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Daily Trajectory Summary
Data Level | Level-2 Post-Processed (L2P) |
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Data Period | Daily (between 00:00:00 and 23:59:59.999 UTC) |
Summary | Collection of daily along-track geophysical parameters and their uncertainties at full resolution of the altimeter. Product only includes data points with valid freeboard measurements. |
Parameters | All fields are per single altimeter data point.
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Figure: Example of daily sea-ice thickness point measurements at along-track resolution
Space-Time Grid
Data Level | Level-3 Colocated (L3C) | ||
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Data Period | Weekly ( betweenMonday 00:00:00 and Sunday 23:59:59.999 UTC) Monthly (between 00:00:00 first day and 23:59:59.999 UTC last day of the month) | ||
Summary | Gridded | Summary | Weekly gridded geophysical parameters, their uncertainties, retrieval area statistics and flags |
Parameters | Time / Geolocation:
Geophysical fields (per grid cell)
Flags (per grid cell)
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Figure: Example of weekly gridded sea-ice thickness product
Figure: Example of monthly gridded sea-ice thickness product
Monthly Gridded
CryoSat version 1.2 (different file format)
CryoSat version 2.0+
netCDF v4 (Climate and forecast conventions)
l3c-awi-seaice-{mission}-{timeliness}-{grid}-{yyyy}{mm}{dd}-{version}.nc
(e.g. l3c-awi-seaice-cryosat2-ntc-nh25kmEASE2-201011-fv2.0.nc)
EASE-2 North (Lambert Azimuthal Equal Area)
Projection:
+proj=laea +lon_0=0 +datum=WGS84 +ellps=WGS84 +lat_0=90.0
Resolution: 25 km (Arctic)
- longitude (grid cell center notation)
- latitude (grid cell center notation)
- grid x position in projection coordinates
- grid y position in projection coordinates
- time bounds
- reference time
Geophysical fields (per grid cell)
- mean sea surface
- sea ice concentration
- sea surface anomaly + uncertainty
- radar freeboard + uncertainty
- freeboard + uncertainty
- snow depth + uncertainty
- snow density + uncertainty
- sea ice type + uncertainty
- sea ice thickness + uncertainty
Flags (per grid cell)