Effective Angular Momentum Functions from geodetic residuals (mass+motion term) File name : GAHS_GravIS_COSTG_monthly_2021.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 : 15.01.2021, 00:00 UTC until 15.12.2021, 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 2021 01 15 00 59229.000 6.358910359334862e-08 2.477002110206798e-09 -9.329890960897880e-09 2021 02 15 00 59260.000 4.837887344958389e-08 -8.038141121511615e-08 -9.700218425790660e-09 2021 03 15 00 59288.000 1.592646938660852e-07 -2.834219765567933e-08 -9.481756784218178e-09 2021 04 15 00 59319.000 7.116996524229307e-08 -1.349729191187262e-07 -8.629990440448725e-09 2021 05 15 00 59349.000 5.696365572404202e-08 -5.595431991685103e-08 -9.109683861717019e-09 2021 06 15 00 59380.000 2.854657210629557e-08 -7.845292441789331e-08 -9.512301723909022e-09 2021 07 15 00 59410.000 4.083935983791076e-08 -5.207234053095220e-08 -9.606097544322709e-09 2021 08 15 00 59441.000 2.957199161559545e-08 -1.780458414335874e-07 -9.525349417895822e-09 2021 09 15 00 59472.000 9.370729692790143e-08 -5.798996570282017e-08 -9.313241810139477e-09 2021 10 15 00 59502.000 9.724156837980413e-08 -5.133663209849634e-08 -9.430664545216416e-09 2021 11 15 00 59533.000 9.045489744630831e-08 -3.748072593058945e-08 -9.581223511483490e-09 2021 12 15 00 59563.000 8.595365247157226e-08 -1.330115827604509e-07 -9.353540355342704e-09