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Papers by Peter Steigenberger

Research paper thumbnail of First results of instantaneous GPS/Galileo/COMPASS attitude determination

2012 6th ESA Workshop on Satellite Navigation Technologies (Navitec 2012) & European Workshop on GNSS Signals and Signal Processing, 2012

ABSTRACT The advent of modernized and new global navigation satellite systems (GNSS) has enhanced... more ABSTRACT The advent of modernized and new global navigation satellite systems (GNSS) has enhanced the availability of satellite based positioning, navigation, and timing (PNT) solutions. Specifically, it increases redundancy and yields operational back-up or independence in case of failure or unavailability of one system. Among existing GNSS, the Chinese COMPASS navigation satellite system (CNSS) and the European Galileo system are being developed. In this contribution, a COMPASS/Galileo/GPS robustness analysis is carried out for instantaneous, unaided attitude determination. Precise attitude determination using multiple GNSS antennas mounted on a platform relies on the successful resolution of the integer carrier phase ambiguities. The constrained Least-squares AMBiguity Decorrelation Adjustment (C-LAMBDA) method has been developed for the quadratically constrained GNSS compass model that incorporates the known baseline length. In this contribution the method is used to analyse the attitude determination performance when using the GPS, the Galileo, and COMPASS systems. The attitude determination performance is evaluated using GPS/Galileo/COMPASS data sets from a real data campaign in Australia. The study includes the performance analyses of both stand-alone and mixed constellation (GPS/Galileo/COMPASS) attitude estimation under satellite outage. We demonstrate and quantify the improved availability, reliability, and accuracy of attitude determination using the combined constellation.

Research paper thumbnail of Gravity Model TUM-2Sp Based on the Energy Balance Approach and Kinematic CHAMP Orbits

Earth Observation with CHAMP, 2005

Gravity Model TUM-2Sp Based on the Energy Balance Approach and Kinematic CHAMP Orbits Lorant Fold... more Gravity Model TUM-2Sp Based on the Energy Balance Approach and Kinematic CHAMP Orbits Lorant Foldvary*, Drazen Svehla, Christian Gerlach, Martin Wermuth. Thomas Gruber, Reiner Rummel, Markus Rothacher, Bjorn Fronmiknecht, Thomas Peters, Peter Steigenbcrgcr ...

Research paper thumbnail of GGOS-D Consistent and Combined Time Series of Geodetic/Geophyical Parameters

The generation of the GGOS-D global terrestrial reference frame is based on VLBI, SLR, and GPS ob... more The generation of the GGOS-D global terrestrial reference frame is based on VLBI, SLR, and GPS observations. The respective observation blocks, analysed as individual units, depend on the technique and cover either full weeks, full days (GPS and SLR) or observing sessions of 24h duration (VLBI). From these observation units, time series of parameters have been inferred and studies of the quality of the results have been carried out for the identification of deficits in the analyses. In this paper, we describe examples of time series of site coordinates, Earth orientation, and atmosphere parameters as well as peculiarities in the behaviour of these parameters. KeywordsSpace geodesy-GGOS-D-Time series

Research paper thumbnail of Re-processing strategies, station selection issues, discussion points and conclusions

This paper summarises the processing strategy issues for the IGS Reprocessing Analysis Centres. G... more This paper summarises the processing strategy issues for the IGS Reprocessing Analysis Centres. Guidelines for the station selection are discussed in order to maximise the benefit of the reprocessing effort. Finally some of the discussion points covered in the session will be presented as well as the conclusions and recommendations.

Research paper thumbnail of Troposphere delays from space geodetic techniques, water vapor radiometers, and numerical weather models over a series of continuous VLBI campaigns

Research paper thumbnail of GGOS-D: homogeneous reprocessing and rigorous combination of space geodetic observations

Journal of Geodesy, 2011

In preparation of activities planned for the realization of the Global Geodetic Observing System ... more In preparation of activities planned for the realization of the Global Geodetic Observing System (GGOS), a group of German scientists has carried out a study under the acronym GGOS-D which closely resembles the ideas behind the GGOS initiative. The objective of the GGOS-D project was the investigation of the methodological and informationtechnological realization of a global geodetic-geophysical observing system and especially the integration and combination of the space geodetic observations. In the course of this project, highly consistent time series of GPS, VLBI, and SLR results were generated based on common state-of-theart standards for modeling and parameterization. These series were then combined to consistently and accurately compute a Terrestrial Reference Frame (TRF). This TRF was subsequently used as the basis to produce time series of station

Research paper thumbnail of Vertical deformations from homogeneously processed GRACE and global GPS long-term series

Journal of Geodesy, 2011

Temporal variations in the geographic distribution of surface mass cause surface displacements. S... more Temporal variations in the geographic distribution of surface mass cause surface displacements. Surface displacements derived from GRACE gravity field coefficient time series also should be observed in GPS coordinate time series, if both time series are sufficiently free of systematic errors. A successful validation can be an important contribution to climate change research, as the biggest contributors to mass variability in the system Earth include the movement of oceanic, atmospheric, and continental water and ice. In our analysis, we find that if the signals are larger than their precision, both geodetic sensor systems see common signals for almost all the 115 stations surveyed. Almost 80% of the stations have their signal WRMS decreased, when we subtract monthly GRACE surface displacements from those observed by GPS data. Almost all other stations are on ocean islands or small peninsulas, where the physically expected loading signals are very small. For a fair comparison, the data V. Tesmer (B) OHB-System AG, Universitätsallee 27-29,

Research paper thumbnail of A CHAMP-only gravity field model from kinematic orbits using the energy integral

Geophysical Research Letters, 2003

In this paper we present results of a global gravity field recovery using half a year of CHAMP da... more In this paper we present results of a global gravity field recovery using half a year of CHAMP data. We use the energy integral of the motion of a satellite to transform satellite velocities into values of gravitational potential. The feasibility of this approach has already been ...

Research paper thumbnail of First results of instantaneous GPS/Galileo/COMPASS attitude determination

2012 6th ESA Workshop on Satellite Navigation Technologies (Navitec 2012) & European Workshop on GNSS Signals and Signal Processing, 2012

ABSTRACT The advent of modernized and new global navigation satellite systems (GNSS) has enhanced... more ABSTRACT The advent of modernized and new global navigation satellite systems (GNSS) has enhanced the availability of satellite based positioning, navigation, and timing (PNT) solutions. Specifically, it increases redundancy and yields operational back-up or independence in case of failure or unavailability of one system. Among existing GNSS, the Chinese COMPASS navigation satellite system (CNSS) and the European Galileo system are being developed. In this contribution, a COMPASS/Galileo/GPS robustness analysis is carried out for instantaneous, unaided attitude determination. Precise attitude determination using multiple GNSS antennas mounted on a platform relies on the successful resolution of the integer carrier phase ambiguities. The constrained Least-squares AMBiguity Decorrelation Adjustment (C-LAMBDA) method has been developed for the quadratically constrained GNSS compass model that incorporates the known baseline length. In this contribution the method is used to analyse the attitude determination performance when using the GPS, the Galileo, and COMPASS systems. The attitude determination performance is evaluated using GPS/Galileo/COMPASS data sets from a real data campaign in Australia. The study includes the performance analyses of both stand-alone and mixed constellation (GPS/Galileo/COMPASS) attitude estimation under satellite outage. We demonstrate and quantify the improved availability, reliability, and accuracy of attitude determination using the combined constellation.

Research paper thumbnail of Gravity Model TUM-2Sp Based on the Energy Balance Approach and Kinematic CHAMP Orbits

Earth Observation with CHAMP, 2005

Gravity Model TUM-2Sp Based on the Energy Balance Approach and Kinematic CHAMP Orbits Lorant Fold... more Gravity Model TUM-2Sp Based on the Energy Balance Approach and Kinematic CHAMP Orbits Lorant Foldvary*, Drazen Svehla, Christian Gerlach, Martin Wermuth. Thomas Gruber, Reiner Rummel, Markus Rothacher, Bjorn Fronmiknecht, Thomas Peters, Peter Steigenbcrgcr ...

