POWER SPECTRA AND NOISE-REDUCING QUALITIES OF LASA BEAMS
Abstract
Noise power levels at 1 cps were found to be about the same on outputs of E3 subarray beams composed of 18, 19, and 25 elements. This is attributed either to a higher average input noise level for the 25-element beam, or to the possibility that noise is more highly correlated between the additional channels of the larger beam. In those cases where the number of short-period beam inputs is held constant at 7 and spacing between adjacent sensors is changed progressively from 3 to 9.5 kilometers, noise power at 1 cps is reduced approximately by a factor of N for spacings equal to or greater than 6 kilometers. If the number of long-period inputs to a beam is held constant at either 5 or 9 and spacing between adjacent sensors is changed progressively from 10 to 60 kilometers, the average rms level at the input and the noise based on zero-lag correlations are reduced approximately by a factor of N to the 1/2 power for spacings greater than 20-30 km.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 06, 1967
- Accession Number
- AD0824375
Entities
People
- R. A. Hartenberger
Organizations
- Teledyne Technologies