| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m12.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YD6/JANJ2 |
| Repository | sid.inpe.br/iris@1912/2005/12.28.16.14 |
| Last Update | 2006:07.14.12.24.20 (UTC) administrator |
| Metadata Repository | sid.inpe.br/iris@1912/2005/12.28.16.14.46 |
| Metadata Last Update | 2022:03.26.17.59.40 (UTC) administrator |
| Secondary Key | INPE-13954-PRE/9130 |
| ISSN | 0739-0572 |
| Citation Key | Souza-EcherPereBinsAndr:2006:SiMeAs |
| Title | A simple method for the assesment of the cloud cover state in high latitude regions by a ground based Ddgital camera  |
| Year | 2006 |
| Secondary Date | 20060714 |
| Month | Mar. |
| Access Date | 2024, May 16 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 1100 KiB |
| 2. Context | |
| Author | 1 Souza-Echer, M. P. 2 Pereira, Enio Bueno 3 Bins, Leonardo Sant' Anna 4 Andrade, M. A. R. |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JH2E |
| Group | 1 DSR-INPE-MCT-BR 2 DMA-INPE-MCT-BR 3 DSR-INPE-MCT-BR 4 DPI-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE), Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) 2 Instituto Nacional de Pesquisas Espaciais (INPE), Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) 3 Instituto Nacional de Pesquisas Espaciais (INPE), Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) 4 Instituto Nacional de Pesquisas Espaciais (INPE), Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) |
| e-Mail Address | atus@cptec.inpe.br |
| Journal | Journal of Atmospheric and Oceanic Technology |
| Volume | 23 |
| Number | 3 |
| Pages | 437-447 |
| History (UTC) | 2006-08-03 14:25:11 :: marciana -> administrator :: 2006-09-03 21:43:21 :: administrator -> marciana :: 2007-03-22 17:27:59 :: marciana -> administrator :: 2022-03-26 17:59:40 :: administrator -> marciana :: 2006 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | high-latitude digital camera geostationary operational environmental satellite meteorological satellite national oceanic nimbus |
| Abstract | This work describes the development of a simple method of field estimating the sky cloud coverage percentage for several applications at the Brazilian Antartic Station, Ferraz (62º 05S, 58º 23.5W). The database of this method was acquired by a digital color camera in the visible range of the spectrum. A new algorithm was developed to classify each pixel according to a criteria decision process. The information on the pixel contamination by clouds was obtained from the saturation component of the intensity, hue, and saturation space (IHS). For simplicity, the images were acquired with a limited field of view of 36º pointing to the cameras zenith to prevent direct sunlight from reaching the internal charge-coupled device (CCD) on the camera. For a priori-classified clear-sky images, the accuracy of the method was superior to 94%. For overcast-sky conditions, the corresponding accuracy was larger than 99%. A comparison test was performed with two human observers and our method. The results for the 29 images collected for several time of days during 50 days in 1999 summer were compared to visual observations of these same digital images by two trained field meteorologists. Correlation coefficients between human observers and the automatic method ranged from 0.84 for clear-sky conditions, and the lowest was 0.09 for undefined-sky conditions. |
| Area | SRE |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDPI > A simple method... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > A simple method... |
| Arrangement 3 | urlib.net > BDMCI > Fonds > Produção até 2016 > DMA > A simple method... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/6qtX3pFwXQZ3r59YD6/JANJ2 |
| zipped data URL | http://urlib.net/zip/6qtX3pFwXQZ3r59YD6/JANJ2 |
| Language | en |
| Target File | a simple.pereira.pdf |
| User Group | administrator marciana |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher6 allowfinaldraft |
| Read Permission | allow from all |
| Update Permission | transferred to marciana |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EQCCU5 8JMKD3MGPCW/3ER446E 8JMKD3MGPCW/46JKC45 |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.45.21 3 |
| Dissemination | WEBSCI; PORTALCAPES. |
| Host Collection | sid.inpe.br/banon/2001/04.06.10.52 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel doi electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |