77 
ACQUISITION, VALIDATION, SIMULATION, CALIBRATION 
S.R. Brooks, 
D.J. Smith, 
Marconi Research Centre, GEC Research Laboratories. 
UK. 
se Bruzzi, 
Earthnet, ESRIN, Frascanti, 
Italy, 
Commission Number II 
ABSTRACT 
À survey of some recent developments in acquisition, validation, 
simulation, and calibration is made. Particular reference is made to 
synthetic aperture radar data. The paper refers to the continuing 
activity of Earthnet at ESRIN. This activity has involved the SEASAT, 
and European SAR-580 campaign data sets as a test of procedures 
directed towards the pre-operational ERS-1 radar.