Metop-C ASCAT 25 km Winds

Operational Near real time product

The ASCAT Wind Product contains measurements of the wind direction and wind speed above the sea surface. The measurements are obtained through the processing of scatterometer data originating from the ASCAT instrument on EUMETSAT's Metop-A satellite, as described in the ASCAT Wind Product User Manual.

Acronym : ASCAT25
Product navigator reference :


OSI SAF producer : Royal Netherlands Meteorological Institute
Identifier : OSI-102-c
Acronym for EDC (APNM) : OAS025
Processing level : L2
Satellite input : Metop-C/ASCAT
Other input : ECMWF outputs (wind, SST, land-sea mask)
Frequency : Continuous
Timeliness : 2 h 45
Spatial coverage : Global
Spatial sampling : 25 km
File Formats : WIND FTP Server (BUFR), WIND FTP Server (NetCDF3)
Characteristics & methods : Swath sigma0’s and wind vectors
Accuracy Requirements
Target accuracy : Better than 2 m/s in wind component Stdev with a bias of less than 0.5 m/s in wind speed on a monthly basis.
Verification/validation method : Triple collocation with NWP and buoys
Applications and users
Usage : * Operational Met Services (including assimilation in at least 8 NWP models, nowcasting)
* Operational analyses and ocean models
* Research or Environmental monitoring.
Declared operational / released since :
On FTP server since :
First date :
  • See also OSI-102 (Metop-A ASCAT 25 km Winds) and OSI-102-b (Metop-B ASCAT 25 km Winds)

  • Uses geophysical model function CMOD7

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