Accession Number : AD0717966

Title :   Interface Between Sea Bottom Instruments for Satellites.

Descriptive Note : Final rept.,

Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA INST OF GEOPHYSICS AND PLANETARY PHYSICS

Personal Author(s) : Titus,Harold A.

Report Date : 10 JAN 1971

Pagination or Media Count : 21

Abstract : It is desired to determine the location of an emission from multiple observations at long range. Each observation (an angle) will have attached to it, an associated variance. The possibility of apriori information as to location of the emission will be included. A Cartesian coordinate system will be utilized to delineate the estimate of the location of the emission. If no apriori information is known regarding the location of the emission, then the observation set is scanned to find the most reliable and accurate fixes. These are used to obtain a first pseudo apriori location of the emission, and its associated apriori variance. With an initial estimate of the location of the emission, extended Kalman filtering techniques can be utilized. These incorporate the use of perturbations from a nominal estimate in terms of the observation equation. Most processes or events of interest occur randomly in time. Examples of this phenomena are tidal wave (Tsunamis), earthquakes, and underground nuclear tests. Such detectors have some general attributes in common. These include background noise rejection, spurious data (glitches) rejection, signal band enhancement, and squaring or rectifying and integrating over a finite time and comparing with preset thresholds for detection. In addition, these devices should require a minimum of power and size and cost. As an example of such a system, a Tsunami detector is developed in detail. (Author)

Descriptors :   (*OCEAN WAVES, DETECTION), (*DIRECTION FINDING, INFORMATION THEORY), DETECTORS, INTERFACES, NOISE, TIDES, STOCHASTIC PROCESSES, BUOYS, OCEAN BOTTOM, MATHEMATICAL ANALYSIS, SIMULATION, DETECTORS

Subject Categories : Physical and Dynamic Oceanography
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE