| Popis: |
The properties of noise‐dominated tau‐Doppler acoustic data bases were examined in relation to data base management requirements. Volume, rate of arrival, rate of aging, and distribution over different fields were among the characteristics studied. Distributions of relatively constant shape due to noise dominance, such as those according to tau; Doppler, and frequency bin, were compared with less stable distributions such as that of coherence. Data organization requirements of algorithms designed to eliminate noise were also examined. Additional areas of study included the requirements of algorithms to associate data from different types of sensors and the effects on data base distribution of sensor tuning and cueing in response to detected target activity. Implementation of data management software designed according to the findings of this study resulted in an order of magnitude increase in data throughout rates for undersea surveillance software. |
