SLR, GRACE and Swarm Gravity Field Determination and Combination Meyer, Ulrich ; Sosnica, Krzysztof ; Arnold, Daniel ; Dahle, Christoph ; Thaller, Daniela ; Dach, Rolf ; Jäggi, Adrian Abstract Publication: Remote Sensing Pub Date: April 2019 DOI: 10.3390/rs11080956 Bibcode: 2019RemS...11..956M