particular expenses and öften one time data gain for mostly non-applicable and 
only research purposes this approach leads to multiple and repetitive data gain 
immediately applicable in decision making for environmental protection and life 
improvement of the local population, 
9, Conclusions 
With low cost.and simple self constructed equipment,consisting of a multi-band 
radiometer,commercial camera with mounting accessories,pocket or desk computer 
and a periodic evaluation of machine processed satellite images and ground truth 
flights a long termed repetitive monitoring of the environment in tropical zones 
will be possible. 
In combination with extended terrestrial reflectance and climatological measure- 
ments over the whole year base datas can be gained for the ecology of a re- 
spective region. As the monitored area is inaccessible the sample datas should 
be coliected in an accessible area with similar environment as far as ground 
truth datas are concerned. 
Finally the exspected data gain will be larger than by a one time high accurate 
observation with sophisticated equipment mounted on a high altitude flying air- 
craft,always susceptible to troubles and brake downs in the tropics. 
10. References 
- A.van Dijk,D.C.P.Thalen and I.S.Zonneveld,The application of satellite 
multi-spectral scanning in Land survey,Preliminary experiments with optical 
and digital image processing of an area near Kahama , Tanzania ,Dec.1977, 
ITC Enschede : 
- B.King,Remote sensing manual of Tanzania ,BRALUP,University of Dar-es-Salaam 
Overseas Development Administration,Surbiton,Surrey,GB 
- L. Berry,A.Rapp,P.Temple,Studies of soil erosion and sedimentation in Tanza- 
nia,BRALUP,Research Monograph No.1,1973 
- W.M.C. Mueksch,The determination of evapotranspiration in semi-humid zones 
of East-Africa by combined terrestrial and aerial infrared observation, 
ISP Colloque International des Signatures spectrales d'objects en télédé- 
tection,I.N.R.A. and C.N.E.S.,Avignon(France),1981 
- W.M.C. Mueksch,Hydrograph simulation and analysis from LANDSAT-imagery of 
tropical zones,IGARRS'82,Munich(West Germany),1982 
- W. Müksch,Die Verwendbarkeit von LANDSAT-MSS-Bildern bei landwirtschaftli- 
chen Planungen in tropischen Sumpf-und Regenwaldzonen,Bildmessung und 
Luftbildwesen,Photogrammetrie und Fernerkundung,BuL 6/1979,47 Jhrg. 
460 
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