FN Archimer Export Format
PT J
TI Exploring the Benefits of Using CryoSat-2's Cross-Track Interferometry to Improve the Resolution of Multisatellite Mesoscale Fields
BT 
AF DIBARBOURE, G.
   LE TRAON, Pierre-Yves
   GALIN, N.
AS 1:1;2:2;3:3;
FF 1:;2:PDG-ODE-ADM3;3:;
C1 CLS, F-31520 Ramonville St Agne, France.
   IFREMER, Plouzane, France.
   UCL, Dept Earth Sci, Ctr Polar Observat & Modelling, London, England.
C2 CLS, FRANCE
   IFREMER, FRANCE
   UCL, UK
SI BREST
SE PDG-ODE-ADM3
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
IF 1.82
TC 2
UR https://archimer.ifremer.fr/doc/00152/26305/24575.pdf
LA English
DT Article
DE ;Altimetry;Remote sensing;Sampling;Satellite observations;Interpolation schemes;Inverse methods
AB Sea surface height (SSH) measurements provided by pulse-limited radar altimeters are one-dimensional profiles along the satellite's nadir track, with no information whatsoever in the cross-track direction. The anisotropy of resulting SSH profiles is the most limiting factor of mesoscale SSH maps that merge the 1D profiles.This paper explores the potential of the cross-track slope derived from the Cryosphere Satellite-2 (CryoSat-2)'s synthetic aperture radar interferometry (SARin) mode to increase the resolution of mesoscale fields in the cross-track direction. Through idealized 1D simulations, this study shows that it is possible to exploit the dual SARin measurement (cross-track slope and SSH profile) in order to constrain mesoscale mapping in the cross-track direction.An error-free SSH slope allows a single SARin instrument to recover almost as much SSH variance as two coordinated altimeters. Noise-corrupted slopes can also be exploited to improve the mapping, and a breakthrough is observed for SARin errors ranging from 1 to 5 rad for 150-km-radius features in strong currents, and 0.1-0.5 rad for global mesoscale.Although only limited experiments might be possible with the error level of current CryoSat-2 data, this paper shows the potential of the SAR interferometry technology to reduce the anisotropy of altimeter measurements if the SARin error is significantly reduced in the future, and in particular in the context of a prospective SARin demonstrator optimized for oceanography.
PY 2013
PD JUN
SO Journal Of Atmospheric And Oceanic Technology
SN 0739-0572
PU Amer Meteorological Soc
VL 30
IS 7
UT 000322126100017
BP 1511
EP 1526
DI 10.1175/JTECH-D-12-00156.1
ID 26305
ER

EF