Publications

 

The ADVANTAGE white paper (23 January 2018) can be downloaded here.

 

System architecture – Kepler

Advanced Technologies for Satellite Navigation and Geodesy.
G. Giorgi, T.D. Schmidt, C. Trainotti, R. Mata-Calvo, C. Fuchs, M.M. Hoque, J. Berdermann, J. Furthner, C. Günther, T. Schuldt, J. Sanjuan, M. Gohlke, M. Oswald, C. Braxmaier, K. Balidakis, G. Dick, F. Flechtner, M. Ge, S. Glaser, R. König, G. Michalak, M. Murböck, M. Semmling, and H. Schuh.
Advances in Space Research, 64(6), pp. 1256-1273, 2019. DOI: 10.1016/j.asr.2019.06.01

Kepler – A Satellite Navigation System without Clocks and little Ground Infrastructure.
C. Günther.
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Miami, FL, USA, 2018, pp. 849-856. DOI:
10.33012/2018.15997

Kepler – Satellite Navigation System Description and Validation.
C. Günther.
Proceedings of the
9th Workshop on Satellite Navigation Technologies (NAVITEC 2018), European Space Research and Technology Centre (ESTEC), Noordwijk, The Netherlands, 2018.

Operational Envelope and Link Scheduling for Inter-satellite Links in Next-generation GNSSs.
C. Deprez and G. Giorgi.
Proceedings of the IEEE Aerospace Conference 2021, Big Sky, MT, USA. To appear.

Future GNSS constellations with optical inter-satellite links. Preliminary space segment analyses.
G.
Giorgi, B. Kroese, and G. Michalak.
Proceedings of the IEEE Aerospace Conference 2019, Big Sky, MT, USA. DOI: 10.1109/AERO.2019.8742105

Optical Frequency References

Simultaneous laser frequency stabilization to an optical cavity and an iodine frequency reference.
J. Sanjuan, K. Abich, L. Blümel, M. Gohlke, V. Gualani, M. Oswald, T. Wegehaupt, T. Schuldt, and C. Braxmaier.
Optics Letters, 46(2), pp. 360-363, 2021. DOI: 10.1364/OL.413419.

Optical Clock Technologies Enabling Advanced GNSS.
T. Schuldt, M. Gohlke, M. Oswald, J. Sanjuan, T. Wegehaupt, T. Blomberg, J. Wüst, L. Blümel, V. Gualani, K. Abich, and C. Braxmaier.
Proceedings of the European Navigation Conference, 2020, to appear.

Long-term stable optical cavity for special relativity tests in space.
J. Sanjuan, K. Abich, M. Gohlke, A. Resch, T. Schuldt, T. Wegehaupt, G.P. Barwood, P. Gill, and C. Braxmaier.
Optics Express, 27(25) pp. 857-860. DOI: 10.1364/oe.27.036206

In-Orbit-Verification of Optical Clock Technologies.
T. Schuldt, L. Wörner, C. Braxmaier, Team COFROS.
Proceedings of the International Astronautical Congress, 2019.

Optical Clock Technologies for Future GNSS.
T. Schuldt, M. Gohlke, J. Sanjuan, K. Abich, M. Oswald, K. Doringshoff, E. Kovalchuk, A. Peters, and C. Braxmaier.
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Miami, FL, USA, pp. 857-860, 2018. DOI: 10.33012/2018.15885

An Absolute Optical Frequency Reference for Space.
T. Schuldt, M. Oswald, M. Gohlke, K. Doringshoff, E. Ko
valchuk, A. Peters, and C. Braxmaier.
 Proceedings of the International Conference on Space Optics (ICSO2018), 11807X, Chania, Greece, 2018. DOI: 10.1117/12.2536204

Optical Frequency References for Space.
T. Schuldt, M. Oswald, M. Gohlke, K. Doringshoff, E. Kovalchuk, A. 
Peters, and C. Braxmaier.
Proceedings of the IAC 2018, Bremen, Germany, 2018.

Optical Inter-Satellite Links

Evaluation of optical ranging and frequency transfer for the Kepler system : preliminary laboratory tests.
R.M. Calvo, J. Poliak, J. Surof, and R. Wolf.
Proceedings of the European Navigation Conference, 2020, to appear.

Laboratory Characterization of Optical Inter-satellite Links for Future GNSS.
J. Surof, J. Poliak, R.M. Calvo, M. Richerzhagen, R. Wolf, and T.D. Schmidt.
Proceedings of the 32nd International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2019), pp. 1051-1058, Miami, FL, USA, 2019. DOI: 10.33012/2019.17042.

Laboratory demonstrator of optical inter-satellite links for the Kepler system.
J. Poliak, R. Mata Calvo, and J. Surof.
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Miami, FL, USA, pp. 861-867, 2018. DOI: 10.33012/2018.15886

Timing aspects

Detection and Identification of Phase and Frequency Drifts in Clock Ensembles.
C. Trainotti and G. Giorgi.
Proceedings of the 51st Annual Precise Time and Time Interval Systems and Applications Meeting (PTTI), pp.347-365, San Diego, CA, USA, 2019. DOI: 10.33012/2020.17310.

Detection and Identification of Faults in Clock Ensembles.
C. Trainotti, G. Giorgi, and J. Furthner.
Proceedings of the 32nd International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2019), pp. 3342-3358, Miami, FL, USA, 2019. DOI: 10.33012/2019.17104.

