The dielectric constant and loss tangent of a variety of compounds of sol-gel PLZT have been studied at frequencies of up to 50 GHz. The method of investigation involves measuring microwave striplines with small parallel plate capacitors shunted to ground. Measured S-parameters are used to calculate dielectric properties. The data shows no significant dielectric dispersion mechanism in the 1 - 50 GHz range. It does appear that a moderate loss in dielectric constant is due to domain wall effects.

A Michelson interferometer spectrometer cooled to 10 degrees by liquid helium was flown into an IBC class III aurora on 1 April 1976 from Poker Flat, Alas. The sensor, HIRIS, covered the spectral range 455-2500 wave numbers (4-22 microm) with a spectral resolution of 1.8 cm(-1) and an NESR of 5 x 10-12 W/cm2 scrm(-1) at 1000 cm(-1). An atmospheric emission spectrum was obtained every 0.7 sec over an altitude range of 70-125 km. Atmospheric spectra were obtained of CO2 (nu3), NO (Deltanu = 1), O3 (nu3) and CO2 (nu2). Auroral produced excitations were observed for each band, this being the first known measurement of auroral enhancements of O3 (nu3), 9.6 microm, and CO2 (nu2), 15 microm, emissions.

The total cross section for the coherent photopair production of charged, semiweakly interacting vector bosons in the Coulomb field of the nucleon Fe/sup 56/ was calculated in the lowest order perturbation theory. (C.E.S.)