Effective Angular Momentum Functions from geodetic residuals (mass+motion term) File name : GAHS_GravIS_GFZ_monthly_2018.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 : 15.01.2018, 00:00 UTC until 15.12.2018, 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 2018 01 15 00 58133.000 7.604211059657858e-08 6.896437370722576e-08 1.944083259436881e-09 2018 02 15 00 58164.000 9.446934259854695e-08 1.079183412465527e-07 1.738667222568601e-09 2018 03 15 00 58192.000 2.775724748457275e-08 1.006998500121768e-07 1.320600305430604e-09 2018 04 15 00 58223.000 1.078064854009797e-07 2.628585787020961e-08 1.346592535175364e-09 2018 05 15 00 58253.000 1.408162291454150e-08 -3.974849819318486e-08 1.147837550518524e-09 2018 06 15 00 58284.000 -6.946017269808960e-08 -2.816866911568346e-08 4.739034959400609e-10 2018 07 15 00 58314.000 4.779512579551476e-08 -1.387934092742790e-07 3.799665960413661e-10 2018 08 15 00 58345.000 3.006453336992711e-08 -9.363335637723328e-08 2.656932762896573e-11 2018 09 15 00 58376.000 1.023381952627596e-07 -4.501834362184018e-09 -4.993171839615089e-10 2018 10 15 00 58406.000 4.784641618173340e-08 -1.242213233142742e-07 -7.662010500750473e-10 2018 11 15 00 58437.000 3.443132343784822e-08 -4.673940562163581e-08 -1.269072891907767e-09 2018 12 15 00 58467.000 1.372164040094571e-08 -1.018776978057544e-07 -1.896180742811464e-09