Discussion 



A preference for C-band has been established by all study 

 teams. No team considered L-band to be totally 

 unacceptable and Renewable Land Resources has expressed a 

 requirement for an additional L-band channel with a steep 

 (20°) incidence angle. The dual-f reuqency, 4-channel 

 system deemed necessary by Renewable Land Resources will 

 also meet the stereo requirements of Nonrenewable Land 

 Resources and is obviously acceptable to other teams; 

 thus, it must be considered optimal. The recently 

 proposed concept of a fixed +.5 steerable antenna 

 increases the effective swath width over specific areas 

 (to be discussed later), and could provide the desired 

 incidence angle range, albeit without simultaneous cover. 

 A single-channel system with C-band at 40° to 45° 

 incidence angle will meet most requirements of all but the 

 oceans group. 



2, Polarization 



The polarization requirements by applications teams is summarized 

 as follows: 



a. Renewable Land Resources 



There is a very weak preference for VV polarization. HH 

 is acceptable for all applications. 



b. Nonrenewable Land Resources 



HH polarization is preferred at both 50° and 30° incidence 

 angles. An optional channel at HV polarization, 30°- 

 incidence angle, may provide additional information on 

 moisture in soils and rocks and assist in the 

 identification of vegetation types. 



c. Ice 



HH polarization is desirable. VV polarization and/or 

 cross-polarization are marginally acceptable and 

 unacceptable respectively. 



d. Oceans 



HH is the only polarization considered. 



5-9 



