EVALUATION OF B AND D SUMMATION TRACES AT THE TONTO FOREST SEISMOLOGICAL OBSERVATORY.
Special rept. no. 13,
UNITED ELECTRODYNAMICS INC PASADENA CALIF
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This is an interim report on a project to compare quality of signal reception on Summations B, B sub 1, and B sub 2 with quality of signal reception on Summations D, D sub 1 and D sub 2 respectively. Data from a recording period of two full months were analyzed. These results are summarized as follows a Summations B and B sub 1 appear to be nearly identical in quality of signal reception to Summations D and D sub 1 at the gains used. b Summation D sub 2 has a more prominent high frequency background than Summation B sub 2. This reduces its reception quality very slightly on low level events. c The increase in high frequency background due to increased gains on Sums B sub 1 and D sub 1, and particularly on Sums B sub 2 and D sub 2 decreases the probability of ip starts. This is to be expected from past analytic experience. Author