Effective Angular Momentum Functions from geodetic residuals (mass+motion term) File name : GAHS_GravIS_COSTG_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 -1.787016661652588e-09 -5.473582381222191e-08 4.455777498941085e-09 2017 02 15 00 57799.000 2.631280558174890e-09 7.182312850138926e-08 4.325727790043455e-09 2017 03 15 00 57827.000 2.994971067755067e-08 2.807086819813901e-08 4.273721690228348e-09 2017 04 15 00 57858.000 1.233468980868416e-07 -2.802630283522227e-09 4.785297542403716e-09 2017 05 15 00 57888.000 6.000453367984271e-08 4.546297697828459e-08 4.359875440644603e-09 2017 06 15 00 57919.000 -2.492319681299638e-08 4.152002027703869e-08 3.957968375170614e-09 2017 07 15 00 57949.000 -3.524580259000007e-08 8.856457925015484e-08 4.048201517667901e-09 2017 08 15 00 57980.000 2.068484842687578e-08 5.116640390864499e-08 3.718581672867056e-09 2017 09 15 00 58011.000 4.841099802647151e-08 2.789585505355672e-08 3.478724157188275e-09 2017 10 15 00 58041.000 2.693570746839045e-08 -2.624913524975986e-09 3.184301082674057e-09 2017 11 15 00 58072.000 2.625039196106607e-08 6.649703893872729e-08 2.924995590051517e-09 2017 12 15 00 58102.000 5.881151224112566e-09 2.647811113731745e-09 2.498488038617061e-09