Not listed CRYOSPHERIC TIDAL AND HYDROLOGIC INVERSIONS FROM GRACE AND GRACE-FO LEVEL-1 DATA AND MULTI-MISSION ALTIMETER DATAWE PROPOSE THREE NEW INNOVATIVE INVESTIGATIONS TO FURTHER ADVANCE THE SCIENCE RETURN OF THE GRACE AND GRACE FOLLOW-ON(GRACE-FO) MISSIONS: 1) OPTIMAL INVERSION OF A HIGH SPATIAL RESOLUTION LAND-ICE EVOLUTION MODEL FROM THE COMBINED REDUCTION OF DATA FROM GRACE GRACE-FO SATELLITE LASER RANGING (SLR) AND SPACEBORNE AND AIRBORNE LASER ALTIMETRY INCLUDING ICESAT-1 ICESAT-2 OPERATION ICE BRIDGE AND GLOBAL ECOSYSTEMS DYNAMICS INVESTIGATION (GEDI) 2) ESTIMATION OF TIDES FROM GRACE GRACE-FO AND SLR DATA AND THE SUBSEQUENT ASSIMILATION OF THOSE LONG-WAVELENGTH SOLUTIONS INTO A HIGH-RESOLUTION NUMERICAL HYDRODYNAMIC MODEL AND 3) OPTIMAL INVERSION OF EUSTATIC AND STERIC VARIABILITY OF INLAND AND MARGINAL SEAS FROM THE COMBINEDGRACE GRACE-FO SLR AND MULTI-MISSION RADAR ALTIMETER DATA.THE THREE INVESTIGATIONS ARE RELATED IN THAT THEY ALL LEVERAGE THE NASA GODDARD SPACE FLIGHT CENTER INFRASTRUCTURE AND EXPERTISE IN PROCESSING GRACE LEVEL-1B DATA AND IN ESTIMATING TIME-VARIABLE GRAVITY. MOREOVER EACH INVESTIGATION BENEFITS THE OTHER TWO WITHIMPROVED CORRECTIONS EITHER TIDAL OR NON-TIDAL AND THUS REDUCES OVERALL NOISE LEVELS AND LEAKAGE PROBLEMS. WHILE MANY PREVIOUS STUDIES HAVE COMBINED THE GRACE LEVEL-2 PRODUCTS WITH ALTIMETRY MEASUREMENTS FOR GEOPHYSICAL PROBLEMS SIMILAR TO THE ONES WE ADDRESS HERE NONE HAVE APPLIED THE LEVEL-1B RANGE-RATE OBSERVATIONS IN A RIGOROUS INVERSION PROCEDURE ACCOUNTING FOR THE FULL NOISECOVARIANCE AND ITERATING THE MODEL SOLUTIONS TO MINIMIZE THE OPTIMALLY WEIGHTED GRAVIMETRY AND ALTIMETRY OBSERVATIONS. THE PROPOSED METHOD SHOULD IMPROVE THE ACCURACY SPATIAL RESOLUTION AND ERROR CHARACTERIZATION OF LAND-ICE TIDE AND INLAND-SEA INVERSIONS. FOR THE LATTER THE GRAVITY-ALTIMETRY INVERSIONS EMPLOYING HIGH-RESOLUTION (MASCON) PARAMETERIZATIONS SHOULD REDUCE LEAKAGE PROBLEMS AND DISENTANGLE STERIC AND NON-STERIC PROCESSES. FOR LAND ICE THE APPROACH ALLOWS SIMILAR DISENTANGLING OF FIRN COMPACTION ICE DYNAMICS AND SURFACE MASS BALANCE PROCESSES. FOR TIDES THE GRAVITY-ONLY SOLUTIONS WILL BENEFIT ALL GRACE TEAMS PROCESSING LEVEL-1 DATA ANDTHE SUBSEQUENT ASSIMILATION SHOULD ESPECIALLY IMPROVE TIDE MODELS IN POLAR REGIONS WHERE HIGH-QUALITY DATA HAVE BEEN HISTORICALLY LACKING. $23.2k 5/22/19 3 CRYOSPHERIC, TIDAL, AND HYDROLOGIC INVERSIONS FROM GRACE AND GRACE-FO LEVEL-1 DATA AND MULTI-MISSION ALTIMETER DATA WE PROPOSE THREE NEW INNOVATIVE INVESTIGATIONS TO FURTHER ADVANCE THE SCIENCE RETURN OF THE GRACE AND GRACE FOLLOW-ON (GRACE-FO) MISSIONS: 1) OPTIMAL INVERSION OF A HIGH SPATIAL RESOLUTION LAND-ICE EVOLUTION MODEL FROM THE COMBINED REDUCTION OF DATA FROM GRACE, GRACE-FO, SATELLITE LASER RANGING (SLR), AND SPACEBORNE AND AIRBORNE LASER ALTIMETRY INCLUDING ICESAT-1, ICESAT-2, OPERATION ICE BRIDGE, AND GLOBAL ECOSYSTEMS DYNAMICS INVESTIGATION (GEDI) 2) ESTIMATION OF TIDES FROM GRACE, GRACE-FO, AND SLR DATA AND THE SUBSEQUENT ASSIMILATION OF THOSE LONG-WAVELENGTH SOLUTIONS INTO A HIGH-RESOLUTION NUMERICAL HYDRODYNAMIC MODEL AND 3) OPTIMAL INVERSION OF EUSTATIC AND STERIC VARIABILITY OF INLAND AND MARGINAL SEAS FROM THE COMBINED GRACE, GRACE-FO, SLR, AND MULTI-MISSION RADAR ALTIMETER DATA. THE THREE INVESTIGATIONS ARE RELATED IN THAT THEY ALL LEVERAGE THE NASA GODDARD SPACE FLIGHT CENTER INFRASTRUCTURE AND EXPERTISE IN PROCESSING GRACE LEVEL-1B DATA AND IN ESTIMATING TIME-VARIABLE GRAVITY. MOREOVER, EACH INVESTIGATION BENEFITS THE OTHER TWO, WITH IMPROVED CORRECTIONS, EITHER TIDAL OR NON-TIDAL, AND THUS REDUCES OVERALL NOISE LEVELS AND LEAKAGE PROBLEMS. WHILE MANY PREVIOUS STUDIES HAVE COMBINED THE GRACE LEVEL-2 PRODUCTS WITH ALTIMETRY MEASUREMENTS FOR GEOPHYSICAL PROBLEMS SIMILAR TO THE ONES WE ADDRESS HERE, NONE HAVE APPLIED THE LEVEL-1B RANGE-RATE OBSERVATIONS IN A RIGOROUS INVERSION PROCEDURE ACCOUNTING FOR THE FULL NOISE COVARIANCE AND ITERATING THE MODEL SOLUTIONS TO MINIMIZE THE OPTIMALLY WEIGHTED GRAVIMETRY AND ALTIMETRY OBSERVATIONS. THE PROPOSED METHOD SHOULD IMPROVE THE ACCURACY, SPATIAL RESOLUTION, AND ERROR CHARACTERIZATION OF LAND-ICE, TIDE, AND INLAND-SEA INVERSIONS. FOR THE LATTER, THE GRAVITY-ALTIMETRY INVERSIONS, EMPLOYING HIGH-RESOLUTION (MASCON) PARAMETERIZATIONS, SHOULD REDUCE LEAKAGE PROBLEMS AND DISENTANGLE STERIC AND NON-STERIC PROCESSES. FOR LAND ICE, THE APPROACH ALLOWS SIMILAR DISENTANGLING OF FIRN COMPACTION, ICE DYNAMICS, AND SURFACE MASS BALANCE PROCESSES. FOR TIDES, THE GRAVITY-ONLY SOLUTIONS WILL BENEFIT ALL GRACE TEAMS PROCESSING LEVEL-1 DATA, AND THE SUBSEQUENT ASSIMILATION SHOULD ESPECIALLY IMPROVE TIDE MODELS IN POLAR REGIONS WHERE HIGH-QUALITY DATA HAVE BEEN HISTORICALLY LACKING. Funding Only Action $23.2k 5/22/19 Not listed CRYOSPHERIC TIDAL AND HYDROLOGIC INVERSIONS FROM GRACE AND GRACE-FO LEVEL-1 DATA AND MULTI-MISSION ALTIMETER DATAWE PROPOSE THREE NEW INNOVATIVE INVESTIGATIONS TO FURTHER ADVANCE THE SCIENCE RETURN OF THE GRACE AND GRACE FOLLOW-ON(GRACE-FO) MISSIONS: 1) OPTIMAL INVERSION OF A HIGH SPATIAL RESOLUTION LAND-ICE EVOLUTION MODEL FROM THE COMBINED REDUCTION OF DATA FROM GRACE GRACE-FO SATELLITE LASER RANGING (SLR) AND SPACEBORNE AND AIRBORNE LASER ALTIMETRY INCLUDING ICESAT-1 ICESAT-2 OPERATION ICE BRIDGE AND GLOBAL ECOSYSTEMS DYNAMICS INVESTIGATION (GEDI); 2) ESTIMATION OF TIDES FROM GRACE GRACE-FO AND SLR DATA AND THE SUBSEQUENT ASSIMILATION OF THOSE LONG-WAVELENGTH SOLUTIONS INTO A HIGH-RESOLUTION NUMERICAL HYDRODYNAMIC MODEL; AND 3) OPTIMAL INVERSION OF EUSTATIC AND STERIC VARIABILITY OF INLAND AND MARGINAL SEAS FROM THE COMBINEDGRACE GRACE-FO SLR AND MULTI-MISSION RADAR ALTIMETER DATA.THE THREE INVESTIGATIONS ARE RELATED IN THAT THEY ALL LEVERAGE THE NASA GODDARD SPACE FLIGHT CENTER INFRASTRUCTURE AND EXPERTISE IN PROCESSING GRACE LEVEL-1B DATA AND IN ESTIMATING TIME-VARIABLE GRAVITY. MOREOVER EACH INVESTIGATION BENEFITS THE OTHER TWO WITHIMPROVED CORRECTIONS EITHER TIDAL OR NON-TIDAL AND THUS REDUCES OVERALL NOISE LEVELS AND LEAKAGE PROBLEMS. WHILE MANY PREVIOUS STUDIES HAVE COMBINED THE GRACE LEVEL-2 PRODUCTS WITH ALTIMETRY MEASUREMENTS FOR GEOPHYSICAL PROBLEMS SIMILAR TO THE ONES WE ADDRESS HERE NONE HAVE APPLIED THE LEVEL-1B RANGE-RATE OBSERVATIONS IN A RIGOROUS INVERSION PROCEDURE ACCOUNTING FOR THE FULL NOISECOVARIANCE AND ITERATING THE MODEL SOLUTIONS TO MINIMIZE THE OPTIMALLY WEIGHTED GRAVIMETRY AND ALTIMETRY OBSERVATIONS. THE PROPOSED METHOD SHOULD IMPROVE THE ACCURACY SPATIAL RESOLUTION AND ERROR CHARACTERIZATION OF LAND-ICE TIDE AND INLAND-SEA INVERSIONS. FOR THE LATTER THE GRAVITY-ALTIMETRY INVERSIONS EMPLOYING HIGH-RESOLUTION (MASCON) PARAMETERIZATIONS SHOULD REDUCE LEAKAGE PROBLEMS AND DISENTANGLE STERIC AND NON-STERIC PROCESSES. FOR LAND ICE THE APPROACH ALLOWS SIMILAR DISENTANGLING OF FIRN COMPACTION ICE DYNAMICS AND SURFACE MASS BALANCE PROCESSES. FOR TIDES THE GRAVITY-ONLY SOLUTIONS WILL BENEFIT ALL GRACE TEAMS PROCESSING LEVEL-1 DATA ANDTHE SUBSEQUENT ASSIMILATION SHOULD ESPECIALLY IMPROVE TIDE MODELS IN POLAR REGIONS WHERE HIGH-QUALITY DATA HAVE BEEN HISTORICALLY LACKING. $23.2k 10/18/18 2 CRYOSPHERIC, TIDAL, AND HYDROLOGIC