1 / 19

TECO - 2012 | Brussels (Belgium) | 16-18 October 2012

Automatic observation of cloudiness: Analysis of all-sky images Yézer González 1 César López 1 Emilio Cuevas 2 1. Sieltec Canarias S.L. 3. Izaña Atmospheric Research Center (AEMET) Spain. TECO - 2012 | Brussels (Belgium) | 16-18 October 2012.

wood
Télécharger la présentation

TECO - 2012 | Brussels (Belgium) | 16-18 October 2012

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Automatic observation of cloudiness: Analysis of all-sky imagesYézer González1César López1Emilio Cuevas21. Sieltec Canarias S.L.3. Izaña Atmospheric Research Center (AEMET) Spain TECO - 2012 | Brussels (Belgium) | 16-18 October 2012 TECO - 2012 | Brussels (Belgium) | 16-18 October 2012

  2. The influence of clouds on Earth´s radiation balance is a key component of the atmospheric system. • Cloud monitoring is important for aeronautical purposes and weather forecast. Cloud cover estimation • Cloud coverestimationisanactivitytraditionallyperformedbyhumanobservations.Theseobservations are subjecttosubjectiveerrors. • Poor espacial and temporal resolution. Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  3. SONA Automatic System of Cloud Observation - CCD sensor. 640x480 pixels, 8 bit, color response from 400 to 700nm and monochrome response from 400 to 1000nm. - Very durable aluminium housing. - Borosilitate dome. - Rotating shadow band. - Cooling/heating system (-10º to +50ºC). - Fast frame rates (up to 70 fps). - Adjustable JPEG compressed still-images or live MJPEG streaming video. - Transfer of images via FTP, RTP or HTTP. - Camera control via HTTP, XML-RPC, Telnet SONA features Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  4. SONA Automatic System of Cloud Observation SONAs in Spain Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  5. The site SONA has been developed and tested at the Izaña Atmospheric Observatory (IZO; 28.5ºN 16ºW; 2,400 m a.s.l.) IZO is a Global Atmospheric Watch (GAW) observatory (www.aemet.izana.org) of global importance with a complete atmospheric components measurement program. Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  6. Cloud Detection Procedure Accurate cloud detection and monitoring is a challenge Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  7. Cloud Detection Procedure Accurate cloud detection and monitoring is a complex problem (A) Biological neuron. (B) Computer neuron model or perceptron. (C) Multilayer neural network with and input layer, two hidden neuron layers and a neuron output layer. Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  8. Cloud Detection Procedure Calibration and training Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  9. Cloud Detection Procedure Detection Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  10. Cloud Detection Procedure Image cloud detection in progress… Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  11. Multiphoto analysis Saharan dust Aerosols and Haze Single photo analysis More uncorrelated inputs Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  12. Original photo Single analysis Multiphoto analysis Aerosols and Haze Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  13. Results SONA vs. human observations Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  14. Ongoing and Future Activities SONA + photovoltaic system Cloud Nowcasting Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  15. Cloud flowdetermination Implementlastdevelopments of High Resolution Winds Products (Atmospheric motion vectors -AMVs- from MSG/HRVIS) achievedbyNWC SAF. Goal: perform cloud nowcasting using allsky camera images. Ongoing and Future Activities J. García-Pereda AEMET Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  16. Ongoing and Future Activities Cloud Type Cloud Mask Cloud Nowcasting.NWC SAF products Cloud Top Height Cloud Top Pressure Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  17. Ongoing and Future Activities Cloud base heightestimation Goal: Estimatetype of clouds and corresponding solar radiationattenuationcoefficients Two SONA cameras Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  18. Acknowledgements SONA project has received a grant from Consejería de Hacienda, Canary Islands Government, FEDER funds. CIAI´s Basic System Unit (Ramón Ramos, Rubén del Campo, Cándida Hernández, Virgilio Carreño, Fernando de Ory, Enrique Reyes, Antonio Cruz, Rocío López y Néstor Castro) NWC SAF information for cloud Nowcasting Engineers and technicians from SIELTEC Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

  19. Thank You Automatic observation of cloudiness: Analysis of all-sky images Yézer González, César López and Emilio Cuevas TECO-2012 | Brussels | 16-18 October 2012

More Related