KAREKKAREK
Quicklooks
of July'97 Datatakes available!
For the recultivation of open lignite pits the ongoing processes and the mineralogical composition of the dumped material have to be investigated. Due to oxidation of Pyrite acid water is generated and can lead to the decomposition and instability of the sediments. The major fraction of the substrate is Quartz, followed by Feldspars (Na- and K-Feldspar), Clayminerals, Pyrite and organic matter. In the frame of a research project funded by the German Ministry of Education and Research (BMBF) hyperspectral data is used to derive detailed geochemical information of the sediments.
On May 30th 1996 DAIS 7915 data was aqcuired from the open pit Zwenkau.The data sets have been atmospherically and geometrically corrected (ATCOR). Geocoding was carried out using a non-parametric approach. Evaluation and validation of the data will be carried out using ground measurements.
Lignite Mine 'Zwenkau' R/G/B
{0.82, 0.56, 0.51 µm} 
Due to high amounts of Quartz and Feldspars (Na- and K-rich) parts of the
mine (Dump1 and Dump2) yield no major spectral differences within the shortwave
infrared (above right).
The DAIS 7915 is equipped with 6 thermal infrared channels (8.6-12.3 µm). Silicate minerals show distinctive spectral features in this wavelenght region. The emissivity spectra of two dumped materials and vegetation can be easily separated (bottom left). The correlation of both dump spectra and a Quartz spectrum is high. Dominating amounts of Quartz in the substrates are expected. Other components like Feldspars and Clayminerals also influence the shape of the spectra (right).
DAIS 7915 hyperspectral data show high potential for mapping of open pit mining areas because both shortwave infrared and thermal spectral information is provided which reveals complementary geochemical information.
In 1997 a new DAIS 7915 campaign is forseen for the ZWENKAU
dump including night time thermal data acquistion and data takes at different
altitudes.
The first data take took place on July 23rd 1997. Specifications of the
acquired scenes and raw data quicklooks can be found below.
| DATE | TITLE | C | TIME | ALT. | HED. | SF | ROWS | COMMENT | QLOOK |
|---|---|---|---|---|---|---|---|---|---|
| 970723 | ZWENKAU1 | 1 | 10:14 | 3500 | 25 | 12 | 2472 | no clouds, hazy | p02i99c1h12_f02_raw |
| 970723 | ZWENKAU2 | 1 | 10:29 | 1980 | 32 | 19 | 2442 | hazy | p03i05c1h19_f03_raw |
These study is funded by the BMBF (German Ministry of Education and Research) under contract # 02WB9667/5, KAREK
Other Project partners are:
For more information see our publications list or contact: Andreas.Mueller@dlr.de
