Aerial Astrogeodetic - Gradiometric Vertical Deflection Determination,
Abstract
The paper addresses vertical deflection estimation methods developed by Jordan and by White and Goldstein, presents the development of two independent linear least squares estimation methods with one having optimal characteristics as to accuracy, economy, and versatility, and arrives at significant conclusions. Jordan's analyses are basic as to error estimation of gravity vector components exclusively from measurements of gravity gradients under consideration of important parameters. Error estimates become greater with a decreasing quadratic survey area. White and Goldstein attempt to use weakly and strongly averaged aggregates of all gradiometer measurements, covering the whole survey area, for the estimation of point vector components, starting with the consideration of Tzz measurement. A developed two-stage estimation of gravity vector component differences, to be augmented by a highly accurate gravity vector in the center of the survey area, is most promising from the standpoint of accuracy, economy, and versatility. Four additional gravity vector components at the corners of the quadratic survey area would alleviate the problem of accuracy deterioration close to the survey area boundary.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1984
- Accession Number
- ADA166790
Entities
People
- H. Baussus Von Luetzow
Organizations
- Geospatial Research Laboratory