TNO Intern

Commit 990b770e authored by Arjo Segers's avatar Arjo Segers
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Updated documentation.

parent 977676fa
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@@ -310,6 +310,27 @@ give warnings from the CF-compliance checker::
  cso.s5p.chocho.convert.output.var.latitude.from                    :   PRODUCT/latitude
  cso.s5p.chocho.convert.output.var.latitude.attrs                   :   { 'bounds' : None }

The pixel boundaries are necessary to know the exact footprint of a pixel,
which is for example used when averaging over a grid or simulation from a model.
These are available in the input files, but without a ``units`` attribute as these
are implied by the pixel center coordinate; the conversion therefore requires that
units are defined explicitly.
For the ``longitude_bounds`` a special processing is needed for pixels crossing the dateline,
as the original data simply uses longitudes modulo 360 degrees::

  ! corner longitudes; no units in file:
  cso.s5p.chocho.convert.output.var.longitude_bounds.dims            :   pixel corner
  cso.s5p.chocho.convert.output.var.longitude_bounds.from            :   PRODUCT/SUPPORT_DATA/GEOLOCATIONS/longitude_bounds
  cso.s5p.chocho.convert.output.var.longitude_bounds.units           :   degrees_east
  ! ensure that near dateline the corners form a convex region around center
  ! (with some points outside [-180,+180] if necessary)
  cso.s5p.chocho.convert.output.var.longitude_bounds.special         :   longitude_bounds

  ! corner latitudes, no units in file:
  cso.s5p.chocho.convert.output.var.latitude_bounds.dims             :   pixel corner
  cso.s5p.chocho.convert.output.var.latitude_bounds.from             :   PRODUCT/SUPPORT_DATA/GEOLOCATIONS/latitude_bounds
  cso.s5p.chocho.convert.output.var.latitude_bounds.units            :   degrees_north

Also the locations of the pixels in the original track are copied,
since these are useful when creating plots. These cannot be copied directly but require special processing::

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