Define format for range-range velocity pair

[mliukis]

New format for the range-range velocity pair:

• chip_size_height
  [maximum value across the two input granules]

  • Propagate NaN's

• chip_size_width
  [maximum value across the two input granules]

  • Propagate NaN's

• chip_size_height:azimuth_pixel_size and chip_size_width:range_pixel_size

  • We are only using chip_size_width:range_pixel_size
  • Take the maximum chip_size_width:range_pixel_size and use that to populate both:
    chip_size_height:azimuth_pixel_size and chip_size_width:range_pixel_size

• img_pair_info attributes (attributes that become data arrays in datacubes):
  NOTE: granule 1 is the one with the earliest mid date

  • acquisition_date_img1
    [minimum acquisition_date]

  • acquisition_date_img2
    [maximum acquisition_date]

  • date_center
    [average date_center]

  • date_dt
    [not sure about this one]

  • roi_valid_percentage
    [not sure about this one]

  • satellite_img1
    [just "1"]

  • satellite_img2
    [just "1"]

  • sensor_img1
    [granule 1 sensor_img1]
    * granule 1 is the one with the earliest mid date

  • sensor_img2
    [granule 2 sensor_img1]
    * granule 1 is the one with the earliest mid date

  • Centroid longitude and latitude

    • Compute based on new x and y extends.

  • id_img1/2 should reference the original granules, then much of the metadata gets filled with NaNs and the user needs to look at the original granules

  • flight_direction_img1/2 gets populated from the input granules as one granule will be ascending and the other descending.

  • mission_data_take_ID_img1/2 are NaN's

  • mission_img1/2 is always 'S'

• interp_mask
  [any interp_mask in granule 1 or granule 2]

• v_error
  [we need to propagate this from granule 1 or granule 2 range errors]

• vx and vy attributes (attributes that become data arrays in datacubes):
  [we need to propagate this from granule 1 or granule 2 range errors]

  error_modeled
  error_slow
  error_stationary
  stable_shift
  stable_shift_slow
  stable_shift_stationary

Notes:

• Do we keep M11, M12, va, vr?
  [NO]