INVERSIONS FROM GRACE AND GRACE-FO LEVEL-1 DATA AND MULTI-MISSION ALTIMETER DATA WE PROPOSE THREE NEW INNOVATIVE INVESTIGATIONS TO FURTHER ADVANCE THE SCIENCE RETURN OF THE GRACE AND GRACE FOLLOW-ON (GRACE-FO) MISSIONS: 1) OPTIMAL INVERSION OF A HIGH SPATIAL RESOLUTION LAND-ICE EVOLUTION MODEL FROM THE COMBINED REDUCTION OF DATA FROM GRACE, GRACE-FO, SATELLITE LASER RANGING (SLR), AND SPACEBORNE AND AIRBORNE LASER ALTIMETRY INCLUDING ICESAT-1, ICESAT-2, OPERATION ICE BRIDGE, AND GLOBAL ECOSYSTEMS DYNAMICS INVESTIGATION (GEDI); 2) ESTIMATION OF TIDES FROM GRACE, GRACE-FO, AND SLR DATA AND THE SUBSEQUENT ASSIMILATION OF THOSE LONG-WAVELENGTH SOLUTIONS INTO A HIGH-RESOLUTION NUMERICAL HYDRODYNAMIC MODEL; AND 3) OPTIMAL INVERSION OF EUSTATIC AND STERIC VARIABILITY OF INLAND AND MARGINAL SEAS FROM THE COMBINED GRACE, GRACE-FO, SLR, AND MULTI-MISSION RADAR ALTIMETER DATA. THE THREE INVESTIGATIONS ARE RELATED IN THAT THEY ALL LEVERAGE THE NASA GODDARD SPACE FLIGHT CENTER INFRASTRUCTURE AND EXPERTISE IN PROCESSING GRACE LEVEL-1B DATA AND IN ESTIMATING TIME-VARIABLE GRAVITY. MOREOVER, EACH INVESTIGATION BENEFITS THE OTHER TWO, WITH IMPROVED CORRECTIONS, EITHER TIDAL OR NON-TIDAL, AND THUS REDUCES OVERALL NOISE LEVELS AND LEAKAGE PROBLEMS. WHILE MANY PREVIOUS STUDIES HAVE COMBINED THE GRACE LEVEL-2 PRODUCTS WITH ALTIMETRY MEASUREMENTS FOR GEOPHYSICAL PROBLEMS SIMILAR TO THE ONES WE ADDRESS HERE, NONE HAVE APPLIED THE LEVEL-1B RANGE-RATE OBSERVATIONS IN A RIGOROUS INVERSION PROCEDURE ACCOUNTING FOR THE FULL NOISE COVARIANCE AND ITERATING THE MODEL SOLUTIONS TO MINIMIZE THE OPTIMALLY WEIGHTED GRAVIMETRY AND ALTIMETRY OBSERVATIONS. THE PROPOSED METHOD SHOULD IMPROVE THE ACCURACY, SPATIAL RESOLUTION, AND ERROR CHARACTERIZATION OF LAND-ICE, TIDE, AND INLAND-SEA INVERSIONS. FOR THE LATTER, THE GRAVITY-ALTIMETRY INVERSIONS, EMPLOYING HIGH-RESOLUTION (MASCON) PARAMETERIZATIONS, SHOULD REDUCE LEAKAGE PROBLEMS AND DISENTANGLE STERIC AND NON-STERIC PROCESSES. FOR LAND ICE, THE APPROACH ALLOWS SIMILAR DISENTANGLING OF FIRN COMPACTION, ICE DYNAMICS, AND SURFACE MASS BALANCE PROCESSES. FOR TIDES, THE GRAVITY-ONLY SOLUTIONS WILL BENEFIT ALL GRACE TEAMS PROCESSING LEVEL-1 DATA, AND THE SUBSEQUENT ASSIMILATION SHOULD ESPECIALLY IMPROVE TIDE MODELS IN POLAR REGIONS WHERE HIGH-QUALITY DATA HAVE BEEN HISTORICALLY LACKING. Funding Only Action $23.2k 10/18/18 1 CRYOSPHERIC, TIDAL, AND