HY-2C 25 km wind vectors Licensed under CC BY 4.0 by EUMETSAT
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HY-2C 25 km wind vectors

Operational Near real time product

This improved product (compared to OSI-115-a) is being prepared by the OSI SAF Team and should become operational by the end of 2024. Near-real time level 2 ocean wind vectors on a 25 km swath grid, based on the backscatter measurements of the Chinese National Satellite Ocean Application Service (NSOAS) HY-2C/HSCAT scatterometer. Winds from the same instrument on HY-2B and HY-D are also processed by OSI SAF.

Identification
Acronym : HY2C25
EUMETSAT collection ref. :

EO:EUM:DAT:0539

OSI SAF producer : Royal Netherlands Meteorological Institute
Identifier : OSI-115-c
Digital object identifier (DOI) 10.15770/EUM_SAF_OSI_NRT_2002
Id for archive (APNM) : OHCSW025
Licence/Attribution/Citation : CC BY 4.0 See below
Characteristics
Processing level : L2
Satellite input : HY-2C/ HSCAT
Other input : NWP outputs (wind, SST, land-sea mask)
Temporal sampling : 15 files per day
Central time : NA
Timeliness : ? The timeliness is the time elapsing from the sensing time of the last contributing file to the product dissemination to users. It is similar to the latency. 15 hours. Note: It is expected that 25% of the data is available within 3 hours, timeliness will depend on the number of data downloads through the polar ground stations.
Spatial coverage : Global
Spatial sampling : 25 km
Projection : Swath
File Format(s) : BUFR, NetCDF3
Characteristics & methods : Measurements of the wind direction and wind speed above the sea surface, obtained through the processing of scatterometer data originating from the HSCAT instrument on NSOAS's HaiYang 2C satellite.
Data Access
Credentials for access to OSI SAF tools For the FTP access, you need credentials which are provided on request, after registration on OSI SAF web site.

OSI SAF FTP (last 3 days)

ftp://ftppro.knmi.nl/

Directory: hy2c

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Accuracy Requirements
Target accuracy : Better than 2 m/s in wind component Stdev with an absolute mean difference 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
* Operational analyses and ocean models
* Research or Environmental monitoring.
History
Authorised to be operational / released :
Declared operational / released since :
On EUMETCast since :
On EDC since :
On FTP server since :
First date :
Full series temporal coverage : 2021-onwards
Detailed history :

The product series is operational since 2021:

  • version OSI-115-a (first version) from 2021 to 31/10/2024
  • version OSI-115-c (second version, improved algorithm) from 31/10/2024 onwards
Licence/Attribution/Citation
Licence : CC BY 4.0
Attribution : You must include attribution to EUMETSAT OSI SAF
Recommended citation : EUMETSAT OSI SAF, HY-2C 25 km wind vectors (2021), OSI-115-c, doi: 10.15770/EUM_SAF_OSI_NRT_2002
References : BibteX entry
Comments

    • See also OSI-115-d (HY-2C 50 km wind vectors)
    • The distribution of this product is subject to the conditions set in the EUMETSAT-NSOAS cooperation agreement.
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