The IFREMER team will perform a collocation between QuikSCAT and the ERS-2 scatterometer and altimeter, TOPEX/POSEIDON altimeters and SSM/I. Both L2A and L2B products will be collocated with measurements derived from these sensors. Two collocation products will be available: Total and Minimal products. The first will contain, for each area where there is collocation, for each sensor, the extracted datasets from IFREMER database as well as an index describing the areas of collocation. The second one will be derived from the collocation between cells of the two sensors based on a time-space separation. A brief details about this proposed product follows.

ERS-2 Scatterometer
Collocation of QuikSCAT L2A and L2B products with ERS-2 scatterometer wind vector and sigma0. ECMWF wind analysis estimated under ERS-2 scatterometer swath are also included. The space and time collocation windows are 50km and 30mn, respectively.

ERS-2 Altimeter
Collocation of QuikSCAT L2A and L2B products with ERS-2 altimeter wind speed, significant wave height and backscatter coefficient. The 23.8GHz and 36.5GHz brightness temperatures will be also available. The space and time collocation windows are 25km and 1hour.

TOPEX/POSEIDON Altimeter
Collocation of QuikSCAT L2A and L2B products with TOPEX/POSEIDON wind speed, significant wave height and backscatter coefficient.. The 18GHz, 21GHz and 36.5GHz brightness temperatures will be also available. The space and time collocation windows are 25km and 1hour.

SSM/I
Collocation of QuikSCAT L2A and L2B products with SSM/I wind speed, water vapor content, water liquid content and all brightness temperatures. At this stage, only total collocation product is planned.

Furthermore, IFREMER is involved in the collocation between buoys (NDBC, European and Japanese) and QuikSCAT wind vectors and sigma-0 estimates. These data will collected by H. Graber and will be available for all investigators who need this kind of data in near real time for the QSCAT PIs, engineers etc.

Estimated Delay: Data will be available within 2 weeks of the time IFREMER receives them from JPL.

Data availability:
These data will be distributed on IFREMER/CERSAT WWW server (http://www.ifremer.fr/cersat)   One will easily extract the data he wants for specific periods and areas. Reading tools will be provided in C (perhaps in IDL if we have time) for all minimal products generated at CERSAT.

 

Contact Information:
Abderrahim Bentamy - Sylvie POULIQUEN
Email:fpaf@ifremer.fr