Effective Angular Momentum Functions from geodetic residuals (mass+motion term) File name : GAHS_GravIS_COSTG_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 8.506103822670122e-08 6.225846486513265e-08 1.977643559544532e-09 2018 02 15 00 58164.000 1.022866884936819e-07 1.008030054341821e-07 1.760252175138628e-09 2018 03 15 00 58192.000 3.625281107214021e-08 9.337645854409647e-08 1.319976065462695e-09 2018 04 15 00 58223.000 1.170879176759157e-07 1.794658303886731e-08 1.340276615784475e-09 2018 05 15 00 58253.000 2.328975812903609e-08 -5.027202786988811e-08 1.187067801204179e-09 2018 06 15 00 58284.000 -7.085953581398506e-08 -4.768237693364073e-08 4.089378965073375e-10 2018 07 15 00 58314.000 6.096359398978928e-08 -1.410800283999881e-07 5.125650810598696e-10 2018 08 15 00 58345.000 3.455363791394422e-08 -1.032929033467525e-07 3.113591452520947e-10 2018 09 15 00 58376.000 1.087163534040239e-07 -1.007064213400505e-08 -2.508102974177216e-10 2018 10 15 00 58406.000 7.182363482417837e-08 -1.126131320107908e-07 -6.147866475459641e-10 2018 11 15 00 58437.000 5.198721803221778e-08 -5.660794518771623e-08 -1.064880179026066e-09 2018 12 15 00 58467.000 2.312635600102108e-08 -9.948031896766104e-08 -1.684200314980503e-09