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The SING (Studying the Impact of the NGGM and MAGIC missions) project is an ESA-funded initiative designed to evaluate the scientific and operational contributions of the Next Generation Gravity Mission (NGGM) and the Mass-change And Geosciences International Constellation (MAGIC). The ESA funded Studying the Impact of the NGGM and MAGIC Gravity missions (SING) project aims to evaluate the added value of these missions for scientific applications and operational services across hydrology, ocean sciences, glaciology, climate sciences, solid earth sciences, and geodesy. Within this multidisciplinary framework, the present study focuses specifically on the added value of these missions for two key operational geodetic services: the realization of the International Height Reference Frame (IHRF) and Precise Orbit Determination (POD). To achieve these objectives, the study utilizes a 12-year simulated dataset (1995–2006) of Spherical Harmonic Coefficients (SHCs) to generate Level-4 geodetic products, including anomalies in gravity potential (ΔV), geoid heights (ΔΝ), and physical heights (ΔΗ). In the context of the IHRF, these point-specific products are utilized to compute potential values at selected IHRF core sites as well as their temporal evolution, thereby ensuring the realization and maintenance of the dynamic component of IHRF in alignment with the International Height Reference System (IHRS) standards. Furthermore, the impact of the missions is investigated through POD scenarios for Low Earth Orbiters, where simulated gravity signals are validated against GRACE and GRACE-FO models, by exploiting inter-satellite K-band Ranging (KBR) and Laser Ranging Interferometry (LRI) range and range rate residuals. The overall analysis demonstrates that NGGM and MAGIC provide substantial improvements over GRACE-type missions, with increased accuracies by more than 50%, in terms of potential recovery at IHRF sites, and more that 60% improved range and range-rate residuals. These results confirm NGGM and MAGIC as essential future missions with significant impact to geodesy, critical to the realization of the IHRF, POD and the enhancement of operational geodetic services.

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Evaluating the Geodetic Contributions of NGGM and MAGIC Missions Within the SING Project

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  • 出版模式：

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  • 发表日期：

    2026年

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  • E. M. G. Mamagiannou,
  • T. Papanikolaou,
  • D. A. Natsiopoulos,
  • G. Gavriilidou,
  • G. S. Vergos,
  • D. Tsoulis

摘要

The SING (Studying the Impact of the NGGM and MAGIC missions) project is an ESA-funded initiative designed to evaluate the scientific and operational contributions of the Next Generation Gravity Mission (NGGM) and the Mass-change And Geosciences International Constellation (MAGIC). The ESA funded Studying the Impact of the NGGM and MAGIC Gravity missions (SING) project aims to evaluate the added value of these missions for scientific applications and operational services across hydrology, ocean sciences, glaciology, climate sciences, solid earth sciences, and geodesy. Within this multidisciplinary framework, the present study focuses specifically on the added value of these missions for two key operational geodetic services: the realization of the International Height Reference Frame (IHRF) and Precise Orbit Determination (POD). To achieve these objectives, the study utilizes a 12-year simulated dataset (1995–2006) of Spherical Harmonic Coefficients (SHCs) to generate Level-4 geodetic products, including anomalies in gravity potential (ΔV), geoid heights (ΔΝ), and physical heights (ΔΗ). In the context of the IHRF, these point-specific products are utilized to compute potential values at selected IHRF core sites as well as their temporal evolution, thereby ensuring the realization and maintenance of the dynamic component of IHRF in alignment with the International Height Reference System (IHRS) standards. Furthermore, the impact of the missions is investigated through POD scenarios for Low Earth Orbiters, where simulated gravity signals are validated against GRACE and GRACE-FO models, by exploiting inter-satellite K-band Ranging (KBR) and Laser Ranging Interferometry (LRI) range and range rate residuals. The overall analysis demonstrates that NGGM and MAGIC provide substantial improvements over GRACE-type missions, with increased accuracies by more than 50%, in terms of potential recovery at IHRF sites, and more that 60% improved range and range-rate residuals. These results confirm NGGM and MAGIC as essential future missions with significant impact to geodesy, critical to the realization of the IHRF, POD and the enhancement of operational geodetic services.