Accession Number:

ADA230833

Title:

Gravity Gradiometer Survey System (GGSS) Post-Mission Data Processing Numerical Results

Descriptive Note:

Final rept. Jun 1986-Jun 1989

Corporate Author:

APPLIED SCIENCE ANALYTICS INC CANOGA PARK CA

Personal Author(s):

• Bose, Sam C.
• Thobe, Glenn E.

Report Date:

1989-08-01

Pagination or Media Count:

160.0

Abstract:

Software implementation and numerical results of a Karhunen-Loeve estimator of local surface gravity fields from measurements of airborne gravity gradient fields are presented. The software was validated using simulated synthetic data from a single dipole gravitational field. Numerical experiments were performed on simulated measurements based on multiple layers of random dipoles, selected in such a way as to produce gravity fields which are statistically similar to those observed in a certain region of Texas. Error analyses were based on qualitative comparison of the plots and on quantitative comparison of indicators computed from the minima and maxima of plotted gravity vector fields. Results indicate that the method is a viable estimation technique suitable for small computers. Several technical advances were made including 1 an arrangement of equations which minimizes computer storage of arrays and permits field measurements to be made sequentially 2 the application of fast sine and cosine transforms to speed computation dramatically.

Descriptors:

• *GRADIOMETERS
• *NUMERICAL ANALYSIS
• *GRAVIMETERS
• *DATA PROCESSING
• COMPUTERS
• LAYERS
• COMPARISON
• AIRBORNE
• ARRAYS
• REGIONS
• ESTIMATES
• SURFACES
• SURVEYS
• ERROR ANALYSIS
• VIABILITY
• DIPOLES
• VECTOR ANALYSIS
• NUMERICAL METHODS AND PROCEDURES
• STORAGE
• EQUATIONS
• INDICATORS
• PLOTTING
• TEXAS
• GRADIENTS
• SINE WAVES
• GRAVITATIONAL FIELDS
• COMPUTATIONS
• MEASUREMENT
• SIMULATION
• VELOCITY
• COMPUTER PROGRAMS

Subject Categories:

• Geodesy
• Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE