226 



SYNOPTIC RADIO METEOROLOGY 



-500 500 



DISTANCE FROM FRONT IN KILOMETERS 



Figure 5.63. Epoch chart, Little Rock, Ark., in A units. 



1000 1700 



[19] Gray, R. E. (1961), Tropospheric scatter propagation and meteorological condi- 

 tions in the Caribbean, IRE Trans. Ant. Prop. AP-9, No. 5, 492-496. 



[20] Bean, B. R., and G. D. Thayer (1959), On models of the atmospheric radio 

 refractive index, Proc. IRE 47, No. 5, 740-755. 



[21] Schulkin, M. (1952), Average radio-ray refraction in the lower atmosphere, Proc. 

 IRE 40, No. 5, 554-561. 



[22] Fannin, B. M., and K. H. Jehn (1957), A study of radio elevation angle error due 

 to atmospheric refraction, IRE Trans. Ant. Prop. AP-2, No. 1, 71-77. 



[23] Bean, B. R., J. D. Horn, and L. P. Riggs (1960), Refraction of radio waves at 

 low angles within various air masses, J. Geophys. Res. 65, 1183. 



[24] Arvola, W. A. (1957), Refractive index profiles and associated synoptic patterns, 

 Bull. Am. Meteorol. Soc. 38, No. 4, 212-220. 



[25] Jehn, K. H. (1960), The use of potential refractive index in synoptic-scale radio 

 meteorology, J. Meteorol. 17, 264. 



[26] Lukes, G. D. (1944), Radio meteorological forecasting by means of the thermo- 

 dynamics of the modified refractive index, Third Conf. Prop., NDRC, pp. 

 107-113 (Committee on Propagation, Washington, D.C.). 



[27] Katz, I. (1951), Gradient of refractive modulus in homogeneous air, potential 

 modulus, Book, Propagation of Short Radio Waves, pp. 198-199 (McGraw- 

 Hill Book Co., Inc., New York, N.Y.). 



[28] Jehn, K. H. (1960), Microwave refractive index distributions associated with 

 the Texas-Gulf cyclone, Bull. Am. Meteorol. Soc. 41, 304-312. 



