The ITSG-Grace2016 gravity field model is the latest GRACE only gravity field model computed in Graz, providing unconstrained monthly and Kalman smoothed daily solutions. It covers the whole GRACE time span from 2002-04 and will be continually updated.
When using ITSG-Grace2016 data , please cite:
Mayer-Gürr, Torsten; Behzadpour, Saniya; Ellmer, Matthias; Kvas, Andreas; Klinger, Beate; Zehentner, Norbert (2016): ITSG-Grace2016 - Monthly and Daily Gravity Field Solutions from GRACE. GFZ Data Services. http://doi.org/10.5880/icgem.2016.007