ibuted 
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ns to cover 
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he west 
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on the 
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nitrogen 
account 
. masses, 
    
- 1195 - 
3: satellite screening of the complete Baltic has to be coordinated with 
ground truth data. 
We conclude then, that calculation of the amount of nitrogen added to 
the nitrogen household of the Baltic sea by action of the blue green algae, 
seems to be worthwhile, however, reliable data, to compare with and to 
correct present estimates"), can be achieved only after future coordination 
of satellite coverage of the Baltic with the acquisition of adequate ground 
truth data.