Accession Number:

ADA230032

Title:

A Functional Description of the Geophysical Data Acquisition System

Descriptive Note:

Rept. for Sep 1986-Jun 1990

Corporate Author:

WESTON OBSERVATORY MA

Personal Author(s):

• Blaney, Joseph I.

Report Date:

1990-08-10

Pagination or Media Count:

80.0

Abstract:

The Geophysical Data Acquisition System, GDAS, is a modified and updated version of the Standalone Data Acquisition, SDAS, Von Glahn, 1980. This report parallels Von Glahns taking freely from it and maintaining its format while emphasizing the changes, modifications, and updates during the decade. Functional descriptions of the subsystem are expanded where needed and full descriptions of the peripheral interfaces including figures depicting jumper configuration for operation within the GDAS, have been added. The purpose of the GDAS has remained the same, that is, a portable computer controlled data acquisition system, with new emphasis on portability and environmental operational. Modifications to the frontend analog section, which underwent a total change, include the flexibility of a remote preamplifier system, and a current mode calibration system. The use of various geophysical sensors was also considered in this redesign. The software section of this report presents a brief description of the Computer Aided Design and calibration programs. Keywords Seismic data Seismic instrumentation Seismometerstransducers Junction boxesinterfaces.

Descriptors:

• *COMPUTER PROGRAMS
• PREAMPLIFIERS
• COMPUTER AIDED DESIGN
• INTERFACES
• SEISMIC DATA
• JUNCTION BOXES
• TRANSDUCERS
• CALIBRATION
• GEOPHYSICS
• ANALOG SYSTEMS
• REMOTE SYSTEMS
• SEISMOMETERS
• DETECTORS
• DATA ACQUISITION

Subject Categories:

• Computer Systems
• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE