FN Archimer Export Format PT J TI Effect of long waves on Ku-band ocean radar backscatter at low incidence angles using TRMM and altimeter data BT AF TRAN, Ngan CHAPRON, Bertrand VANDEMARK, D AS 1:1;2:2;3:3; FF 1:;2:PDG-DOP-DCB-OPS-LOS;3:; C1 Collecte Localisat Satellites, Space Oceanog Div, F-31520 St Agne, France. IFREMER, Ctr Brest, F-29280 Plouzane, France. Univ New Hampshire, Ocean Proc Analy Lab, Durham, NH 03824 USA. C2 CLS, FRANCE IFREMER, FRANCE UNIV NEW HAMPSHIRE, USA SI BREST SE PDG-DOP-DCB-OPS-LOS IN WOS Ifremer jusqu'en 2018 copubli-france copubli-int-hors-europe IF 1.14 TC 47 UR https://archimer.ifremer.fr/doc/2007/publication-3299.pdf LA English DT Article DE ;Space borne radar;Scattering;Radar cross section;Altimetry AB This letter uses a large ocean satellite data set to document relationships between Ku-band radar backscatter (sigma-0) of the sea surface, near-surface wind speed (U), and ocean wave height (SWH). The observations come from satellite crossovers of the Tropical Rainfall Mapping Mission (TRMM) Precipitation Radar (PR) and two satellite altimeters, namely: 1) Jason-1 and 2) ENVISAT. At these nodes, we obtain TRMM clear-air normalized radar cross-section data along with coincident altimeter-derived significant wave height. Wind speed estimates come from the European Centre for Medium-Range Weather Forecast. TRMM PR is the first satellite to measure low incidence Ku-band ocean backscatter at a continuum of incidence angles from 0 degrees to 18 degrees. This letter utilizes these global ocean data to assess hypotheses developed in past theoretical and field studies. PY 2007 PD OCT SO IEEE Geoscience and Remote Sensing Letters SN 1545-598X PU IEEE Geoscience and Remote Sensing Society VL 4 IS 4 UT 000250389900009 BP 542 EP 546 DI 10.1109/LGRS.2007.896329 ID 3299 ER EF