ATI Parameter Summary for at0046
               processed with interferometric baseline caf_caa
                         Fri Aug 27 22:29:38 PDT 2004

FILESET:

Filename:    at0046.caf_caa_par
Description: This parameter summary file.  (ASCII)

Filename:    at0046.cppp
Description: Complete list of processing parms.  (ASCII)

Filename:    at0046.caf_caa_intf1x6
Description: Slant-Range Interferogram
Records:      1814 C*8 samples,     11944 lines

Filename:    at0046.caf_caa-uwScc1x6
Description: Slant-Range Correlation File
Records:      1814 R*4 samples,     11936 lines

Filename:    at0046.caf-az1x6
Description: Slant-Range Multilook Image caf
Records:      1814 R*4 samples,     11944 lines

Filename:    at0046.caa-az1x6
Description: Slant-Range Multilook Image caa
Records:      1814 R*4 samples,     11944 lines

Filename:    at0046.caf_caa-uwWrp-sc10x10
Description: Ground-Projected Velocity Map and Image
Records:     2x877 R*4 samples,      4465 lines

Filename:    at0046.caf_caa-uwScc-sc10x10
Description: Ground-Projected Correlation File and Image
Records:     2x877 R*4 samples,      2232 lines

Filename:    at0046.caf_caa-uwWrp-sc10x10-inc
Description: Ground-Projected Incidence Angle Map and Image
Records:     2x877 R*4 samples,      2232 lines
==============================================================================

 Slant-Range Projection Information:

   7992.541 meters average platform altitude
   8869.189 meters range to first slant-range sample

   0.056698 meters radar wavelength

   3.331027 meters sample spacing
   3.847026 meters record spacing

   0.004457 seconds interferogram repeat time interval
   1.012294 meters/(seconds*radians) phase to velocity component conversion

Ground Map Projection Information:

 10.00 meter sample (C) spacing,
 10.00 meter record (S) spacing

 -22925.0 meters:  minimum S-coordinate in ground projected output
  23245.0 meters:  maximum S-coordinate in ground projected output
   3818.0 meters:  minimum C-coordinate in ground projected output
  12578.0 meters:  maximum C-coordinate in ground projected output

              Ground Map Coordinates
          Map Corner            Latitude Longitude
First Sample of First Record      17.331   -91.553
Last  Sample of First Record      17.508   -91.160
First Sample of Last Record       17.402   -91.588
Last  Sample of Last Record       17.580   -91.195

Caveats:

  This is the first flight season for which we are delivering ATI data.
The processor is still under development, and the calibration is not final.

  The current status of the processor is that only some of the calibration
parameters have been adequately determined.  In particular, there is an
arbitrary phase offset for each interferogram, and therefore an arbitrary
velocity offset in the velocity map.

  There is evidence of inadequate motion measurement and compensation,
as well as interferometric phase center alignment:  phase variations
along-track and a residual phase-ramp across the scene are seen in some
of the ATI data sets.

  Note that phase variations over land are expected due to topography:
along-track interferometric processing makes use of an elevation reference
for motion compensation.  Where this reference is not constant, there will
be motion compensation phase variations introduced.  The elevation reference
is constant over the ocean surface, so this artifact is unique to the land.

  There is no radiometric calibration for these data.