HR: 10:50h
AN: SF52A-03    [Abstracts]
TI: Developments in the Applications of GNSS and GNSS-like Signal Measurements to Atmosphere and Ocean Remote Sensing at ESA
AU: * Silvestrin, P
EM: pierluigi.silvestrin@esa.int
AF: European Space Agency, ESTEC EOP-FPP Keplerlaan 1, Noordwijk, ZH 2200AZ Netherlands
AB: Over the last few years several research and development activites have taken place in the frame of the European Space Agency (ESA) programmes to exploit GNSS and GNSS-like signal measurements for remote sensing of the atmosphere and of the oceans. These included: - the definition of a space mission, the Atmosphere and Climate Explorer (ACE+), for active sounding of water vapour in the troposphere and of temperature in the troposphere and stratosphere, using Ku- and Ka-band GNSS-like signals in a radio occultation approach - the development and validation of multiple instrument breadboards, proving the technical feasibility of the ACE+ concept; - the further development of instrumentation for GNSS radio occultation, namely of a second-generation GRAS (GNSS Receiver for Atmospheric Sounding) using Galileo signals in addition to GPS; - research on radio occultation retrieval algorithms and on the limits of performance caused by tropospheric turbulence, as well as on possible approaches to reduce its impact; - airborne experiments with GPS signals reflected at the sea surface, aiming in particular at the retrieval of directional sea surface roughness, in terms of full directional mean square slope from delay-doppler maps of the reflected signals, in addition to altimetric information. The status and results of these activities will be reviewed, emphasizing key achievements, open issues and possible avenues for further research and development.
DE: 6904 Atmospheric propagation
DE: 6969 Remote sensing
DE: 4275 Remote sensing and electromagnetic processes (0689)
DE: 4294 Instruments and techniques
DE: 0394 Instruments and techniques
SC: Special Focus: Advances in Data Acquisition, Management, Analysis and Display [SF]
MN: 2004 AGU Fall Meeting