SIR-C (Spaceborne Imaging Radar C-band) Survey Data Dictionary

Acquisition Date

• Field Definition:  The year, month, and day the image was acquired.

               Format:
               YYYY/MM/DD
 

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
 

Data Take ID

• Field Definition:  The reference number assigned to a Data Take (swath) of raw data.

               Values:
               1.00 - 999.99
 

Entity ID

• Field Definition:  The naming convention of each image (segment) is based on acquisition parameters.
  
  For records with Segment IDs less than 100:
  Format:
  SSSDDD_DDRRRRRYYYYMMDDhhmmssII
  SSS = Site ID
  DDD_DD = Data Take ID
  RRRRR = Processing Run Number
  YYYYMMDD = Scene Center Acquisition Date ( Year, Month, Day)
  hhmmss = Scene Center GMT Acquisition Time (Hours, Minutes, Seconds)
  II = Segment ID
  
  Example:
  G11080_10101681994041407574302
  
  For records with Segment IDs of 100+:
  Format:
  SSSDDD_DDRRRRRYYYYMMDDhhmm_III
  SSS = Site ID
  DDD_DDD = Data Take ID
  RRRRR = Processing Run Number
  YYYYMMDD = Scene Center Acquisition Date ( Year, Month, Day)
  hhmm = Scene Center GMT Acquisition Time (Hours, Minutes)
  III = Segment ID
  
  Example:
  GS7156_2040862199410100053_112
   

Frequency

• Field Definition:  The radar frequency used to acquire the data.

               Values:
               C-Band (5.8 cm)
               L-Band (23.5 cm)
 

Mission

• Field Definition:  This field indicates the flight campaign associated with the data.

               Values:
               SRL1 - April 9, 1994 to April 20, 1994
               SRL2 - September 30, 1994 to October 11, 1994
 

Orbit Direction

• Field Definition:  The direction of the shuttle flight path at the time of data acquisition.

               Values:
               Ascending
               Descending
 

Polarization

• Field Definition:  The code used to indicate the TX (transmit) and RX (receive) polarization where H = Horizontal and V = Vertical.

              Values:
              HH
              VV
 

Site Name

• Field Definition:  The name of the target site (area of interest) associated with the Data Take (swath).