46 MEASURING THE RADIO REFRACTIVE INDEX 



Adey, A. W. (1957), Microwave refractometer cavity design, Can. J. Tech. 34, 

 519-521. 



Thompson, M. C, Jr., F. E. Freethey, and D. M. Waters (July 1959), End plate 

 modification of A'-band TE cavity resonators, IRE Trans. Microwave Theory 

 Tech. MTT-7, No. 3, 388-389. 



Herbstreit, J. W. (July 1960), Radio refractometry, NBS Tech. Note 66. 



Birnbaum, G. (Apr. 1951), Fluctuations in the refractive index of the atmosphere 

 at microwave frequencies, Phys. Rev. 82, 110-111. 



Birnbaum, G., and H. E. Bussey (Oct. 1955), Amplitude, scale, and spectrum of 

 refractive index inhomogeneities in the first 125 meters of the atmosphere, 

 Proc. IRE 43, 1412-1418. 



Grain, C. M., and A. P. Deam (Aug. 1951), Measurement of Tropospheric Index 

 of Refraction Profiles with an Airplane-Carried Direct Reading Refractometer, 

 Electrical Engineering Research Laboratory, University of Texas, Austin, Tex. 



Grain, C. M. (Oct. 1955), Survey of airborne microwave refractometer measure- 

 ments, Proc. IRE 43, No. 10, 1405-1411. 



Grain, G. M. (May 1950), Apparatus for recording fluctuations in the refractive 

 index of the atmosphere at 3.2 centimeter wavelength. Rev. Sci. Instr. 21, 

 No. 5, 456-457. 



Pound, R. V. (Nov. 1946), Electronic frequency stabilization of microwave 

 oscillators, Rev. Sci. Instr. 17, No. 11, 490-505. 



Birnbaum, G. (Feb. 1950), A recording microwave refractometer, Rev. Sci. 

 Instr. 21, No. 2, 164-176. 



Murray, G., and T. B. Watkins (Apr. 1957), Automatic frequency control, U.S. 

 Patent 2,788,445. Filed Feb. 5, 1952, granted Apr. 9, 1957. 



Silsbee, R. H. (Jan. 1956), A high sensitivity paramagnetic resonance spectrom- 

 eter, Gruft Lab. Tech. Report 221, Harvard Univ., Cambridge, Mass. 



Jung, P. (Oct. 1960), Transistorized frequency stabilization for reflex klystrons 

 used in magnetic resonance, J. Sci. Instr. 37, 372-374. 



Smith, M. J. A. (Oct. 1960), Frequency stabihzation of klystrons, J. Sci. Instr. 37, 

 398-399. 



Deam, A. P. (May 1959), An expendable atmospheric radio refractometer, EERL 

 Report 108, Univ. of Texas, Austin, Tex. 



Deam, A. P., and C. F. Cole, Jr. (Jan. 1960), Development of a lightweight 

 expendable microwave refractometer, EERL Report 5-46, Univ. of Texas, 

 Austin, Tex. 



Hay, D. R., H. C. Martin, and H. E. Turner (June 1961), Lightweight refrac- 

 tometer. Rev. Sci. Instr. 32, No. 11, 693-697. 



Wagner, N. K. (July 1960), An analysis of radiosonde effects on measured fre- 

 quency of occurrence of ducting layers, J. Geophys. Res. 65, 2077-2085. 



Clarke, L. G. (1960), Theory of atmospheric refraction. Part II of Meteorological 

 Aspects of Radio-Radar Propagation, pp. 31-82, NWRF3 1-0660-035 (U.S. 

 Navy Weather Research Facility, Norfolk, Va.). 



Dunmore, F. W. (1938), An electric hygrometer and its application to radio 

 meteorography, J. Res. NBS 20, 723-744. 



Bunker, A. F. (1953), On the determination of moisture gradients from radiosonde 

 records, Bull. Am. Meteorol. Soc. 34, 406-409. 



Middleton, W. E. K., and A. F. Spilhaus (1953), Book, Meteorological Instru- 

 ments, p. 63 (Univ. of Toronto Press, Toronto, Canada). 



Sion, E. E. (Jan. 1955), Time constants of radiosonde thermistors. Bull. Am. 

 Meteorol. Soc. 36, 16-21. 



Wexler, A., S. Garfinkel, F. Jones, S. Hasegawa, and A. Krinsky (Aug. 1955), 

 A fast responding electric hygrometer, J. Res. NBS 55, 71-78. 



