Table 7. Sea Ice 



Parameter 



Frequency 

 Incidence angle 



Polarization 

 Swath width 



Area cover 



Revisit interval 



Spatial 

 resolution 



Geometric 

 positioning 



Type of data 

 Process time 



Calibration 



Radiometric 

 resolution 



S/N ratio 



Dynamic range 



Secondary 

 sensors 



Requirements 



Optimal 



C-band 



40°-50° value 

 attached to steerable 

 antenna in lower latitudes 



RH 



200 km or more 



(100 km if steerable 



antenna) 



For operations, all 

 Canadian ice covered and 

 ice infested water, 

 global for scientific 



Operations, daily or more 

 often scientific; 1-5 days 



25 m 



±250 m 



Radiometrically corrected 

 digital tape 



3 hours or less operation- 

 ally several weeks for 

 science 



Relative ±2 dB 



Not specified 



Hot specified 



Not specified 



Passive microwave radiom- 

 eter and scatterometer 



Acceptable 



C- or L-band 

 25°-50° 



HH or W 



200 km 



All Canadian 

 ice covered 

 waters north 

 of 60° 



Operations, 

 daily scien- 

 tific, 1-5 days 



Low ^100 m, 

 high 25 m 



Same 



Same 

 Same 



Same 



Not specified 



Kot specified 



Not specified 



Passive 



microwave 



radiometer 



Marginal 



Same 

 <25° 



Same 

 <180 km 



Same 



Same 



>100 m 

 Same 

 Optical 

 Same 



Same 



Not specified 



Not specified 

 Not specified 

 SAR only 



^Parameters listed in this table apply to the following: sea ice distribution 

 and surface characteristics; ice types; ice movement; convergence and diver- 

 gence; and ice/water boundaries as a step in determining concentration. 



5-5 



