NDLI: Assessment of observing time-variable gravity from GOCE GPS and accelerometer observations

Content Provider	Springer Nature Link
Author	Visser, P. N. A. M. Wal, W. Schrama, E. J. O. IJssel, J. Bouman, J.
Copyright Year	2014
Abstract	An assessment has been made of the possibility to estimate time-variable gravity from GPS-derived orbit perturbations and common-mode accelerometer observations of ESA’s GOCE Earth Explorer. A number of 20-day time series of Earth’s global long-wavelength gravity field have been derived for the period November 2009 to November 2012 using different parameter setups and estimation techniques. These techniques include a conventional approach where for each period, one set of gravity coefficients is estimated, either excluding or including empirical accelerations, and the so-called Wiese approach where higher frequency coefficients are estimated for the very long wavelengths. A principal component analysis of especially the time series of gravity field coefficients obtained by the Wiese approach and the conventional approach with empirical accelerations reveals an annual signal. When fitting this annual signal directly through the time series, the sine component (maximum in spring) displays features that are similar to well-known continental hydrological mass changes for the low latitude areas, such as mass variations in the Amazon basin, Africa and Australia for spatial scales down to 1,500 km. The cosine component (maximum in winter), however, displays large signals that can not be attributed to actual mass variations in the Earth system. The estimated gravity field changes from GOCE orbit perturbations are likely affected by missing GPS observations in case of high ionospheric perturbations during periods of increased solar activity, which is minimal in Summer and maximal towards the end of autumn.
Starting Page	1029
Ending Page	1046
Page Count	18
File Format	PDF
ISSN	09497714
Journal	Journal of Geodesy
Volume Number	88
Issue Number	11
e-ISSN	14321394
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-06-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	GOCE Kinematic orbits Long-wavelength time-variable gravity Ionospheric perturbations Wiese approach Geophysics/Geodesy Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Geophysics Geochemistry and Petrology Computers in Earth Sciences

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

GOCE: assessment of GPS-only gravity field determination

Comparison of GOCE-GPS gravity fields derived by different approaches

GPS-derived orbits for the GOCE satellite

GOCE: precise orbit determination for the entire mission

First GOCE gravity field models derived by three different approaches

GOCE gravitational gradiometry

Precise orbit determination based on raw GPS measurements

Monitoring GOCE gradiometer calibration parameters using accelerometer and star sensor data: methodology and first results

The ITG-Goce02 gravity field model from GOCE orbit and gradiometer data based on the short arc approach

Assessment of observing time-variable gravity from GOCE GPS and accelerometer observations

Similar Documents

GOCE: assessment of GPS-only gravity field determination

Comparison of GOCE-GPS gravity fields derived by different approaches

GPS-derived orbits for the GOCE satellite

GOCE: precise orbit determination for the entire mission

First GOCE gravity field models derived by three different approaches

GOCE gravitational gradiometry

Precise orbit determination based on raw GPS measurements

Monitoring GOCE gradiometer calibration parameters using accelerometer and star sensor data: methodology and first results

The ITG-Goce02 gravity field model from GOCE orbit and gradiometer data based on the short arc approach

Assessment of observing time-variable gravity from GOCE GPS and accelerometer observations