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During the scanning process there occur more distortions of the 
original data. These are, for instance, smearings of the structu 
red objects in the image, which characterize the system-PSF and 
the noise of the detector and the connected electronics. To 
recover the originals from these distorted images a method is 
used for restauration and smoothing /8/. A local filter, which 
works with a 7x7 picture enhances the structures in the image. 
But this filter amplifies also the noise. The following smoothing 
filter suppresses this noise and improves the signal-to-noise 
ratio. 
With the help of an UMK-camera, which worked parallel to the 
TIR-scanner, we obtained panchomatic photografics of the area, 
which were scanned by the TIR-scanner. These have a three times 
higher spatial resolution then the TIR-images. In these panchro 
matic images are much more details and so they are used for the 
interpretation of the TIR-images. With an affined mapping 
(ref./9/) the TIR-images were embedded into the panchromatic 
images. Fig.8 shows such an image. In this TIR-image no geometric 
corrections are made. That means, an improved adaption of the 
images in lines is not possible. 
Interpretation of the data, results 
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First, methodical investigations were made to compare the spatial 
and thermal resolution of the scanner .with the data measured in 
the laboratory. Furthermore, the influence of the scanning-system 
to the data was investigated. Corresponding to this aim, the 
areas were selected, which were scanned. For the investigation of 
the spatial resolution a part of the airport Berlin Schonefeld 
was scanned. This is a very well structured area. Fig.9 shows the 
runways, which have a higher temperature then the surroundings. 
The geometrical distortions caused by variations in platform 
attitude are very well visible. The edges of the runways 
exactly, there are no smearings. That means, that the 
resolution of the scanner is approximately one pixel. 
For the investigation of the thermal resolution of the scanner, 
the lake Muggelsee, a large, homogeneous area, with small diffe 
rences of temperature was scanned. Fig.10 shows, how slowly the 
inflowing water is mixing with the colder water 
Simultaneously to the flight of the aircraft, the 
ture of the lake from a ship was measured. The 
scanned data with the measured values shows, that 
on of the temperature in the image is the same as 
are very 
spatial 
of the lake, 
water tempera- 
comparision of 
the distributi- 
the measured 
values in the lake, except an offset, caused by the influence of 
the atmosphere. So it is shown, that the thermal resolution of 
the scanner is near 0.1K. 
In commission of the Institute of Environment Protection the 
river Elbe between the towns Wittenberg and Barby was scanned 
with the TIR-scanner. The aim was to identify known and unknown 
industrial inflows into the river. Such inflows have a little 
higher temperature than the water of the river. Therefore a