date: 2019-04-23T07:24:29Z
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pdf:docinfo:title: Evaluation of pre-CHAMP Gravity Models GRIM5-S1 and GRIM5-C1 with Satellite Crossover Altimetry
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dc:description: The new GFZ/GRGS gravity field models GRIM5-S1 and Cl, current initial models for the CHAMP mission, have been cornpared with other recent models JGM 3, EGM 96) for radial accuracy (by means of latitude lumped coefficients) in computations an altimetry satellite orbits. The basis for accuracy judgements are extensive (multi-year) averages of crossover sea height differences from Geosat and ERS 1/2 rnissions. These data are fully independent of the data used to develop these gravity models. We tested how weil these observed differences in all
the world's oceans agree with projections of the same errors from the scaled covariance matrix of their harmonic geopotential coefficients. lt was found that the tentative (model) scale factor of 5 for the formal standard deviations of the harmonic coefficients of the new GRIM fields is justified, i.e. the accuracy estirnates, provided together with the geopotential coefficients, are realistic.
Keywords: Scientific Technical Report; 00/22
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subject: The new GFZ/GRGS gravity field models GRIM5-S1 and Cl, current initial models for the CHAMP mission, have been cornpared with other recent models JGM 3, EGM 96) for radial accuracy (by means of latitude lumped coefficients) in computations an altimetry satellite orbits. The basis for accuracy judgements are extensive (multi-year) averages of crossover sea height differences from Geosat and ERS 1/2 rnissions. These data are fully independent of the data used to develop these gravity models. We tested how weil these observed differences in all
the world's oceans agree with projections of the same errors from the scaled covariance matrix of their harmonic geopotential coefficients. lt was found that the tentative (model) scale factor of 5 for the formal standard deviations of the harmonic coefficients of the new GRIM fields is justified, i.e. the accuracy estirnates, provided together with the geopotential coefficients, are realistic.
dc:creator: Jaroslav
description: The new GFZ/GRGS gravity field models GRIM5-S1 and Cl, current initial models for the CHAMP mission, have been cornpared with other recent models JGM 3, EGM 96) for radial accuracy (by means of latitude lumped coefficients) in computations an altimetry satellite orbits. The basis for accuracy judgements are extensive (multi-year) averages of crossover sea height differences from Geosat and ERS 1/2 rnissions. These data are fully independent of the data used to develop these gravity models. We tested how weil these observed differences in all
the world's oceans agree with projections of the same errors from the scaled covariance matrix of their harmonic geopotential coefficients. lt was found that the tentative (model) scale factor of 5 for the formal standard deviations of the harmonic coefficients of the new GRIM fields is justified, i.e. the accuracy estirnates, provided together with the geopotential coefficients, are realistic.
dcterms:created: 2019-04-18T10:41:07Z
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title: Evaluation of pre-CHAMP Gravity Models GRIM5-S1 and GRIM5-C1 with Satellite Crossover Altimetry
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dc:title: Evaluation of pre-CHAMP Gravity Models GRIM5-S1 and GRIM5-C1 with Satellite Crossover Altimetry
modified: 2019-04-23T07:24:29Z
cp:subject: The new GFZ/GRGS gravity field models GRIM5-S1 and Cl, current initial models for the CHAMP mission, have been cornpared with other recent models JGM 3, EGM 96) for radial accuracy (by means of latitude lumped coefficients) in computations an altimetry satellite orbits. The basis for accuracy judgements are extensive (multi-year) averages of crossover sea height differences from Geosat and ERS 1/2 rnissions. These data are fully independent of the data used to develop these gravity models. We tested how weil these observed differences in all
the world's oceans agree with projections of the same errors from the scaled covariance matrix of their harmonic geopotential coefficients. lt was found that the tentative (model) scale factor of 5 for the formal standard deviations of the harmonic coefficients of the new GRIM fields is justified, i.e. the accuracy estirnates, provided together with the geopotential coefficients, are realistic.
pdf:docinfo:subject: The new GFZ/GRGS gravity field models GRIM5-S1 and Cl, current initial models for the CHAMP mission, have been cornpared with other recent models JGM 3, EGM 96) for radial accuracy (by means of latitude lumped coefficients) in computations an altimetry satellite orbits. The basis for accuracy judgements are extensive (multi-year) averages of crossover sea height differences from Geosat and ERS 1/2 rnissions. These data are fully independent of the data used to develop these gravity models. We tested how weil these observed differences in all
the world's oceans agree with projections of the same errors from the scaled covariance matrix of their harmonic geopotential coefficients. lt was found that the tentative (model) scale factor of 5 for the formal standard deviations of the harmonic coefficients of the new GRIM fields is justified, i.e. the accuracy estirnates, provided together with the geopotential coefficients, are realistic.
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dc:subject: Scientific Technical Report; 00/22
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