Get Advances in Geophysics, Supplement 2 Principles and PDF

By Xxx Lee

ISBN-10: 0080568300

ISBN-13: 9780080568300

ISBN-10: 0120188627

ISBN-13: 9780120188628

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Extra info for Advances in Geophysics, Supplement 2 Principles and Applications of Microearthquake Networks

Example text

The field package includes a seismometer, amplifier, voltage-controlled oscillator (VCO), frequency stabilizer, automatic daily calibration system, power supply, and telemetry interface. Output from one field package normally is connected to a nearby telephone line drop and transmitted continuously to Menlo Park. A standard voice-grade tele- 2. Instrumentation Systerns 24 FIELD PACKAGE SEIS. PA0 CENTRAL RECORDING SITE AMPL. LINE COMWTER MULTIPLEXED SEISMIC SIGNAL - DEMULTIPLEXEO SEISMIC SIGNAL ~ RETRANSMIT HELICOROER 4 cm/V TIME CODE IGNALS I SUMMING AMPLIFIER .

12) Expressions similar in form to Eq. 12) were derived by Healy and O’Neill(l977) for the time domain representation of the amplifier step test and the seismometer release test. Starting with the expression for the time domain form of the auiplifier step test, Healy and O’Neill (1977) applied a least-squares method to calculate the locations of the poles a{. Trial values of the aiand fixed values of I and n were determined from calibration of various components of the system-for the step test this is the amplifier, VCO, and the discriminator.

10) ’f. f ( f ) = (27r-I I_, F ( w ) exp(iwt) d w When this integral is evaluated, the residue at t h e j t h pole is found to be bl(al)exp(ialf), where bl(al)means b1 evaluated at w = a ] ,and the factors A ihave been ignored. 12) Expressions similar in form to Eq. 12) were derived by Healy and O’Neill(l977) for the time domain representation of the amplifier step test and the seismometer release test. Starting with the expression for the time domain form of the auiplifier step test, Healy and O’Neill (1977) applied a least-squares method to calculate the locations of the poles a{.

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Advances in Geophysics, Supplement 2 Principles and Applications of Microearthquake Networks by Xxx Lee


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