Accession Number:

ADA048252

Title:

Study to Develop Gradiometer Techniques.

Descriptive Note:

Final rept. Jul 75-Jun 76,

Corporate Author:

STANFORD UNIV CALIF GUIDANCE AND CONTROL LAB

Personal Author(s):

• DeBra,Daniel B.
• Pelka,Eugene J.

Report Date:

1977-06-01

Pagination or Media Count:

335.0

Abstract:

The primary goal of the gravity gradiometer research effort at Stanford University has been to establish the feasibility of operation of a gravity gradiometer in a closed loop mode. A parameter estimation technique will allow for on-line modification compensation of the sensor output signal, as well as for trimming of pertinent sensor physical properties so as to improve instrument performance. Gravity gradiometers are required to operate with an accuracy of 1 EU Eotvos unit. This is so demanding that closed loop mode operation may be essential. Although attention has been focussed exclusively upon the Hughes rotating gravity gradiometer RGG, the parameter estimation method developed is applicable, in principle, to any instrument subject to dynamically induced errors. Author

Descriptors:

• *GRAVITATIONAL FIELDS
• *GRADIOMETERS
• SIGNAL PROCESSING
• OUTPUT
• SPATIAL DISTRIBUTION
• APPROXIMATION(MATHEMATICS)
• ERROR ANALYSIS
• MEASURING INSTRUMENTS
• INSTRUMENTATION
• FILTERS
• EQUATIONS
• ONLINE SYSTEMS
• CORRELATION TECHNIQUES
• CLOSED LOOP SYSTEMS
• ACHIEVEMENT TESTS

Subject Categories:

• Geodesy
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE