Accession Number:

ADA063196

Title:

An Investigation of Two Models for the Degree Variances of Global Covariance Functions.

Descriptive Note:

Interim rept.,

Corporate Author:

OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

Personal Author(s):

• Jekeli,Christopher

Report Date:

1978-09-01

Pagination or Media Count:

79.0

Abstract:

Degree variances of the covariance function for gravity anomalies are represented according to the two-component model suggested by Moritz in an attempt to arrive at a low horizontal gradient variance 200 E squared. The parameters of the model are determined through a least squares adjustment to data consisting of GEM 9 anomaly degree variances, as well as empirical point and mean anomaly variances. Results show that this model can accommodate the given point and mean anomaly variances and degree variances, while also yielding the desired low gradient variance. A comparison of this and a similar one-component model investigated by Tscherning and Rapp indicates that the latter cannot produce a low gradient variance together with a satisfactory fit to the data. Also, it does not adapt as well to the observed GEM 9 attenuation of the anomaly degree variances. Author

Descriptors:

• *GRAVITATIONAL FIELDS
• *GRAVITY ANOMALIES
• GLOBAL
• COMPUTATIONS
• HARMONICS
• LEAST SQUARES METHOD
• COVARIANCE
• GEODESY
• POTENTIAL THEORY

Subject Categories:

• Geodesy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE