| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m12.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YD6/GPc9F |
| Repository | sid.inpe.br/iris@1912/2005/07.20.06.26.40 (restricted access) |
| Last Update | 2007:10.10.19.26.10 (UTC) marciana |
| Metadata Repository | sid.inpe.br/iris@1912/2005/07.20.06.27 |
| Metadata Last Update | 2018:06.05.00.52.41 (UTC) administrator |
| Secondary Key | INPE-5925-PRE/2068 |
| DOI | 10.1016/0034-4257(95)00040-8 |
| ISSN | 0034-4257 |
| Label | 7314 |
| Citation Key | GalvãoVitoPara:1995:SpDiLa |
| Title | Spectroradiometric discrimination of laterites with principal components analysis and additive modeling  |
| Year | 1995 |
| Month | Aug. |
| Access Date | 2024, May 19 |
| Type of Work | journal article |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 620 KiB |
| 2. Context | |
| Author | 1 Galvão, Lenio Soares 2 Vitorello, Icaro 3 Paradella, Waldir Renato |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JHD6 3 8JMKD3MGP5W/3C9JJBT |
| Group | 1 DSR-INPE-MCT-BR 2 DSR-INPE-MCT-BR 3 DSR-INPE-MCT-BR |
| Journal | Remote Sensing of Environment |
| Volume | 53 |
| Number | 2 |
| Pages | 70-75 |
| History (UTC) | 2006-09-04 15:59:42 :: administrator -> jefferson :: 2007-10-10 19:26:11 :: jefferson -> administrator :: 2008-06-09 19:16:23 :: administrator -> jefferson :: 2010-07-07 18:52:00 :: jefferson -> marciana :: 2011-10-31 11:26:59 :: marciana -> administrator :: 1995 2016-06-04 23:29:33 :: administrator -> marciana :: 1995 2016-09-12 17:03:25 :: 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 | ferric phosphate mineral titanium additive modeling additive modelling laterite mineral exploration principal component analysis principal components analysis remote sensing spectral analysis Brazil infrared radiation model principal component analysis radiation detector rock spectroscopy spectrum Brazil Maicuru |
| Abstract | Bidirectional reflectance factor determinations in the visible and and near-infrared of mineralized laterite samples collected at the surface of the alkaline/ultramafic rockscarbonative complex of Maicuru, northern Brazil, were evaluated for iron, phosphate, and titanium content. Nineteen spectra were subjected to principal components analysis in order to get a better insight into the factors affecting spectral discrination. The spatial distribution in a PC1 vs. PC2 plot is related to the overall reflectance (albedo)along the PC1 axis and to the spectral inversion around 1100 nm along the PC2 axis. The latter can be characterized by any spectral ratio of reflectance values taken before and after the inversion wavelength. Two major groups were thus identified: titanium-rich (anatase, ilmenite)laterites and aluminum phosphate laterites. The former presented spectra with low to intermediate albedos and lower near-infrared/visible and very near-infrared reflectance ratio values. The phosphate-rich samples presented intermediate to high albedos and higher reflectance ratios. Titaniferous laterites have a greater content of opaques than the phosphates which are usually richer in iron oxides. The presence of titanium lowers the albedo whereas iron oxides absorb only in the visible and very near-infrared. Binary mixtures of Fe2 O3 and carbon provided spectral variations analogous to the ones observed in the titaniferous laterites. Such modeling helped in evaluating the effects of opaques. As a practical result, a band radiometer could conceivably identify the titanium mineralized areas in the field. |
| Area | SRE |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > Spectroradiometric discrimination of... |
| 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 | sdarticle.pdf |
| User Group | administrator jefferson marciana |
| Reader Group | administrator 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 |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.50.10 1 |
| Dissemination | WEBSCI; PORTALCAPES; MGA; COMPENDEX. |
| Host Collection | sid.inpe.br/banon/2001/04.06.10.52 |
| 6. Notes | |
| Empty Fields | affiliation alternatejournal archivist callnumber copyright creatorhistory descriptionlevel e-mailaddress electronicmailaddress format isbn lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |