FN Archimer Export Format PT J TI Altimeter dual-frequency observations of surface winds, waves, and rain rate in tropical cyclone Isabel - art. no. C01004, BT AF QUILFEN, Yves TOURNADRE, Jean CHAPRON, Bertrand AS 1:1;2:1;3:1; FF 1:PDG-DOP-DCB-OPS-LOS;2:PDG-DOP-DCB-OPS-LOS;3:PDG-DOP-DCB-OPS-LOS; C1 IFREMER, Lab Oceanog Spatiale, F-29280 Plouzane, France. C2 IFREMER, FRANCE SI BREST SE PDG-DOP-DCB-OPS-LOS IN WOS Ifremer jusqu'en 2018 IF 2.8 TC 33 UR https://archimer.ifremer.fr/doc/2006/publication-1033.pdf LA English DT Article DE ;Mesearement limitations;Dual frequency altimeter;High resolution measurement;Tropical cyclone AB [1] Extreme weather events such as tropical cyclones are difficult to observe with conventional means. Satellite-based observations provide essential measurements of key parameters governing tropical cyclones. They are critical for short-term forecasting. Radiometers onboard the Defense Meteorological Satellite Program satellite series, WindSat and Tropical Rainfall Measuring Mission satellites, scatterometers onboard the ERS, ADEOS, and QuikScat satellites offer unprecedented synoptic observations of surface wind and atmospheric liquid water content, revealing the storm structures with good accuracy. However, satellite estimates do not provide direct measurements of geophysical parameters and can suffer from limitations linked to the sensors characteristics, such as the signal wavelength and polarization or the measurement incidence angle. For example, measurements at Ku band are strongly affected by rain. Still, each observing system can offer specific information that can be combined with the others. In particular, we highlight the capabilities of dual-frequency altimeter to provide very high resolution measurements of rain rate, surface wind speed, and wave characteristics. A method is proposed to obtain continuous along-track 5 km resolution measurements of these parameters in the tropical cyclone Isabel. The results shows that dual-frequency altimeters can provide useful information to complement and validate the operational fields provided by the atmospheric numerical models and by NOAA observing systems. PY 2006 SO Journal of Geophysical Union - Research C - Oceans SN 0148-0227 PU American Geophysical Union VL 111 IS C1 UT 000234999800003 DI 10.1029/2005JC003068 ID 1033 ER EF