The ESA Permanent Facility for Altimetry Calibration in Crete: Advanced Services and the Latest Cal/Val Results. - Stelios P. Mertikas; Craig Donlon; Costas Kokolakis; Dimitrios Piretzidis; Robert Cullen; Pierre Féménias; Marco Fornari; Xenophon Frantzis; Achilles Tripolitsiotis; Jérôme Bouffard; Alessandro Di Bella; François Boy; et al. (Remote. Sens., 2024)