Dahle, C., Flechtner, F., Murböck, M., Michalak, G., Neumayer, K., Abrykosov, O., Reinhold, A., König, R. (2018): GRACE 327-743 (Gravity Recovery and Climate Experiment): GFZ Level-2 Processing Standards Document for Level-2 Product Release 06 (Rev. 1.0, October 26, 2018), (Scientific Technical Report STR - Data ; 18/04), Potsdam : GFZ German Research Centre for Geosciences, 20 p.https://doi.org/10.2312/GFZ.b103-18048