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CH_DNS_ACC_2_CH_TEC_TMS_2FCH_WND_ACC_2_CS_MAGGF_DNSxACC_2_GF_NE__KBR_2FGF_TECxTMS_2FGF_WNDxACC_2_GFx_FGM_ACAL_CORRGO_MAG_ACAL_CORRGR_DNSxACC_2_GR_NE__KBR_2FGR_TECxTMS_2FGR_WNDxACC_2_GRACE_x_MAGMM_CON_EPH_2_SW_ACCx_AE_2_SW_ACCxCAL_2_SW_ACCxPOD_2_SW_AEJxLPL_2FSW_AEJxLPS_2FSW_AEJxPBL_2FSW_AEJxPBS_2FSW_AOBxFAC_2FSW_ASMxAUX_1BSW_ASMxBUR_1BSW_AUXxORBCNTSW_CFW_SHA_2YSW_DNSxACC_2_SW_DNSxPOD_2_SW_EEFxTMS_2FSW_EFIx_LP_1BSW_EFIx_LP_FPSW_EFIx_LP_HMSW_EFIx_TCT02SW_EFIx_TCT16SW_EFIx_TII1BSW_EFIxIDM_2_SW_EFIxLPI_1BSW_EFIxTIE_2_SW_EFIxTISH1BSW_EFIxTISL1BSW_EGF_SHA_2_SW_FAC_LLS_2FSW_FAC_TMS_2FSW_FACxTMS_2FSW_GPSx_RN_1BSW_GPSx_RO_1BSW_GPSxNAV_1BSW_IBIxTMS_2FSW_IBP_CLI_2_SW_IPDxIRR_2FSW_LP_x_CA_1BSW_MAGx_CA_1BSW_MAGx_HR_1BSW_MAGx_LR_1BSW_MCO_SHA_2CSW_MCO_SHA_2DSW_MCO_SHA_2FSW_MCO_SHA_2XSW_MCO_SHA_2YSW_MCR_1DM_2_SW_MIN_1DM_2_SW_MIO_SHA_2CSW_MIO_SHA_2DSW_MIO_SHA_2ESW_MITx_LP_2FSW_MITxTEC_2FSW_MLI_SHA_2CSW_MLI_SHA_2DSW_MLI_SHA_2ESW_MMA_SHA_2CSW_MMA_SHA_2FSW_MODx_SC_1BSW_MTI_SHA_2CSW_NIX_TMS_2FSW_PC1xMAG_2FSW_PPIxFAC_2FSW_SC_xDYN_1BSW_SP3xCOM_2_SW_SP3xKIN_2_SW_STRxATT_1BSW_STRxEPF_1BSW_TECxTMS_2FSW_TIX_TMS_2FSW_ULFxMAG_2FSW_VFMxAUX_1BSW_VOBS_1M_2_SW_VOBS_4M_2_SW_WHIxEVT_2_

SW_EGF_SHA_2_

Full product name
Monthly gravity field of the Earth

Description

Monthly average of Earth's gravity field, i.e. with an implicit epoch located at the middle of the calendar month

Data Access

  • Files
    • HTTPS (Product files): https://swarm-diss.eo.esa.int/#swarm/Level2longterm/EGF
    • FTP (Product files): ftp://swarm-diss.eo.esa.int/Level2longterm/EGF

Details

Product identifier EGF_SHA_2_
Definition Monthly gravity field of the Earth
Input data GPSA_RO_1B, GPSB_RO_1B, GPSC_RO_1B, STRAATT_1B, STRBATT_1B, STRCATT_1B
Input time span 1 calendar month
Spatial representation Spherical harmonic coefficients
Time representation Monthly average of Earth's gravity field, i.e. with an implicit epoch located at the middle of the calendar month
Units See output data
Resolution 12 significant digits in scientific notation
Uncertainty Typically 1-2 mm geoid height or 1-2 cm Equivalent Water Height discrepancy w.r.t. GRACE over land areas during low solar activity periods, considering Gaussian smoothing with 750km spherical cap radius
Quality indicator RMS over ocean areas that are 6 degrees away from coast lines, after removing long-term trend, annual and semi-annual variations estimated from monthly un-weighted averages of numerous GRACE models (AIUB02, CSR05, GRGS03, ITSG14, GFZ05a, JPL05 and TNJ01)
Data volume 20 Kb
Data format ASCII file with Stokes Coefficients following the ICGEM-format (http://icgem.gfz-potsdam.de/ICGEM-Format-2011.pdf)
Output data Degree, order, cosine coefficient, sine coefficient (columns 5 and 6 set to zero)
Output time span 1 calendar month
Update rate Quarterly
Latency 5 months
Notes - Stokes coefficients available up to degree 40
 - No smoothing applied
 - GRACE comparison indicates that there is little useful geophysical signal above roughly degree 12, i.e. it suggest the signal-to-noise ratio drops below 1 at those degrees and above
 - Further product details in Swarm ITT1.1 TN-01
SW_EGF_SHA_2_
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