Analysis of Dual-Frequency Ocean Backscatter Measurements at Ku- and Ka-Bands Using Near-Nadir Incidence GPM Radar Data
|Author(s)||Nouguier Frederic1, 2, Mouche Alexis3, Rascle Nicolas3, Chapron Bertrand3, Vandemark Douglas4|
|Affiliation(s)||1 : Mediterranean Inst Oceanog, F-13288 Marseille, France.
2 : Univ Toulon & Var, CNRS INSU, IRD, F-83957 La Garde, France.
3 : IFREMER, Lab Oceanog Spatiale, F-29280 Plouzane, France.
4 : Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA.
|Source||Ieee Geoscience And Remote Sensing Letters (1545-598X) (Ieee-inst Electrical Electronics Engineers Inc), 2016-09 , Vol. 13 , N. 9 , P. 1310-1314|
|WOS© Times Cited||3|
|Keyword(s)||Microwave, radar cross section, scattering, spaceborne radar|
|Abstract||Global colocalized ocean surface measurements using the Global Precipitation Measurement near-nadir dual-frequency Ku- and Ka-band microwave measurements are analyzed and compared. Focusing on the Ka and Ku cross-sections fall-off with incidence angles, the contemporaneous measurements enable to more precisely document differing ocean scattering characteristics for both microwave frequencies. Sensitivity with wind speed and significant wave height is further reported using global comparisons with numerical estimates. As demonstrated, the bifrequency capability can provide direct means to efficiently separate short-scale wave contributions, between mean squared slope and curvature characteristics, and to further gain valuable insights concerning near-nadir instruments onboard future ocean satellite missions including the China-France Oceanography Satellite and the Surface Water Ocean Topography Mission.|