Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Igor Koch"'
Publikováno v:
Remote Sensing, Vol 13, Iss 9, p 1766 (2021)
During its science phase from 2002–2017, the low-low satellite-to-satellite tracking mission Gravity Field Recovery And Climate Experiment (GRACE) provided an insight into Earth’s time-variable gravity (TVG). The unprecedented quality of gravity
Externí odkaz:
https://doaj.org/article/2f71c30b50d1459abd96c85cf27cb6ce
Autor:
Adrian Jaeggi, Ulrich Meyer, Martin Lasser, Frank Flechtner, Christoph Dahle, Eva Boergens, Christoph Förste, Torsten Mayer-Gürr, Andreas Kvas, Saniya Behzadpour, Felix Öhlinger, Jean-Michel Lemoine, Stéphane Bourgogne, Igor Koch, Jakob Flury
The Combination Service for Time-Variable Gravity Fields (COST-G) is providing monthly gravity fields of the dedicated gravity missions GRACE and GRACE-FO, which are combined from the individual time-series of the COST-G associated and partner analys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8948ca0f7783a91fa089c291c4e2787b
https://doi.org/10.5194/egusphere-egu23-4993
https://doi.org/10.5194/egusphere-egu23-4993
GRACE and GRACE-FO K-band range-rate post-fit residuals obtained after a common estimation of monthly gravity field coefficients and ancillary satellite parameters represent a complex superposition of different effects. In this contribution, we analy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d51d7afb8c45da19ed755ce5cce0afa
https://doi.org/10.5194/egusphere-egu23-8998
https://doi.org/10.5194/egusphere-egu23-8998
Post-fit residuals of satellite-to-satellite tracking measurements of the GRACE and GRACE-FO missions obtained after a common estimation of orbit and gravity field parameters should ideally contain measurement noise with a behavior that meets expecta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa66366e42e5e144e3923a1f61f302a0
https://www.repo.uni-hannover.de/handle/123456789/13359
https://www.repo.uni-hannover.de/handle/123456789/13359
At the institute of geodesy (IfE) we are processing GRACE and GRACE-FO level 1B data to obtain the time variable monthly gravity field (TVG). For this we are using a 2 step variational equation approach (Koch et al. 2021) implemented in our inhouse d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56ac84da5f93a2b3ad7911f8c7409805
https://doi.org/10.5194/gstm2022-84
https://doi.org/10.5194/gstm2022-84
The monthly gravity field models at LUH are computed with a generalized dynamic orbit determination approach utilizing precise range-rate measurements derived from the K-band ranging system as main observations. A by-product of the gravity field comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd99962c4a954759aaf59aee591ab6fb
https://doi.org/10.5194/gstm2022-51
https://doi.org/10.5194/gstm2022-51
We show results of both the LUH operational GRACE-FO gravity field processing and of our recent reprocessing of the full GRACE mission. Since 2021, the LUH group at IfE is recognized as Analysis Center in the IAG Combination Service for Time Variable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29e4f4ea80e80d21b295e146d1a66e8a
https://doi.org/10.5194/gstm2022-78
https://doi.org/10.5194/gstm2022-78
Autor:
Adrian Jäggi, Torsten Mayer-Gürr, Christoph Dahle, Ulrich Meyer, Matthias Weigelt, Igor Koch, Jakob Flury, Karl Hans Neumayer, Andreas Kvas, Frank Flechtner, Jean-Michel Lemoine, Martin Lasser
Publikováno v:
Advances in Geosciences, Vol 55, Pp 1-11 (2020)
Advances in Geosciences
Lasser, Martin; Meyer, Ulrich; Jäggi, Adrian; Mayer-Gürr, Torsten; Kvas, Andreas; Neumayer, Karl Hans; Dahle, Christoph; Flechtner, Frank; Lemoine, Jean-Michel; Koch, Igor; Weigelt, Matthias; Flury, Jakob (2020). Benchmark data for verifying background model implementations in orbit and gravity field determination software. Advances in geosciences, 55, pp. 1-11. Copernicus Publications 10.5194/adgeo-55-1-2020
Advances in Geosciences
Lasser, Martin; Meyer, Ulrich; Jäggi, Adrian; Mayer-Gürr, Torsten; Kvas, Andreas; Neumayer, Karl Hans; Dahle, Christoph; Flechtner, Frank; Lemoine, Jean-Michel; Koch, Igor; Weigelt, Matthias; Flury, Jakob (2020). Benchmark data for verifying background model implementations in orbit and gravity field determination software. Advances in geosciences, 55, pp. 1-11. Copernicus Publications 10.5194/adgeo-55-1-2020
Benchmark data for verifying background model implementations in orbit and gravity field determination software In the framework of the COmbination Service for Time-variable Gravity fields (COST-G) gravity field solutions from different analysis cent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd88bbc5c3cb6d0503ff92dd529277f1
https://doi.org/10.5194/adgeo-55-1-2020
https://doi.org/10.5194/adgeo-55-1-2020
Currently a reprocessing of the LUH GRACE monthly gravity field solutions is carried out at our institute. The new processing chain utilizes updated background models, parametrization and outlier detection. This processing chain is consistent with th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3503919bcdb12a2de79ce5b83d3ddb5a
https://doi.org/10.5194/egusphere-egu22-11396
https://doi.org/10.5194/egusphere-egu22-11396
Autor:
Adrian Jaeggi, Ulrich Meyer, Heike Peter, Joao Teixeira Encarnacao, Martin Lasser, Frank Flechtner, Christoph Dahle, Eva Boergens, Christoph Förste, Torsten Mayer-Gürr, Andreas Kvas, Saniya Behzadpour, Jean-Michel Lemoine, Stéphane Bourgogne, Igor Koch, Jakob Flury, Andreas Groh, Annette Eicker, Alejandro Blazquez, Benoit Meyssignac
Publikováno v:
Jäggi, A.; Meyer, U.; Peter, Heike; De Teixeira da Incarnacao, J.; Lasser, M.; Flechtner, F.; Dahle, C.; Boergens, E.; Förste, C.; Mayer-Gürr, T.; Kvas, A.; Behzadpour, S.; Lemoine, J.-M.; Bourgogne, S.; Koch, I.; Flury, J.; Groh, A.; Eicker, A.; Blazquez, A. and Meyssignac, B. (September 2022). COST-G: Status and recent developments. (Unpublished). In: GGHS 2022. Austin, TX, USA. 12.-14.Sep. 2'22.
Three years after its inauguration we draw a very positive résumé of the work of IAG’s Combination Service for Time-variable Gravity Fields (COST-G). The operational combination of GRACE-FO monthly gravity fields runs flawlessly. All seven associ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b016b1885e85a19c6c8720033874e0d
https://doi.org/10.5194/egusphere-egu22-2976
https://doi.org/10.5194/egusphere-egu22-2976