TVGOGO: Time variable gravity observed by GPS derived orbit positions (2013-2015)

Primary goal of this project is to derive large scale mass transports in the Earth system from positions of Low Earth Orbiters equipped with a GNSS receiver. At the moment this is hardly possible, because state of the art methods are degraded by systematic influences and are not able to provide sufficient accuracy. To reach this goal a new approach for kinematic orbit estimation will be investigated and implemented. Kinematic orbits will be computed for several satellite missions, as for example CHAMP, GRACE and GOCE.

Results

Orbit solutions can be found in the download section:

Kinematic orbits

Based on these kinematic orbit products different gravity field solutions have been computed. Main goal is to provide a time series of monthly gravity field solutions. Gravity Field Solutions  be found in the download section:

Gravity Field Solutions

Acknowledgements

This project is funded within the Austrian Space Applications Program (ASAP) Phase IX by the Austrian Research Promotion Agency (FFG).

References

Zehentner, N.; Mayer-Gürr, T.:
Kinematic orbits for GRACE and GOCE based on raw GPS observations. - in: IAG Scientific Assembly 2013. Potsdam, Germany am: 01.09.2013

Zehentner, N.; Mayer-Gürr, T.:
Gravity variations from precise LEO orbits of GRACE and GOCE. - in: EGU General Assembly 2014. Wien am: 01.05.2014

Baur, O.; Weigelt, M.; Zehentner, N.; Mayer-Gürr, T.; Jäggi, A.:
On the capability of Swarm for surface mass variation monitoring: Quantitative assessment based on orbit information from CHAMP, GRACE and GOCE. - in: EGU General Assembly 2014. Wien am: 28.04.2014

Mayer-Gürr, T.; Brockmann, J. M.; Loth, I.; Höck, E.; Zehentner, N.; Pail, R.; Schuh, W.-D.:
Status of the fifth generation GOCE time-wise Earth gravity field model. - in: EGU General Assembly 2014. Wien am: 01.05.2014

Weigelt, M.; van Dam, T.; Baur, O.; Steffen, H.; Tourian, M. J.; Jäggi, A.; Prange, L.; Meyer, U.; Bock, H.; Mayer-Gürr, T.; Zehentner, N.; Sneeuw, N.:
Pushing the limits of gravity field recovery from high-low satellite-to-satellite tracking - a combination of 10 years of data of the satellite pseudo-constellation CHAMP, GRACE and GOCE. - in: EGU General Assembly 2014. Wien am: 01.05.2014

Weigelt, M.; Baur, O.; Zehentner, N.; Mayer-Gürr, T.; van Dam, T.:
Surface mass variation monitoring from orbit information of GPS-tracked low-Earth orbiters. - in: AGU Fall Meeting. San Francisco am: 15.12.2014 

Mayer-Gürr, T.; Zehentner, N.; Klinger, B.; Kvas, A.:
ITSG-Grace2014: a new GRACE gravity field release computed in Graz. - in: GRACE Science Team Meeting (GSTM). Potsdam am: 29.09.2014 

Weigelt, M.; van Dam, T.; Baur, O.; Tourian, M. J.; Steffen, H.; Sosnica, K.; Jäggi, A.; Zehentner, N.; Mayer-Gürr, T.; Sneeuw, N.:
How well can the combination hlSST and SLR replace GRACE? A discussion from the point of view of applications. - in: Grace Science Team Meeting 2014. Potsdam am: 29.09.2014

Zehentner, N.; Mayer-Gürr, T.; Weigelt, M.; Jäggi, A.:
Non-dedicated satellite missions for time variable gravity field estimation. - in: Grace Science Team Meeting 2014. Potsdam am: 29.09.2014

Sosnica, K.; Jäggi, A.; Weigelt, M.; van Dam, T.; Zehentner, N.; Mayer-Gürr, T.:
Time varying gravity from SLR and combined SLR and high-low satellite-to-satellite tracking data. - in: Grace Science Team Meeting 2014. Potsdam am: 29.09.2014

Brockmann, J. M.; Zehentner, N.; Höck, E.; Krasbutter, I.; Mayer-Gürr, T.; Pail, R.; Schuh, W.-D.:
A gravity field model from the entire GOCE mission: EGM_TIM_RL05. - in: 5th International GOCE User Workshop. Paris am: 25.11.2014 

Brockmann, J. M.; Zehentner, N.; Höck, E.; Pail, R.; Loth, I.; Mayer-Gürr, T.; Schuh, W.-D.:
EGM TIM RL05: An Independent Geoid with Centimeter Accuracy Purely Based on the GOCE Mission. - in: Geophysical research letters (2014) In Press 


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Contact
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Norbert Zehentner
Steyrergasse 30/III
8010 Graz
Austria
Tel: +43/316/873-6344
Fax: +43/316/873-6845
zehentnernoSpam@tugraz.at

Torsten Mayer-Gürr
Steyrergasse 30/III
8010 Graz
Austria
Tel: +43 316 873-6359
Fax: +43 316 873-6845
mayer-guerrnoSpam@tugraz.at