2005 •
The advanced terrain trackin altimeter instrument
Authors:
G. Levrini
Abstract:
The Advanced Terrain Tracking Altimeter (ATTA) Instrument is the new generation altimeter for the Earth Observation Preparatory Program (EOPP) of the European Space Agency (ESA). It is designed as a multimode adaptive instrument able to ensure full coverage of the Earth's surface, including land regions. Over oceans it is characterized by an accuracy better than 5 cm. including the correction of the errors due to the ionosphere and to the troposphere. Both these corrections will be performed by the instrument itself, without the need of any add (...)
The Advanced Terrain Tracking Altimeter (ATTA) Instrument is the new generation altimeter for the Earth Observation Preparatory Program (EOPP) of the European Space Agency (ESA). It is designed as a multimode adaptive instrument able to ensure full coverage of the Earth's surface, including land regions. Over oceans it is characterized by an accuracy better than 5 cm. including the correction of the errors due to the ionosphere and to the troposphere. Both these corrections will be performed by the instrument itself, without the need of any additional data from external sources. This marks a difference with the past approach (with respect to ERS-1, for instance) and enables to optimize the quality of the auxiliary data for altimeter measurement purposes. The adaptivity of the resolution over the different surfaces will be ensured by a digital chirp generator (DCG) which constitutes a major technological issue of the ATTA instrument. This paper gives a survey on one of the two contracts assigned in parallel to the industry to perform the feasibility study'. (Read More)
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