| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m12.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repository | sid.inpe.br/iris@1912/2005/07.20.06.27.44 (restricted access) |
| Last Update | 2007:10.10.19.09.02 (UTC) administrator |
| Metadata Repository | sid.inpe.br/iris@1912/2005/07.20.06.28 |
| Metadata Last Update | 2018:06.05.00.52.41 (UTC) administrator |
| Secondary Key | INPE-5926-PRE/2069 |
| ISSN | 0034-4257 |
| Label | 7315 |
| Citation Key | EpiphanioHuet:1995:DeNDSA |
| Title | Dependence of NDVI and SAVI on Sun/Sensor Geometry and its effect on fAPAR relationships in alfalfa  |
| Year | 1995 |
| Secondary Date | 19960428 |
| Month | Mar. |
| Access Date | 2024, Apr. 27 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 96 KiB |
| 2. Context | |
| Author | 1 Epiphanio, Jose Carlos Neves 2 Huete, A. R |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JHGM |
| Group | 1 DSR-INPE-MCT-BR |
| Affiliation | 1 2 UNIV ARIZONA, DEPT SOIL & WATER SCI, TUCSON, AZ |
| Journal | Remote Sensing of Environment |
| Volume | 51 |
| Number | 3 |
| Pages | 351-360 |
| History (UTC) | 2006-09-04 15:59:43 :: administrator -> jefferson :: 2007-10-10 19:14:53 :: jefferson -> administrator :: 2008-06-09 19:16:24 :: administrator -> jefferson :: 2010-07-07 18:52:00 :: jefferson -> marciana :: 2011-10-31 11:09:43 :: marciana -> administrator :: 1995 2018-06-05 00:52:41 :: administrator -> marciana :: 1995 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | AGRONOMIA photosynthetically active radiation leaf-area index spectral vegetation indexes corn canopies reflectance model yield par |
| Abstract | This article describes the impacts of sensor view and solar zenith angles on two vegetation indices - NDVI (normalized difference vegetation index)and SAVI (soil adjusted vegetation index). An evaluation of these geometric factors on the relationships between these VIs (vegetation indices)and fAPAR (fraction of photosynthetically active radiation absorbed by the canopy)was performed. To accomplish this, an experiment was conducted in Phoenix, Arizona, over plots of bare soil and low, medium, and high alfafa. Reflectances were measured from 0.4 um to 1.0 um in nine view angles (from -40 graus to +40 graus, in 10 graus steps)over varying solar zenith angles. This was done simultaneously with fAPAR measurements. Changes in view angle caused variations in the indices to be as high as 50 in relation to nadir. However, there was an opposite view angle behavior between NDVI and SAVI, with the former increasing from antisolar to forward scattering view direction. A derivative analysis of the indices showed the SAVI to exhibit a more linear relationship than NDVI with the individual bands. The relationships between both VIs and fAPAR were, in general, linear. However, view angle variations perturbed these relationships and caused an over- or underestimation of fAPAR, depending on view direction (antisolar or forward), view angle, and vegetation index (NDVI or SAVI). |
| Area | SRE |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > Dependence of NDVI... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | ScienceDirect - Remote Sensing of Environment Dependence of NDVI and SAVI on sun-sensor geometry and its effect on fAPAR relationships in Alfalfa.htm |
| User Group | administrator jefferson marciana |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher allowfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ER446E |
| Dissemination | WEBSCI; PORTALCAPES; MGA; COMPENDEX. |
| Host Collection | sid.inpe.br/banon/2001/04.06.10.52 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel doi e-mailaddress electronicmailaddress format identifier isbn lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |