COMPUTING THE MODIFIED INDEX OF REFRACTION. M 



79 



;i(m) 



i 







10 



20 



30 



40 



50 



75 



100 



150 



200 



250 



300 



350 



400 



450 



500 



600 



700 



800 



900 



1,000 



1,500 



2,000 



10 



14.0 



Table 3C. H for t from -10 C ( + 14 F) to C (32 F); h to 2,000 m (6,562 ft), 

 po = 1,000 mb at sea level 



-9 



-8 



-0 



■1 



15.8 



17.6 



19.4 



21.2 



23.0 



24.S 



26.6 



2S.4 



30.2 



±0 



32.0 



/ h (ft) 



0.0 



32.8 



65.6 



98.4 



131.2 



164.0 



248.1 



328.1 



492.1 



656.2 



820.2 



984.3 



1,148.0 



1,312.0 



1,476.0 



1,640.0 



1,969.0 



2,297.0 



2,625.0 



2,953.0 



3,281.0 



4,921.0 



6,562.0 



x/i (ft) 

 <F\ 



h (m)\ 



i 







10 



20 



30 



40 



50 



75 



100 



150 



200 



250 



300 



350 



400 



450 



500 



600 



700 



800 



900 



1,000 



1,500 



2,000 



±0 



32.0 



Table 3D. H for / from C (32 F) to 10 C (50 F); h to 2,000 m (6,562 ft). 



pt, = 1,000 mb at sea level 



33.8 



35.6 



37.4 



39.2 



41.0 



42.8 



44.6 



46.4 



48.2 



10 



50.0 



//j(ft) 



0.0 



32.8 



65.6 



98.4 



131.2 



164.0 



248.1 



328.1 



492.1 



656.2 



820.2 



984.3 



1,148.0 



1,312.0 



1,476.0 



1,640.0 



1,969.0 



2,297.0 



2,625.0 



2,953.0 



3,281.0 



4,921.0 



6,562.0 



\A (ft) 

 /F\ 



