Accession Number:

ADA172481

Title:

Topics in Geodetic Algorithm Research.

Descriptive Note:

Final rept. Jan-Dec 85,

Corporate Author:

ANALYTIC SCIENCES CORP READING MA

Personal Author(s):

• Comer,Robert P.
• LeSchack,A. R.
• Marks,Karen M.
• Tait,Kevin S.

Report Date:

1986-08-15

Pagination or Media Count:

179.0

Abstract:

The concept of geodetic algorithm is defined in the context of estimating and computing gravity field quantities of interest from available measured data. Examples of major categories of geodetic algorithms are given. These include classical integral evaluation methods, least-squares collocation, the contractors GEOFAST technique, and Fourier transform methods. Also summarized and reviewed are algorithms and techniques considered in investigations by an International Association of Geodesy IAG Special Study Group. Detailed results are presented for numerical experiments with the GEOFAST algorithm applied to synthetic data, demonstrating the high accuracy and computational efficiency of this method. Various aspects of the treatment of terrain effects are considered, including relevant efforts and results of the IAG Special Study Group as well as new theoretical and experimental contributions by the contractor. Keywords Geodesy, Gravity anomaly, Deflection of the vertical, Collocation, Terrain reduction, and GEOFAST algorithm.

Descriptors:

• *ALGORITHMS
• *GEODESY
• FOURIER TRANSFORMATION
• METHODOLOGY
• COMPUTATIONS
• HIGH RATE
• QUANTITY
• DEFLECTION
• ACCURACY
• EFFICIENCY
• TERRAIN
• REDUCTION
• FAST FOURIER TRANSFORMS
• INTERNATIONAL
• NUMERICAL METHODS AND PROCEDURES
• GRAVITATIONAL FIELDS
• GRAVITY ANOMALIES

Subject Categories:

• Geodesy
• Theoretical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE