Bertino, L., Cardellach, E., Catarino, N., Camps, A., Foti, G., Gommenginger, C., Park, H., Rius, A., Semmling, M., Soulat, F., Sousa, A., Wickert, J., Xie, J. (2015): Assessment of Requirements and Consolidation of Retrieval Algorithms (GARCA), (Progress Report 5, ESA-AO1-7850/14-GARCA-PR-5).