Details
Original language | English |
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Title of host publication | Beyond 100: The Next Century in Geodesy |
Subtitle of host publication | Proceedings of the IAG General Assembly, Montreal, Canada, July 8-18, 2019 |
Editors | Jeffrey T. Freymueller, Laura Sánchez |
Publisher | Springer Science and Business Media Deutschland GmbH |
Pages | 67-75 |
Number of pages | 9 |
ISBN (print) | 9783031098567 |
Publication status | Published - 11 Mar 2020 |
Event | 27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019 - Montreal, Canada Duration: 8 Jul 2019 → 18 Jul 2019 |
Publication series
Name | International Association of Geodesy Symposia |
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Volume | 152 |
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
- Earth and Planetary Sciences(all)
- Computers in Earth Sciences
- Earth and Planetary Sciences(all)
- Geophysics
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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 proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - LUH-GRACE2018
T2 - 27th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2019
AU - Koch, Igor
AU - Flury, Jakob
AU - Naeimi, Majid
AU - Shabanloui, Akbar
N1 - Funding Information: Acknowledgements We are thankful for the valuable comments of the two anonymous reviewers who helped to improve the manuscript considerably. Part of this work was funded by Deutsche Forschungs-gemeinschaft (DFG) (SFB1128 geo-Q: Collaborative Research Centre 1128 “Relativistic Geodesy and Gravimetry with Quantum Sensors”).
PY - 2020/3/11
Y1 - 2020/3/11
N2 - 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.
AB - 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.
KW - GRACE
KW - GRACE Follow-On
KW - Gravity field recovery
KW - Time-variable gravity field
UR - http://www.scopus.com/inward/record.url?scp=85142623028&partnerID=8YFLogxK
U2 - 10.1007/1345_2020_92
DO - 10.1007/1345_2020_92
M3 - Conference contribution
AN - SCOPUS:85142623028
SN - 9783031098567
T3 - International Association of Geodesy Symposia
SP - 67
EP - 75
BT - Beyond 100: The Next Century in Geodesy
A2 - Freymueller, Jeffrey T.
A2 - Sánchez, Laura
PB - Springer Science and Business Media Deutschland GmbH
Y2 - 8 July 2019 through 18 July 2019
ER -