Research paper thumbnail of GGOS-D Consistent and Combined Time Series of Geodetic/Geophyical Parameters

The generation of the GGOS-D global terrestrial reference frame is based on VLBI, SLR, and GPS ob... more The generation of the GGOS-D global terrestrial reference frame is based on VLBI, SLR, and GPS observations. The respective observation blocks, analysed as individual units, depend on the technique and cover either full weeks, full days (GPS and SLR) or observing sessions of 24h duration (VLBI). From these observation units, time series of parameters have been inferred and studies of the quality of the results have been carried out for the identification of deficits in the analyses. In this paper, we describe examples of time series of site coordinates, Earth orientation, and atmosphere parameters as well as peculiarities in the behaviour of these parameters. KeywordsSpace geodesy-GGOS-D-Time series

Research paper thumbnail of Re-processing strategies, station selection issues, discussion points and conclusions

This paper summarises the processing strategy issues for the IGS Reprocessing Analysis Centres. G... more This paper summarises the processing strategy issues for the IGS Reprocessing Analysis Centres. Guidelines for the station selection are discussed in order to maximise the benefit of the reprocessing effort. Finally some of the discussion points covered in the session will be presented as well as the conclusions and recommendations.

Research paper thumbnail of Troposphere delays from space geodetic techniques, water vapor radiometers, and numerical weather models over a series of continuous VLBI campaigns

Research paper thumbnail of GGOS-D: homogeneous reprocessing and rigorous combination of space geodetic observations

Journal of Geodesy, 2011

In preparation of activities planned for the realization of the Global Geodetic Observing System ... more In preparation of activities planned for the realization of the Global Geodetic Observing System (GGOS), a group of German scientists has carried out a study under the acronym GGOS-D which closely resembles the ideas behind the GGOS initiative. The objective of the GGOS-D project was the investigation of the methodological and informationtechnological realization of a global geodetic-geophysical observing system and especially the integration and combination of the space geodetic observations. In the course of this project, highly consistent time series of GPS, VLBI, and SLR results were generated based on common state-of-theart standards for modeling and parameterization. These series were then combined to consistently and accurately compute a Terrestrial Reference Frame (TRF). This TRF was subsequently used as the basis to produce time series of station

Research paper thumbnail of Vertical deformations from homogeneously processed GRACE and global GPS long-term series

Journal of Geodesy, 2011

Temporal variations in the geographic distribution of surface mass cause surface displacements. S... more Temporal variations in the geographic distribution of surface mass cause surface displacements. Surface displacements derived from GRACE gravity field coefficient time series also should be observed in GPS coordinate time series, if both time series are sufficiently free of systematic errors. A successful validation can be an important contribution to climate change research, as the biggest contributors to mass variability in the system Earth include the movement of oceanic, atmospheric, and continental water and ice. In our analysis, we find that if the signals are larger than their precision, both geodetic sensor systems see common signals for almost all the 115 stations surveyed. Almost 80% of the stations have their signal WRMS decreased, when we subtract monthly GRACE surface displacements from those observed by GPS data. Almost all other stations are on ocean islands or small peninsulas, where the physically expected loading signals are very small. For a fair comparison, the data V. Tesmer (B) OHB-System AG, Universitätsallee 27-29,

Research paper thumbnail of A CHAMP-only gravity field model from kinematic orbits using the energy integral

Geophysical Research Letters, 2003

In this paper we present results of a global gravity field recovery using half a year of CHAMP da... more In this paper we present results of a global gravity field recovery using half a year of CHAMP data. We use the energy integral of the motion of a satellite to transform satellite velocities into values of gravitational potential. The feasibility of this approach has already been ...