The Effect of the Number and Spacing of Elements on the Efficiency of LASA Beams: Supplement
Seismic data lab. rept.
TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV
Pagination or Media Count:
A previous report described the average signal loss, rms noise reduction, and SN gain produced by beam-forming eight teleseismic events two different ways. After publication of the report the analysis was extended to include beams containing 17 channels delta greater than or equal to 12 km, 34 delta greater than or equal to 6 km, 68 delta greater than or equal to 3.5 km, and 119 channels delta greater than or equal to 3.0 km. The study was still further extended by forming LASA beams containing 336 traces delta greater than or equal to 1 km derived from the 21 subarrays. In these beams, outputs from sensors in the B and C rings of each subarray a total of 9 per subarray were not used.