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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