Initial results from retracking and reprocessing the ERS-1 geodetic mission altimetry for gravity field purposes -- Evaluation of Airborne Gravimetry Integrating GNSS and Strapdown INS Observations -- Status of the European Gravity and Geoid Project EGGP.-Photon Counting Airborne Laser Swath Mapping (PC-ALSM) -- A comparison of different isostatic models applied to satellite gravity gradiometry…