Validation Report for “High Resolution Winds” (HRW – PGE09 v4.0)

SAF/NWC/CDOP2/INM/SCI/VR/13, Issue 1, Rev. 0The purpose of this document is to present the Scientific Validation Results for version v4.0 of the HRW product (“High Resolution Winds”, belonging to SAFNWC/MSG software version 2013). This validation has been based on the comparison of the HRW Atmospheric Motion Vectors with winds obtained from Radiosounding bulletins available from the GTS. The statistical indicators established in the “Report from the Working Group on Verification Statistics of the 3rd International Winds Workshop” [RD.12], with some amendments in the “Report from the Working Group on Verification & Quality Indices of the 4th International Winds Workshop” [RD.15]), are calculated to achieve this. These indicators have been thoroughly used throughout the world for the Validation of Satellite winds through the comparison with Radiosoundings

Scientific and Validation Report for the Wind product processor of the NWC/GEO

NWC/CDOP3/GEO/AEMET/SCI/VR/Wind, Issue 1, Rev. 0. Applicable to GEO-HRW v6.0 (NWC-038

NWC SAF/High resolution winds AMV software version 2016

Ponencia presentada en: 13th International Winds Workshop celebrado del 27 de junio al 1 de Julio de 2016 en Monterey, California.The “High Resolution Winds (HRW)” AMV software, developed inside the “Satellite Application Facility on support to Nowcasting and very short range forecasting (NWC SAF)” stand alone “Software package for geostationary satellites (NWC/GEO)”, provides a detailed calculation of Atmospheric Motion Vectors and Trajectories locally and in real time by its users

Scientific and Validation Report for the Wind product processors of the NWC/GEO

NWC/CDOP2/GEO/AEMET/SCI/VR/Wind, Issue 1, Rev. 0. Applicable to GEO-HRW v5.0 (NWC-037

Algorithm Theoretical Basis Document for the Wind product processor of the NWC/GEO

NWC/CDOP2/GEO/AEMET/SCI/ATBD/Wind, Issue 2, Rev. 1. Applicable to GEO-HRW v6.0 (NWC-038

NWCSAF/High resolution winds AMV software version 2018

Ponencias presentadas en: 14th International Winds Workshop celebradas en Jeju City, Corea de Sur, del 23 al 27 de abril de 2018.The “High Resolution Winds product (HRW)”, developed inside the “Satellite Application Facility on support to Nowcasting and very short range forecasting (NWCSAF)” standalone NWC/GEO software package, provides a detailed calculation of Atmospheric Motion Vectors and Trajectories locally and in real time by its users. Last operational version was released to users in November 2016 inside NWC/GEO v2016 software package. A new version of “High Resolution Winds product (HRW)”, is now being prepared and expected for release in the autumn 2018 inside NWC/GEO v2018 software package. Its main new features include: the calculation of AMVs and Trajectories with Himawari-8/9 satellite series, the auto-validation of the calculated AMVs during the running of the product against NWP forecast or analysis winds, the option to calculate larger densities of AMVs at low levels, and the option to mix several time frames for the AMV calculation (considering short time frames for the tracer tracking and large time frames for the displacement calculation). The common Quality Index and the new BUFR format for the AMV output files, such as defined by the International Winds Working Group, are also included for homogenization with other AMV products. A parallelization process is also to be included, to ease the processing of the product in larger regions

Algorithm Theoretical Basis Document for “High Resolution Winds” (HRW - PGE09 v4.0)

SAF/NWC/CDOP2/INM/SCI/ATBD/09, Issue 4, Rev.0This document is the Algorithm Theoretical Basis Document for the HRW product: the component of the SAFNWC/MSG software package for the calculation of High Resolution Winds (HRW), using up to seven MSG/SEVIRI channels: HRVIS (High Resolution Visible), VIS06 and VIS08 (Visible 0.6 mm and 0.8 mm), WV062 and WV073 (Water vapour 6.2 mm and 7.3 mm), IR108 and IR120 (Infrared 10.8 mm and 12.0 mm). It describes the HRW product objectives, the scientific algorithm, the needed input data and the resulting output. It also provides basic information on the algorithm implementation

NWC SAF/High Resolution Winds MV Software evolution between 2012 and 2014

Ponencia presentada en: 12th International Winds Workshop, Copenhagen, Denmark (15-20 June 2014)The "High Resolution Winds AMV software (HRW)", developed inside the "Satellite Application Facility on support to Nowcasting and very short range forecasting (NWC SAF)" stand alone software package, provides a detailed calculation of Atmospheric Motion Vectors locally and in real time by its users, considering up to seven MSG/SEVIRI channels. A new version of HRW software has been made available in August 2013 with some new elements: the calculation of trajectories through the continuous tracking of the same tracer, the update of the Quality control process, and the optimization of the algorithm for the default calculation without wind guess in the definition of the tracking area, among other ones. The validation shows additional improvements respect to previous versions, including the increase in the amount of available AMVs with a reduction in their NRMSVD values, and the usability of all AMVs with a QI ≥ 1%. HRW v2013 has been validated by external studies (the NWP SAF AMV monitoring by the MetOffice, and the Second AMV intercomparison study by CIMSS/University of Wisconsin), comparing very positively against other AMV algorithms. The MetOffice has also started to assimilate operationally HRW AMVs in its NWP mesoscale model around the British Isles with a positive impact in the forecast. Because of its characteristics and its ease to be obtained and run locally, NWC SAF/High Resolution Winds software has been proposed as option for “Stand alone AMV calculation software”, available to all AMV researchers and users. The good validation results for NWC SAF/HRW software by the external studies should solve any doubts about the usefulness of this AMV algorithm

Algorithm Theoretical Basis Document for the Wind product processors of the NWC/GEO

NWC/CDOP2/GEO/AEMET/SCI/ATBD/Wind, Issue 1, Rev.1. Applicable to GEO-HRW v5.0 (NWC-037

Impact of wind guess on the tracking of atmospheric motion vectors

The goal of this paper is to show the impact of the use of the wind guess (WG) in atmospheric motion vector (AMV) extraction schemes. The study has been performed using the Satellite Application Facility on Support to Nowcasting and Very Short Range Forecasting (NWCSAF) High Resolution Winds AMV software. Target box sizes varying from 8 × 8 to 40 × 40 pixels and temporal gaps varying from 5 to 60 min have been considered for two configurations that use WG and do not use the wind guess (NWG) to locate the search area in the tracking process. AMVs have been extracted for four different Meteosat Second Generation (MSG) Spinning Enhanced Visible and Infrared Imager (SEVIRI) channels [high-resolution visible (HRVIS), visible 0.8 μm (VIS0.8), water vapor 6.2 μm (WV6.2), and infrared 10.8 μm (IR10.8)] over the European and Mediterranean area for a 6-month period (January–June 2010). The AMVs’ performances have been tested against radiosonde wind observations and ECMWF NWP model wind analysis. The results show an impact on the amount of valid AMVs extracted by each configuration. Not using the wind guess produces more valid AMVs when large target boxes and short temporal gaps are used. It is the opposite when small target boxes and long temporal gaps are used. The results also show a general increase in the mean AMV speed, and a general reduction of the normalized bias and the normalized root-mean-square vector difference for all the tested channels and configurations, when the wind guess is not used to locate the search area