HYDROLOGIC INVERSIONS FROM GRACE AND GRACE-FO LEVEL-1 DATA AND MULTI-MISSION ALTIMETER DATA WE PROPOSE THREE NEW INNOVATIVE INVESTIGATIONS TO FURTHER ADVANCE THE SCIENCE RETURN OF THE GRACE AND GRACE FOLLOW-ON (GRACE-FO) MISSIONS: 1) OPTIMAL INVERSION OF A HIGH SPATIAL RESOLUTION LAND-ICE EVOLUTION MODEL FROM THE COMBINED REDUCTION OF DATA FROM GRACE, GRACE-FO, SATELLITE LASER RANGING (SLR), AND SPACEBORNE AND AIRBORNE LASER ALTIMETRY INCLUDING ICESAT-1, ICESAT-2, OPERATION ICE BRIDGE, AND GLOBAL ECOSYSTEMS DYNAMICS INVESTIGATION (GEDI); 2) ESTIMATION OF TIDES FROM GRACE, GRACE-FO, AND SLR DATA AND THE SUBSEQUENT ASSIMILATION OF THOSE LONG-WAVELENGTH SOLUTIONS INTO A HIGH-RESOLUTION NUMERICAL HYDRODYNAMIC MODEL; AND 3) OPTIMAL INVERSION OF EUSTATIC AND STERIC VARIABILITY OF INLAND AND MARGINAL SEAS FROM THE COMBINED GRACE, GRACE-FO, SLR, AND MULTI-MISSION RADAR ALTIMETER DATA. THE THREE INVESTIGATIONS ARE RELATED IN THAT THEY ALL LEVERAGE THE NASA GODDARD SPACE FLIGHT CENTER INFRASTRUCTURE AND EXPERTISE IN PROCESSING GRACE LEVEL-1B DATA AND IN ESTIMATING TIME-VARIABLE GRAVITY. MOREOVER, EACH INVESTIGATION BENEFITS THE OTHER TWO, WITH IMPROVED CORRECTIONS, EITHER TIDAL OR NON-TIDAL, AND THUS REDUCES OVERALL NOISE LEVELS AND LEAKAGE PROBLEMS. WHILE MANY PREVIOUS STUDIES HAVE COMBINED THE GRACE LEVEL-2 PRODUCTS WITH ALTIMETRY MEASUREMENTS FOR GEOPHYSICAL PROBLEMS SIMILAR TO THE ONES WE ADDRESS HERE, NONE HAVE APPLIED THE LEVEL-1B RANGE-RATE OBSERVATIONS IN A RIGOROUS INVERSION PROCEDURE ACCOUNTING FOR THE FULL NOISE COVARIANCE AND ITERATING THE MODEL SOLUTIONS TO MINIMIZE THE OPTIMALLY WEIGHTED GRAVIMETRY AND ALTIMETRY OBSERVATIONS. THE PROPOSED METHOD SHOULD IMPROVE THE ACCURACY, SPATIAL RESOLUTION, AND ERROR CHARACTERIZATION OF LAND-ICE, TIDE, AND INLAND-SEA INVERSIONS. FOR THE LATTER, THE GRAVITY-ALTIMETRY INVERSIONS, EMPLOYING HIGH-RESOLUTION (MASCON) PARAMETERIZATIONS, SHOULD REDUCE LEAKAGE PROBLEMS AND DISENTANGLE STERIC AND NON-STERIC PROCESSES. FOR LAND ICE, THE APPROACH ALLOWS SIMILAR DISENTANGLING OF FIRN COMPACTION, ICE DYNAMICS, AND SURFACE MASS BALANCE PROCESSES. FOR TIDES, THE GRAVITY-ONLY SOLUTIONS WILL BENEFIT ALL GRACE TEAMS PROCESSING LEVEL-1 DATA, AND THE SUBSEQUENT ASSIMILATION SHOULD ESPECIALLY IMPROVE TIDE MODELS IN POLAR REGIONS WHERE HIGH-QUALITY DATA HAVE BEEN HISTORICALLY LACKING. Funding Only Action $24.5k 2/17/17