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Detection of Pollution in Water Bodies 
A project to map the circulation patterns of the Guanabara 
Bay is being developed. The localization of sources of pollution and its 
behavior is also being done. The problem of pollution in the Guanabara 
Bay is of extreme importance since it affects considerably the quality 
of life in the cities of Rio de Janeiro and Niteroi 
3. PROJET RADAMBRASIL 
The purposé of the RADAMBRASIL Project is to survey natural 
resources of the entire brazilian territory in a level of detail compatible 
with a scale of 1:1,000,000. The basic source of information for the execu 
tion of this task is the imagery of the GEMS 1000 synthetic aperture side 
looking-radar from Goodyear Corp. This radar operates at 9.6 GHz (approx. 
3 cm wavelength) with a horizontal/horizontal polarization. The resolution 
of the first generation film product is better than 20 m. 
The imaging of the whole nation was concluded in the begin 
ning of 1976. The radar was installed in a Caravelle twin jet, allowing a 
flying altitude of 11,000m which permitted the coverage of 37 km wide strips 
for each flight line. 
The initial photographic product of the radar is an image at 
the scale 1:400,000 which is enlarged to 1:250,000 and used for interpret 
ation work. Later, the interpretation is reduced to 1:1,000,000 for publi 
cation. 
The aircraft also carried two photographic cameras which took 
color infrared and multispectral exposures where cloud coverage permitted. 
These photographs and Landsat imagery are also being used in the interpret 
ation work. 
The final products of the project are: 
e Planimetric maps at 1:250,000 scale;