46 



TRANSMISSION EXPERIMENTS AT ANTIGUA, WEST INDIES 



obtainable on both S and X bands, for either one-way 

 or two-way transmission. 



3. On S band, the highest combination of trans- 

 mitting and receiving antennas produces the strong- 

 est signal and the greatest range. 



4. On X band, the lowest combination of transmit- 

 ting and receiving antennas produces the strongest 



signal and the greatest range. 



5. Surface ducts in the trade wind regions can be 

 used for communication purposes to a conservative 

 range of 100 miles. Greater ranges are probable but 

 will require further investigation. 



6. Eain in the form of squalls does not appreciably 

 affect the received signal. 



