Effective Angular Momentum Functions from geodetic residuals (mass+motion term) File name : GAHS_GravIS_GFZ_monthly_2017.asc File contents : Effective angular momentum functions from geodetic excitation File units : dimensionless earth rotation excitation functions Issue date : 2026-10-27 References : Stumpe et al. (2027) Closing Mass-Consistent Earth Angular Momentum Budgets: Impact of Oceanic Excitation Uncertainty Contact : Lone Stumpe (stumpe@gfz.de), Robert Dill (dill@gfz.de) Affiliation : GFZ Helmholtz Centre for Geosciences, Potsdam, Germany, Section 1.3: Earth System Modelling Temporal domain : 15.01.2017, 00:00 UTC until 15.12.2017, 00:00 UTC Temporal resolution : monthly (GravIS epochs; GAM and AAM averaged over each epoch interval) Number of data records : 12 Subtracted mean values : mean of each component over total period of all yearly files Notes : These G-AHS data are constructed based on a set of consistently processed Earth rotation excitation functions and the geodetic angular momentum (GAM) derived from the 20 C04 series from the International Earth Rotation and Reference System Service (IERS) G-AHS = GAM - (AAM + HAM + SLAM). For the underlying excitation functions and the calculation of the GAM, see Stumpe et al. (2027) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- YYYY MM DD HH MJD G-AHS (mass + motion) x-component y-component z-component 2017 01 15 00 57768.000 -3.430293833101309e-09 -6.009592367953807e-08 4.424350163811518e-09 2017 02 15 00 57799.000 8.209299709806177e-09 8.234972550879547e-08 4.294978208543133e-09 2017 03 15 00 57827.000 2.866186886827009e-08 4.721781612684705e-08 4.241892820810698e-09 2017 04 15 00 57858.000 1.146346339124573e-07 1.024160898815029e-08 4.800745901711272e-09 2017 05 15 00 57888.000 5.958188973167902e-08 3.766803895697174e-08 4.475911761662935e-09 2017 06 15 00 57919.000 -2.929473018483770e-08 2.767730949668043e-08 3.792317615611080e-09 2017 07 15 00 57949.000 -3.280891314284974e-08 1.038071961558313e-07 3.819393228918373e-09 2017 08 15 00 57980.000 2.428728142445038e-08 6.299125095147923e-08 3.437977832916269e-09 2017 09 15 00 58011.000 5.069399247696480e-08 3.571071137333154e-08 3.217802582594662e-09 2017 10 15 00 58041.000 2.563401683896169e-08 1.399558453607162e-09 2.997933993460257e-09 2017 11 15 00 58072.000 2.016098991234302e-08 6.960764680958333e-08 2.822614658836537e-09 2017 12 15 00 58102.000 -3.560926432074558e-09 7.611930432008207e-09 2.448190736324734e-09