Bruce M. Howe
Brian D. Dushaw
James A. Mercer
Robert I. Odom
Robert C. Spindel
Appl. Phys. Lab., Univ. of Washington, Seattle, WA 98105
Peter F. Worcester
John Colosi
Bruce D. Cornuelle
Matthew Dzieciuch
Scripps Inst. of Oceanog., Univ. of California at San Diego, La Jolla, CA 92093
Arthur B. Baggeroer
MIT, Cambridge, MA 02139
Ted Birdsall
Kurt Metzger
Univ. of Michigan, Ann Arbor, MI 48109
Gary Bold
Sze Tan
Chris Tindle
Univ. of Auckland, Auckland, New Zealand
Michael Guthrie
Defense Scientific Establishment, Auckland, New Zealand
A low-frequency acoustic source suspended from R/P FLIP approximately 340 nautical miles WSW of San Diego transmitted to receivers 90 to 10 000 km distant during the Acoustic Engineering Test of the Acoustic Thermometry of Ocean Climate (ATOC) Program. The source was suspended for 7 days during November 1994 near the depth of the sound channel axis (about 650 m) in water over 4000 m deep, in order to avoid near-source bottom interactions. The source transmitted a phase-coded m-sequence with a center frequency of 75 Hz and a digit length of 27 ms [Metzger et al., this meeting]. Measured receptions on five bottom-mounted SOSUS receivers at ranges from 300--4000 km, on two vertical line array receivers at ranges of 90 and 3300 km, and on a sonobuoy modified to have the hydrophone on the sound channel axis at about 10 000-km range, are compared with ray theoretic, adiabatic normal mode, and broadband parabolic equation predictions. [Work supported by the Strategic Environmental Research and Development Program through ARPA.]