optical Antenna Gain. 2:Receiving Antennas. Errata John J. Degnan and Bernard J. Klein

NASA Goddard Space Flight Center, Greenbelt, Mary­land 20771. Received 27 September 1974. The quantity ω, incorrectly defined in the paper by Deg-

nan and Klein1 in the sentence containing Eq. (16), corre­sponds to the radius to the 1/e (not 1/e2) intensity point in the Gaussian local oscillator distribution. Please note that the latter definition is at variance with the more com­mon definition of ω as the radius to the 1/e field (l/e2 in­tensity) point. The traditional definition was used in Part 1 of our paper describing transmitted Gaussian beams.

References 1. J. J. Degnan and B. J. Klein, Appl. Opt. 13, 2397 (1974).

2762 APPLIED OPTICS / Vol. 13. No. 12 / December 1974