LUH-GRACE2018: A New Time Series of Monthly Gravity Field Solutions from GRACE

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Authors

  • Igor Koch
  • Jakob Flury
  • Majid Naeimi
  • Akbar Shabanloui

Research Organisations

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Details

Original languageEnglish
Title of host publicationBeyond 100: The Next Century in Geodesy
Subtitle of host publicationProceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019
EditorsJeffrey T. Freymueller, Laura Sánchez
PublisherSpringer Science and Business Media Deutschland GmbH
Pages67-75
Number of pages9
ISBN (print)9783031098567
Publication statusPublished - 11 Mar 2020
Event27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019 - Montreal, Canada
Duration: 8 Jul 201918 Jul 2019

Publication series

NameInternational Association of Geodesy Symposia
Volume152
ISSN (Print)0939-9585
ISSN (electronic)2197-9359

Abstract

In this contribution, we present the LUH-GRACE2018 time series of monthly gravity field solutions covering the period January 2003–March 2016. The solutions are obtained from GRACE K-Band Range Rate (KBRR) measurements as main observations. The monthly solutions are computed using the in-house developed GRACE-SIGMA software. The processing is based on dynamic orbit and gravity field determination using variational equations and consists of two main steps. In the first step, 3-hourly orbital arcs of the two satellites and the state transition and sensitivity matrices are dynamically integrated using a modified Gauss-Jackson integrator. In this step, initial state vectors and 3D accelerometer bias parameters are adjusted using GRACE Level-1B reduced-dynamic positions as observations. In the second step, normal equations are accumulated and the normalized spherical harmonic coefficients up to degree and order 80 are estimated along with arc-wise initial states, accelerometer biases and empirical KBRR parameters. Here KBRR measurements are used as main observations and reduced-dynamic positions are introduced to solve for the low frequency coefficients. In terms of error degree standard deviations as well as Equivalent Water Heights (EWH), our gravity field solutions agree well with RL05 solutions of CSR, GFZ and JPL.

Keywords

    GRACE, GRACE Follow-On, Gravity field recovery, Time-variable gravity field

ASJC Scopus subject areas

Cite this

LUH-GRACE2018: A New Time Series of Monthly Gravity Field Solutions from GRACE. / Koch, Igor; Flury, Jakob; Naeimi, Majid et al.
Beyond 100: The Next Century in Geodesy : Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019. ed. / Jeffrey T. Freymueller; Laura Sánchez. Springer Science and Business Media Deutschland GmbH, 2020. p. 67-75 (International Association of Geodesy Symposia; Vol. 152).

Research output: Chapter in book/report/conference proceedingConference contributionResearchpeer review

Koch, I, Flury, J, Naeimi, M & Shabanloui, A 2020, LUH-GRACE2018: A New Time Series of Monthly Gravity Field Solutions from GRACE. in JT Freymueller & L Sánchez (eds), Beyond 100: The Next Century in Geodesy : Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019. International Association of Geodesy Symposia, vol. 152, Springer Science and Business Media Deutschland GmbH, pp. 67-75, 27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019, Montreal, Canada, 8 Jul 2019. https://doi.org/10.1007/1345_2020_92, https://doi.org/10.15488/4461
Koch, I., Flury, J., Naeimi, M., & Shabanloui, A. (2020). LUH-GRACE2018: A New Time Series of Monthly Gravity Field Solutions from GRACE. In J. T. Freymueller, & L. Sánchez (Eds.), Beyond 100: The Next Century in Geodesy : Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019 (pp. 67-75). (International Association of Geodesy Symposia; Vol. 152). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/1345_2020_92, https://doi.org/10.15488/4461
Koch I, Flury J, Naeimi M, Shabanloui A. LUH-GRACE2018: A New Time Series of Monthly Gravity Field Solutions from GRACE. In Freymueller JT, Sánchez L, editors, Beyond 100: The Next Century in Geodesy : Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019. Springer Science and Business Media Deutschland GmbH. 2020. p. 67-75. (International Association of Geodesy Symposia). doi: 10.1007/1345_2020_92, 10.15488/4461
Koch, Igor ; Flury, Jakob ; Naeimi, Majid et al. / LUH-GRACE2018 : A New Time Series of Monthly Gravity Field Solutions from GRACE. Beyond 100: The Next Century in Geodesy : Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019. editor / Jeffrey T. Freymueller ; Laura Sánchez. Springer Science and Business Media Deutschland GmbH, 2020. pp. 67-75 (International Association of Geodesy Symposia).
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