earth. Space. observation adjustmentFlechtner, Frank Observation of the System Earth from Space - CHAMP, GRACE, GOCE and Future Missions: Geotechnologien Science Report No. 20 / ed. Frank Flechtner ; ed. Nico Sneeuw, Wolf-Dieter Schuh. -- Berlin: Springer, 2014. -- 230 s. -- (Advanced Technologies in Earth Sciences). -- ISBN : 978-3-642-32134-4. -- ISSN : 2190-1635. Sneeuw, Nico. Schuh, Wolf-Dieter