Description: The static gravitational model GO_CONS_GCF_2_TIM_R6 Is the 6th release of the GOCE gravity field model by means of the time-wise approach.GOCE Input Data:- Gradients: EGG_NOM_2 (re-calibration, released 2018, version 0202)- Orbits:-- SST_PKI (kinematic orbits); SST_PCV (variance information of kinematic orbit positions),-- SST_RNX (original RINEX orbit data)- Attitude: EGG_IAQ_2C- Non-conservative accelerations: EGG_CCD_2C- Data period: 09/10/2009 - 20/10/2013No static a-priori gravity field information applied (neither as reference model, nor for constraining the solution)Processing procedures:- Gravity from orbits (SST):- short-arc integral method applied to kinematic orbits, up to degree/order 150- orbit variance information included as part of the stochastic model, it is refined by empirical covariance functions- Gravity from gradients (SGG):- parameterization up to degree/order 300- observations used: Vxx, Vyy, Vzz and Vxz in the Gradiometer Reference Frame (GRF)- realistic stochastic modelling by applying digital decorrelation filters to the observation equations; estimated separately for individual data segments applying a robust procedure- Combined solution:- addition of normal equations (SST D/O 150, SGG D/O 300)- Constraints:* Kaula-regularization applied to coefficients of degrees/orders 201 - 300 (constrained towards zero)* observation equations for zero gravity anomaly observations in polar regions (>83°) to constrain polar gaps towards zero (degree 11 to 300)- Optimum weighting (SST, SGG, constraints) based on variance component estimationSpecific features of resulting gravity field:- Gravity field solution is independent of any other gravity field information- Constraint towards zero starting from degree/order 201 to improve signal-to-noise ratio- Related variance-covariance information represents very well the true errors of the coefficients- Solution can be used for independent comparison and combination on normal equation level with other satellite-only models (e.g. GRACE), terrestrial gravity data, and altimetry- Since in the low degrees the solution is based solely on GOCE orbits, it is not competitive with a GRACE model in this spectral region is available via this data publication and via ICGEM (Ince et al., 2019). Link to ICGEM Website: http://icgem.gfz-potsdam.de- The reference epoch is 2010-01-01 (MJD 55197)Further processing details can be found in Brockmann (2014), Brockmann et al. (2014) Mayer-Gürr et al. (2005) and Pail et al. (2014).
Global identifier:
Doi(
"10.5880/ICGEM.2019.003",
)
Origins: /Wissenschaft/GFZ
Tags: Filterbrunnen ? Satellit ? Vergleichsanalyse ? Polargebiet ? Modellierung ? EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS ? EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY ? GOCE ? ICGEM ? global gravitational model ?
License: cc-by/4.0
Language: Englisch/English
Issued: 2019-01-01
Time ranges: 2019-01-01 - 2019-01-01
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