Comparison between simulation and hardware realization for different clock steering techniques.
M. Gödel, T.D. Schmidt, and J. Furthner.
Metrologia, 56(3), 2019.  DOI:10.1088/1681-7575/ab144d

Simulating the Realization of a Mixed Clock Ensemble.
C. Trainotti, T.D. Schmidt, and J. Furthner.
Proceedings of the Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF), Orlando, FL, USA, 2019. DOI: 10.1109/FCS.2019.8856103

Comparison of Clock Models in View of Clock Composition, Clock Steering and Measurement Fitting.
C. Trainotti, T.D. Schmidt, and J. Furthner.
Proceedings of the ION Precise Time and Time Interval Meeting (PTTI), pp. 265-283, Reston, VA, USA, 2019. DOI: 10.33012/2019.16756

Comparing Clock Steering Technique Performances in Simulations and Measurements.
T.D. Schmidt,
C. Trainotti, and J. Furthner.
Proceedings of the ION Precise Time and Time Interval Meeting (PTTI), Reston, VA, SA, 2019. DOI: 10.33012/2019.16758

Composite Clock Algorithms for System Time in Global Navigation Satellite Systems.
T.D. Schmidt, C. Trainotti, J. Isoard, G. Giorgi, J. Furthner, and C. Günther.
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Miami, FL, USA, 2018, pp. 963 – 967. DOI: 10.33012/2018.15891

Relativistic corrections for intersatellite frequency transfer.
B. Kroese, G. Giorgi, and C. Günther.
Proceedings of the 32nd European Frequency and Time Forum (EFTF), Torino, Italy, April 2018. DOI: 10.1109/EFTF.2018.8409041

Investigation of Pole Placement Technique for Clock Steering.
T.D. Schmidt, M. Gödel, and J. Furthner.
Proceedings of the 49th Annual Precise Time and Time Interval Systems and Applications Meeting (PTTI), Reston, Virginia, pp. 22-29, 2018.  DOI: 10.33012/2018.15603

Precise Orbit Determination

Precise orbit and Earth parameter determination supported by LEO satellites, inter-satellite links and synchronized clocks of a future GNSS.
G. Michalak, S. Glaser, K. Neumayer, and R. König.
Advances in Space research, 2021, accepted for publication (March 2021).

Precise Orbit Determination of the Kepler Navigation System — a Simulation Study.
G. Michalak, K. Neumayer, and R. König.
Proceedings of the European Navigation Conference, 2020, to appear.

Precise orbit and reference frame determination supported by LEO satellites, inter-satellite links and synchronized clocks of a future GNSS.
G. Michalak, S. Glaser, K. Neumayer, and R. König.
Proceedings of the 7tht Colloquium on Scientific and Fundamental Aspects of GNSS, Zurich, Switzerland, 2019.

Precise Orbit Determination with Inter-satellite Links and Ultra-stable Time for a Future Satellite Navigation System.
G. Michalak, K. Neumayer, and R. König.
Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018), Miami, FL, USA, 2018, pp. 968-1001. DOI: 10.33012/2018.15892

Exploitation

Reference system origin and scale realization within the future GNSS constellation Kepler.
S. Glaser, G. Michalak, B. Männel, R. König, K.H. Neumayer, and H. Schuh.
Journal of Geodesy, 94(117), 2020. DOI: 10.1007/s00190-020-01441-0

Simulation globaler terrestrischer Referenzrahmen für das Globale Geodätische Beobachtungssystem GGOS.
S. Glaser, H. Schuh, and R. König.
zfv – Zeitschrift für Geodäsie, Geoinformation und Landmanagement, 2020.  DOI: 10.12902/zfv-0308-2020

Sea Ice concentration derived from GNSS reflection measurements in Fram Strait.
M. Semmling, A. Rosel, D. Divine, S. Gerland, G. Stienne, S. Reboul, M. Ludwig, J. Wickert, and H. Schuh.
IEEE Transactions on Geoscience and Remote Sensing, accepted for publication, 2019. DOI: 10.1109/TGRS.2019.2933911

Future SLR station networks in the framework of simulated multi-technique terrestrial reference frames.
S. Glaser, R. König, K. Neumayer, et al.
Journal of Geodesy, accepted for publication, 2019. DOI: 10.1007/s00190-019-01256-8

Retrieving precipitable water vapor from shipborne multi‐GNSS observations.
J. Wang, Z. Wu, M. Semmling, F. Zus, S. Gerland, M. Ramatschi, et al.
Geophysical Research Letters, 46(9), pp. 5000–5008, (2019). DOI: 10.1029/2019GL082136

Precise Point Positioning for Next-Generation GNSS.
P. Henkel.
Proceedings of the European Navigation Conference 2020, to appear.

Precise Point Positioning with Kepler.
P. Henkel.
Proceedings of the 90th IEEE Vehicular Technology Conference (VTC2019), Honolulu, HI, USA, 2019.

On the impact of local ties on the datum realization of global terrestrial reference frames.
S. Glaser,
R. König, K.H. Neumayer, T. Nilsson, R. Heinkelmann, F. Flechtner, and H. Schuh.
Journal of Geodesy, 93(5), pp. 655–667, 2018. DOI: 10.1007/s00190-018-1189-0

Estimates of higher order ionospheric effects for GNSS signals received onboard LEO satellites.
M.M.
Hoque.
Proceedings of the International Workshop on GNSS Ionosphere (IWGI2018)- Observations, Advances and Opportunities, November 4-6, Shanghai, China, 2018.

An over bounding model of higher order ionospheric residuals for dual-frequency SBAS.
M.M. Hoque
and S. Schlüter.
Proceedings of the 2nd URSI AT-RASC, Gran Canaria, 28 May–1 June 2018.

Estimating integrated water vapor trends from VLBI, GPS, and numerical weather models: Sensitivity to tropospheric parameterization.
K. Balidakis, T. Nilsson, F. Zus, S. Glaser, R. Heinkelmann, Z. Deng, and H. Schuh.
Journal of Geophysical Research: Atmospheres, 123, pp. 6356–6372, 2018. DOI:10.1029/2017JD028049