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The sea-ice thickness processing chain generates higher level data products (such as maps) from measurements along the ground track of the satellite. Sea-ice thickness information is therefore available at different data levels that differ in the extent and resolution of the corresponding dataset.

Table of Contents
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Single Orbit


Data LevelLevel-2 Intermediate (L2i)
Data PeriodIndividual (for each orbit segment)
SummaryGeophysical variables and error flags at full resolution of the altimeter (typically 300 meter).
ParametersAll fields are per single altimeter data point
  • time-orbit (time, longitude, latitude)
  • geophysical parameters and their uncertainties
  • flag (surface_type, radar mode)
Info

l2i data products are not publically available due to their data volume but can be made available upon request

Image Added

Figure: Example of sea-ice thickness along a single orbit at along-track resolution


Daily Trajectory Summary
Anchor
l2p-trajectory-doc
l2p-trajectory-doc

l2p-awi-seaice-{mission_id}-{timeliness}-{hemisphere}-{yyyy}{mm}{dd}-{version}.nc
Data LevelLevel-2 Post-Processed (L2P)
Data PeriodDaily (between 00:00:00 and 23:59:59.999 UTC)
AvailabilityCryoSat: version 2.0+Data Format

netCDF v4

(Climate and forecast  conventions)

Filenaming
Summary

Collection of daily along-track geophysical parameters and their uncertainties at full resolution of the altimeter (typically 300 meter).  

Product only includes data points with valid freeboard measurements, though the point spacing of the data is potentially irregular.

ParametersAll fields are per single altimeter data point
.

  • time
  • longitude
  • latitude
  • radar mode
  • radar freeboard + uncertainty
  • freeboard + uncertainty
  • snow depth + uncertainty
  • snow density + uncertainty
  • sea ice type + uncertainty
  • sea ice thickness + uncertainty
  • Image Removed

    • -orbit (time, longitude, latitude)
    • geophysical parameters and their uncertainties
    • flag (radar mode)

    Daily L2P product exampleImage Added

    Figure: Example of daily sea-ice thickness point measurements at along-track resolution


    Space-Time Grid

    Anchor
    l3c-grid-doc
    l3c-grid-doc

    Weekly Gridded

    Data Level

    Level-3 Colocated (L3C)

    Data Period

    Weekly (

    between

    Monday 00:00:00 and Sunday 23:59:59.999 UTC)

    AvailabilityCryoSat: version 2.0+
    Data Format

    netCDF v4

    (Climate and forecast  conventions)

    Monthly (between 00:00:00 first day and 23:59:59.999 UTC last day of the month)

    Custom (between 00:00:00 first day and 23:59:59.999 UTC last day)

    SummaryGridded SummaryWeekly gridded geophysical parameters, their uncertainties, retrieval area statistics and flags
    Grid

    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)

    ParametersAll fields are per single altimeter data point.
    • time
    • longitude
    • latitude
    • radar mode
    • radar freeboard + uncertainty
    • freeboard + uncertainty
    • snow depth + uncertainty
    • snow density + uncertainty
    • sea ice type + uncertainty
    • sea ice thickness + uncertainty

    Image Removed

    Monthly Gridded
    on a space-time grid
    ParametersAdd variables are given per grid cell, except time bound and reference time
    • geolocation (longitude/latitude, projection coordinates)
    • geophysical parameters and their uncertainties
    • grid cell statistics (number of points, surface type detection fractions, ....)
    • flags (retrieval status & quality flag)
    • land mask and region code

    Weekly Gridded (L3C) data exampleImage Added

    Figure: Example of weekly gridded sea-ice thickness product

    Monthly gridded (L3C) data exampleImage Added

    Figure: Example of monthly gridded sea-ice thickness product