Next Article in Journal
Imaging and Characterization of Extrasolar Planets with the Next Generation of Space Telescopes
Previous Article in Journal
A New Geospatial Model Integrating a Fuzzy Rule-Based System in a GIS Platform to Partition a Complex Urban System in Homogeneous Urban Contexts
Previous Article in Special Issue
Application of Radial Basis Functions for Height Datum Unification
Article

Assessment of Earth Gravity Field Models in the Medium to High Frequency Spectrum Based on GRACE and GOCE Dynamic Orbit Analysis

1
Geoscience Australia, Cnr Jerrabomberra Ave and Hindmarsh Drive, Symonston, ACT 2609, Australia
2
Cooperative Research Centre for Spatial Information, Docklands, VIC 3008, Australia
3
Department of Geodesy and Surveying, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
*
Author to whom correspondence should be addressed.
Geosciences 2018, 8(12), 441; https://doi.org/10.3390/geosciences8120441
Received: 22 October 2018 / Revised: 19 November 2018 / Accepted: 23 November 2018 / Published: 27 November 2018
(This article belongs to the Special Issue Gravity Field Determination and Its Temporal Variation)
An analysis of current static and time-variable gravity field models is presented focusing on the medium to high frequencies of the geopotential as expressed by the spherical harmonic coefficients. A validation scheme of the gravity field models is implemented based on dynamic orbit determination that is applied in a degree-wise cumulative sense of the individual spherical harmonics. The approach is applied to real data of the Gravity Field and Steady-State Ocean Circulation (GOCE) and Gravity Recovery and Climate Experiment (GRACE) satellite missions, as well as to GRACE inter-satellite K-band ranging (KBR) data. Since the proposed scheme aims at capturing gravitational discrepancies, we consider a few deterministic empirical parameters in order to avoid absorbing part of the gravity signal that may be included in the monitored orbit residuals. The present contribution aims at a band-limited analysis for identifying characteristic degree ranges and thresholds of the various GRACE- and GOCE-based gravity field models. The degree range 100–180 is investigated based on the degree-wise cumulative approach. The identified degree thresholds have values of 130 and 160 based on the GRACE KBR data and the GOCE orbit analysis, respectively. View Full-Text
Keywords: dynamic orbit determination; gravity field models; satellite gravity missions; inter-satellite ranging dynamic orbit determination; gravity field models; satellite gravity missions; inter-satellite ranging
Show Figures

Figure 1

MDPI and ACS Style

Papanikolaou, T.D.; Tsoulis, D. Assessment of Earth Gravity Field Models in the Medium to High Frequency Spectrum Based on GRACE and GOCE Dynamic Orbit Analysis. Geosciences 2018, 8, 441. https://doi.org/10.3390/geosciences8120441

AMA Style

Papanikolaou TD, Tsoulis D. Assessment of Earth Gravity Field Models in the Medium to High Frequency Spectrum Based on GRACE and GOCE Dynamic Orbit Analysis. Geosciences. 2018; 8(12):441. https://doi.org/10.3390/geosciences8120441

Chicago/Turabian Style

Papanikolaou, Thomas D., and Dimitrios Tsoulis. 2018. "Assessment of Earth Gravity Field Models in the Medium to High Frequency Spectrum Based on GRACE and GOCE Dynamic Orbit Analysis" Geosciences 8, no. 12: 441. https://doi.org/10.3390/geosciences8120441

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop