Effective Angular Momentum Functions from geodetic residuals (mass+motion term) File name : GAHS_GravIS_COSTG_monthly_2008.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 : 15.01.2008, 00:00 UTC until 15.12.2008, 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 2008 01 15 00 54480.000 -4.757294909109569e-08 1.061580828610801e-07 6.674249475743181e-09 2008 02 15 00 54511.000 -3.259558162263859e-08 9.259226831417053e-08 6.496919380063051e-09 2008 03 15 00 54540.000 -3.448249124726698e-08 1.206525089280831e-07 6.466758972892076e-09 2008 04 15 00 54571.000 -6.710304261945761e-09 6.944936826737353e-08 5.685406263137549e-09 2008 05 15 00 54601.000 -3.931054233642109e-08 1.445045229125373e-07 5.963158719728059e-09 2008 06 15 00 54632.000 -2.010968988320178e-08 9.542005322405658e-08 6.076827490449081e-09 2008 07 15 00 54662.000 7.091363734273606e-09 1.081589808444867e-07 5.895539788033301e-09 2008 08 15 00 54693.000 -2.149439146366397e-08 6.386085338857562e-08 5.245418724060937e-09 2008 09 15 00 54724.000 -3.744276296840467e-08 4.937064185252003e-08 5.615247799297890e-09 2008 10 15 00 54754.000 2.619366339364170e-08 3.248029990873297e-08 5.401477907646399e-09 2008 11 15 00 54785.000 6.384352544252200e-08 1.005009450327696e-07 5.334862102136411e-09 2008 12 15 00 54815.000 -7.358187234692682e-08 7.330770841397793e-08 5.076080488615978e-09