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GNSS Transpolar Earth Reflectometry exploriNg system (G-TERN): Mission concept

Urheber*innen

Cardellach,  E.
External Organizatio;

/persons/resource/wickert

Wickert,  J.
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Baggen,  Rens
External Organizatio;

Benito,  Javier
External Organizatio;

Camps,  Adriano
External Organizatio;

Catarino,  Nuno
External Organizatio;

Chapron,  Bertrand
External Organizatio;

Dielacher,  Andreas
External Organizatio;

Fabra,  Fran
External Organizatio;

Flato,  Greg
External Organizatio;

Fragner,  Heinrich
External Organizatio;

Gabarró,  Carolina
External Organizatio;

Gommenginger,  Christine
External Organizatio;

Haas,  Christian
External Organizatio;

Healy,  Sean
External Organizatio;

Hernandez-Pajares,  Manuel
External Organizatio;

Høeg,  Per
External Organizatio;

Jäggi,  Adrian
External Organizatio;

Kainulainen,  Juha
External Organizatio;

Khan,  Shfaqat Abbas
External Organizatio;

Lemke,  Norbert M.K.
External Organizatio;

Li,  Weiqiang
External Organizatio;

Nghiem,  Son V.
External Organizatio;

Pierdicca,  Nazzareno
External Organizatio;

Portabella,  Marcos
External Organizatio;

Rautiainen,  Kimmo
External Organizatio;

Rius,  Antonio
External Organizatio;

Sasgen,  Ingo
External Organizatio;

/persons/resource/maxsem

Semmling,  Maximilian
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Shum,  C.K.
External Organizatio;

Soulat,  François
External Organizatio;

Steiner,  Andrea K.
External Organizatio;

Tailhades,  Sébastien
External Organizatio;

/persons/resource/mthomas

Thomas,  M.
1.3 Earth System Modelling, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Vilaseca,  Roger
External Organizatio;

Zuffada,  Cinzia
External Organizatio;

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3072888.pdf
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Zitation

Cardellach, E., Wickert, J., Baggen, R., Benito, J., Camps, A., Catarino, N., Chapron, B., Dielacher, A., Fabra, F., Flato, G., Fragner, H., Gabarró, C., Gommenginger, C., Haas, C., Healy, S., Hernandez-Pajares, M., Høeg, P., Jäggi, A., Kainulainen, J., Khan, S. A., Lemke, N. M., Li, W., Nghiem, S. V., Pierdicca, N., Portabella, M., Rautiainen, K., Rius, A., Sasgen, I., Semmling, M., Shum, C., Soulat, F., Steiner, A. K., Tailhades, S., Thomas, M., Vilaseca, R., Zuffada, C. (2018): GNSS Transpolar Earth Reflectometry exploriNg system (G-TERN): Mission concept. - IEEE Access, 6, 13980-14018.
https://doi.org/10.1109/ACCESS.2018.2814072


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3072888
Zusammenfassung
The GNSS Transpolar Earth Reflectometry exploriNg system (G-TERN) was proposed in response to ESA’s Earth Explorer 9 Revised Call by a team of 33 multi-disciplinary scientists. The primary objective of the mission is to quantify at high spatio-temporal resolution crucial characteristics, processes and interactions between sea ice and other Earth system components in order to advance the understanding and prediction of climate change and its impacts on the environment and society. The objective is articulated through three key questions: (1) In a rapidly changing Arctic regime and under the resilient Antarctic sea ice trend, how will highly dynamic forcings and couplings between the various components of the ocean, atmosphere and cryosphere modify or influence the processes governing the characteristics of the sea ice cover (ice production, growth, deformation and melt)? (2) What are the impacts of extreme events and feedback mechanisms on sea ice evolution? (3) What are the effects of the cryosphere behaviours, either rapidly changing or resiliently stable, on the global oceanic and atmospheric circulation and mid-latitude extreme events? To contribute answering these questions G-TERN will measure key parameters of the sea ice, the oceans and the atmosphere with frequent and dense coverage over polar areas, becoming a ’dynamic mapper’ of the ice conditions, ice production and loss in multiple time and space scales, and surrounding environment. Over polar areas, G-TERN will measure sea ice surface elevation (<10 cm precision), roughness and polarimetry aspects at 30 km resolution and 3 days full coverage. G-TERN will implement the interferometric GNSS reflectometry concept, from a single satellite in near-polar orbit with capability for 12 simultaneous observations. Unlike currently orbiting GNSS reflectometry missions, G-TERN uses the full GNSS available bandwidth to improve its ranging measurements. The lifetime would be 2025- 2030 or optimally 2025-2035, covering key stages of the transition towards a nearly ice-free Arctic Ocean in Summer. This paper describes the mission objectives, it reviews its measurement techniques, summarizes the suggested implementation and finally it estimates the expected performance.