• Field Definition:  The frame number assigned to the image.
  
   

Heading

• Field Definition:  Heading consists of a 8.5 numeric value.
  
   

Image Format

• Field Definition:  Image Format

                 Values:

                 FCOMPLEX for ALOS PALSAR 1.1 data

                 FLOAT for ALOS PALSAR 1.5 data

 

Image Geometry

• Field Definition:  Image Geometry.

                 Values:

                 Slant Range Geometry for ALOS PALSAR 1.1 data

                 Geocoded Geometry for ALOS PALSAR 1.5 data

 

Incidence Angle

• Field Definition:  Incidence Angle value.data

                 Values:

                 7.5 Numeric value for ALOS PALSAR 1.1 data

                 0 value for ALOS PALSAR 1.5 data

 

Line Header Size

• Field Definition:  The size of the Line Header.
  
   

Near Range SLC

• Field Definition:  Number of samples to extend the swath in the near range; Single Look Complex images.
  
   

Number of State Vectors

• Field Definition:  Number of State vectors associated with the image.
  
   

Orbit Number

• Field Definition:  Number of orbit.
  
   

Polarization

• Field Definition:  Specifies the polarization type of image.

                 Values:

                 HH = Horizontal transmit and Horizonal receive

                 HH,HV = Horizontal transmit and Horizonal receive, Horizonal transmit and vertical receive

                 HH,HV,VH,VV = Horizontal transmit and Horizonal receive, Horizonal transmit and vertical receive, Vertical transmit and horizonal receive, Vertical transmit and vertical receive

 

PRF

• Field Definition:  The pulse repetition frequency (PRF) pertaining to the image.
  
   

Radar Frequency

• Field Definition:  The Radar Frequency for both 1.1 and 1.5 data is 1.270E+09?????????.
  
   

Range Looks

• Field Definition:  Number of range looks per sub-aperture.
  
   

Range Pixel Spacing

• Field Definition:  Specifies the pixel spacing in the range direction.
  
   

Range Samples

• Field Definition:  Number of samples in the range direction.
  
   

Range Scale Factor

• Field Definition:  The typical range scale factor of 1.
  
   

Receiver Gain

• Field Definition:  Receiver Gain for ALOS PALSAR 1.1 is 24. No value given for 1.5.
  
   

Start Time

• Field Definition:  Year, Month, Day, Hour, Minute, second the first line of scene was collected.
  
   

Time of First State Vector

• Field Definition:  The satellite time of the first state vector.