Full text: Proceedings of the Symposium on Progress in Data Processing and Analysis

Horst Uleichelt (GDR) 
Some results of microwave measurements during the INTERCOSMOS 
complex experiments GEOEX, TELEGEO and CARIBE 
1. Introduction 
The main goals of the INTERCOSMOS complex experiments in the years 
1984 - 1988 were the acquisition of spectral object signatures 
from different altitudes for vegetation covered surfaces and 
soils. 
We used the radiometer facilities of the Central Institute for 
Physics of the Earth (CIPE) (fig. 1) which can either be operated 
by our mobile ground measuring complex or by aircraft missions 
(plane, helicopter) in low altitudes. An x-band microwave radio 
meter designed and manufactured by the Technical Highschool Ilme- 
nau (GDR) was integrated in the radiometer complex in 1986. This 
radiometer measures the microwave radiation emitted by the objects 
at a frequency of 10,4 GHz and a half width of 500 MHz. The angle 
of aperture is about 15°. 
For airborne and field missions the microwave radiometer has been 
installed in such a way to enable simultanous recording with the 
spectrometers operating in the VIS, NIR, SWIR and TIR part of the 
electromagnetic spectrum. 
Some results of the investigations conducted will be presented 
below. 
Z, Experiment GEOEX 
The experiment GEOEX was carried out on the territory of the GDR 
in July 1986. The radiometer complex was used on an agricultural 
test site (size about 2x5 km 2 ) north east of Potsdam (fig. 2). 
The area is typical with its landscape features for the internal 
lowland of the GDR. In the southern part of the area, crossed by 
the Havel channel, the groundwater is elevated up to near the 
surface level. Marshy soils in the center are typical, on the 
border, however, where fluvial sands are conserved by the 
glaciofluvial valleys, humus gleys could be found. In the northern 
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