sufficient for this purpose; they only make a relative estimate of 
the amount of solar radiation reaching the ground. The influences 
on the surface temperature are much more complex. Only the 
airborne data are of sufficient resolution for fire modelling but if a 
way could be found to use these data directly in the thermal 
models, it would be possible to construct approximate models, at 
least, for many more fires. We would then have a complete 
remote sensing-based coal fire detection and measurement 
system. 
ACKNOWLEDGEMENTS 
The authors would like to thank members of the ARSC and of the 
Institute of Physical Geography, University of Freiburg, Germany 
for their assistance, particularly with the fieldwork. 
This research is funded by the European Commission under 
contract nos. P2034552 and P2036005. 
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