An overview of all CryoSat-2 data products, that have been provided by the individual data centres for the SIMRE exercise, is given in Data and Metadata Descryption Document (D2.2).  The source code for parsing the different input files for both orbit and regional data sets is available via the pysimre python software module ( In addition to the Cryosat-2 data, the project used validation data based on data from the ESA CryoVal-SI project. The reconciled thickness estimate is based on the ensemble mean of 4 different CryoSat-2 sea ice thickness sources:

  2. AWI
  3. JPL
  4. ESA CCI Climate Data Record

The airborne validation data set consists of thickness measurements from:

  1. Airborne Electro-Magnetic (AEM) induction soundings collected during CryoSat Validation Experiments (CryoVEx) from years between 2011 and 2012
  2. Estimated sea ice thickness from airborne laser freeboard and radar snow depth collected from the NASA Operation IceBridge (OIB) program.

Both validation datasets are collocated with CryoSat-2 acquisition in space and time and were gridded into the same ensemble location as the CryoSat-2 SIMRE data.

Table: List of Cryosat-2 source data sets for SIMRE exercise.

Source ID Version Orbit Regional Reference
1. AWI v1.2 Yes Yes Hendricks, S. , Ricker, R. and Helm, V. (2016): User Guide – AWI CryoSat-2 Sea Ice Thickness Data Product (v1.2),
2.UCL/CPOM Yes Yes Rachel L. Tilling, Andy Ridout, Andrew Shepherd, Estimating Arctic sea ice thickness and volume using CryoSat-2 radar altimeter data, In Advances in Space Research, 2017
3.JPL v1.0 Yes Yes R. Kwok, G. F. Cunningham, Variability of Arctic sea ice thickness and volume from CryoSat-2, Phil. Trans. R. Soc. A 2015 373 20140157; DOI: 10.1098/rsta.2014.0157
4.NASA GSFC v1.0 No Yes Kurtz, N. T., Galin, N., and Studinger, M.: An improved CryoSat-2 sea ice freeboard retrieval algorithm through the use of waveform fitting, The Cryosphere, 8, 1217-1237,, 2014.
5.ESA CCI v2.0RC Yes Yes Algorithm Theoretical Basis Document, v2.2, ESA Climate Change Initiative on Sea Ice (SICCI)
6.CryoSat-2 / SMOS v1.3 No Yes Ricker, R., Hendricks, S., Kaleschke, L., Tian-Kunze, X., King, J., and Haas, C.: A weekly Arctic sea-ice thickness data record from merged CryoSat-2 and SMOS satellite data, The Cryosphere, 11, 1607-1623, 2017.
7.LEGOS v0.1 No Yes Guerreiro, K., Fleury, S., Zakharova, E., Kouraev, A., Rémy, F., and Maisongrande, P.: Comparison of CryoSat-2 and ENVISAT radar freeboard over Arctic sea ice: toward an improved Envisat freeboard retrieval, The Cryosphere, 11, 2059-2073, 2017. (