Level-2 product definition

Table 1, Table 2, Table 3 define the content (TBC) of the Level-2 sea-ice drift product files. Their structure is inspired by that of the EUMETSAT OSI SAF products.

Table 1 NetCDF Group: Processed data (TBC)

name	description	units	dimensions
crs	Definition of the EASE2 product grid	n/a	n/a
dX	Component of the drift along the X-axis of the EASE2 grid	m	(nx,ny)
dY	Component of the drift along the Y-axis of the EASE2 grid	m	(nx,ny)
lat_1	Latitude of the end point of the drift vector	degrees North	(nx,ny)
lon_1	Longitude of the end point of the drift vector	degrees East	(nx,ny)
sX	Uncertainty (one standard deviation) of the dX component	m	(nx,ny)
sY	Uncertainty (one standard deviation) of the dY component	m	(nx,ny)
cXY	Correlation between the uncertainty in dX and in dY	m	(nx,ny)
status_flag	A flag indicating status of retrieval, e.g. “nominal”, “over land”, “close to ice edge”, “over ocean”, “corrected from rogue vector”,…	n/a	(nx,ny)

Note

The CIMR Level-2 Sea Ice Drift product is an Earth-gridded product. The dimensions of each variable in the Level-2 file refer to the (nx,ny) dimensions of the product grid in an EASE2 polar projection (see Table 4).

Each data variable in the Processed data group holds conventional attributes following CF-1.7 or above:

Table 2 Standard variable attributes (TBC)

name	description
standard_name	A standard name that references a description of a variable”s content
long_name	A descriptive name that indicates a variable”s content
_FillValue	value that will appear in the dataset when the data is either missing or undefined
units	unit of measure

Table 3 Some global attributes in the Level-2 product files (TBC)

name	description
title	CIMR L2 Sea Ice Drift product
processing_level	Level-2
time_coverage_start	valid start time of the product
time_coverage_end	valid end time of the product
area	(Northern or Southern) Hemisphere
TBD	TBD