Earth Sciences: Geodesy - Storming Media

MX Siting Investigation Gravity Survey - Ralston Valley, Nevada

20 AUG 1981

Authors: ERTEC WESTERN INC LONG BEACH CA

The full text of this report is not available and therefore is not for sale. This information is provided for reference purposes only.

Gravity data from Ralston Valley, Nevada, were studied for the purpose of making a geological interpretation which includes estimates of the overall shape of the structural basin, the thickness of alluvial fill, and the location of concealed faults. These estimates are expected to be useful in support of fault studies, in modeling dynamic ground motion in response to nuclear detonations, and in evaluating groundwater regimes. (Author)

Fast, Accurate Two-Person Beach Surveys

AUG 1981

Authors: William A. Birkemeier; COASTAL ENGINEERING RESEARCH CENTER FORT BELVOIR VA

Generally, the most accurate beach survey data are obtained using a surveying level to determine elevation and a tape to measure distance; however, this procedure requires a minimum of three people. Commonly used two-person surveying procedures are stadia surveying and the Emery method. In stadia surveying, a level is used to determine elevation; distance is indirectly determined by two additional readings of the level rod. This method gives the same ...

MX Siting Investigation Gravity Survey - Pahroc Valley, Nevada

20 JUL 1981

Authors: ERTEC WESTERN INC LONG BEACH CA

Gravity data indicate that Pahroc Valley is an equidimensional alluvial basin which is approximately 1400 feet (427 m) deep at its northwestern end. The alluvium overlies a down-to-the-west tilted fault block and there is a broad, shallow pediment across the southern end of the valley. The calculated bedrock depths are necessarily approximate because the complex and imperfectly known density distribution has been represented by a simple two-density model. Also, the ...

The Weapons Support System User's Guide

01 JUL 81

Authors: A. R. LeSchack; M. R. Tang; ANALYTIC SCIENCES CORP READING MA

The Weapons Support System (WSS) was created as a research and development tool in the areas of gravity data elevation, the generation of gravity products, and the study and analysis of geodetic and geophysical (G&G) effects on weapons system. The WSS will facilitate the design, development, and testing of methods, procedures, and algorithms, especially those with that involve a user's online interaction, in real time, with a data base, computational ...

Error Statistics for Astrogeodetic Positions for an RGSS Test Course

JUL 1981

50 pages

Authors: Angel A. Baldini; ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

The full text of this report is available for sale.

In the experimental mobile inertial survey system, geodetic parameters are measured relative to an origin point. Certain errors build up along the survey course. Typically, these errors are adjusted and distributed both during and after completing each mission. During testing, the adjusted derived data are compared with 'known' data that are determined by conventional 'classical' surveys. In its research, ETL requires a more accurate adjustment of errors obtained from conventional ...

Inertial Survey Adjustment,

05 JUN 1981

Authors: Mark S. Todd; Thomas O. Tindall; ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

The paper discusses primarily a least-squares position adjustment for single or multiple (area coverage) inertial traverses. The adjustment technique is developed and presented in detail for a local-level inertial system and summarily generalized for a space-stable inertial system. Application of the method to other inertially derived geodetic values is discussed. (Author)

Pole Position for 1980 Based on Doppler Observations of the GEOS-3 Satellite

JUN 1981

Authors: R. J. Anderle; NAVAL SURFACE WEAPONS CENTER DAHLGREN VA

The position of the earth's spin axis with respect to the crust (polar motion), was computed for the last three months of 1980 by the Defense Mapping Agency Aerospace Center on the basis of Doppler observations of the GEOS-3 satellite. The results were obtained as a contribution to project MERIT, an international compaign to determine the best technique to replace classical astronomical procedures used to determine polar motion since 1900. ...

Low Altitude Simulation/Prediction Techniques

JUN 1981

Authors: Susan A. Knobel; Anthony J. Stenger; Warren R. Stone; TECHNOLOGY SERVICE CORP SANTA MONICA CA

Preparation of sensor predictions at the present time is a manual process requiring several hours of effort by highly trained personnel. This extremely slow response capability is unacceptable within the framework of most Air Force missions, particularly those of a tactical nature. The problem is accentuated in low-altitude missions where the effective sensor resolution places a greater burden on the existing sensor image prediction system and the supporting data bases. ...

Simulation Studies on the Computation of the Gravity Vector in Space from Surface Data Considering the Topography of the Earth

JUN 1981

Authors: Kostas E. Katsambalos; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE AND SURVEYING

Three approaches are investigated for the computation of the components of the gravity vector in space considering th topography of the earth: a numerical integration approach based on the application of Green's third identity, the Discrete Dirac approach, and the Least-Squares Collocation approach. Under a spherical approximation, the surface of the earth is assumed to be known through the elevations of its points above a reference sphere. The first technique ...

Evaluation of Geodetic Products Produced by the NSWC Reduction of SEASAT Radar Altimeter Data

JUN 1981

Authors: Samuel L. Smith III; Thomas I. Hicks; NAVAL SURFACE WEAPONS CENTER DAHLGREN VA

An estimation is made of the possible errors associated with the processing by NSWC of raw SEASAT altimetry data to produce ocean geodetic data, e.g. geoid heights and vertical deflections. Also the noise level of the SEASAT radar altimetry is estimated. Then the SEASAT geodetic data are examined for self-consistency on repeat-track sequences and compared with other independent geodetic data obtained from ocean gravity surveys by ships. Anomalies in the ...

MX Siting Investigation, Gravity Survey - Spring Valley, Nevada

20 MAY 1981

Authors: ERTEC WESTERN INC LONG BEACH CA

Gravity data indicate that the northern part of the Spring Valley study area is occupied by a subsided fault block. The block tilts downward toward the Snake Range on the east. This feature is probably the southern end of a major basin. The southern part of the study area is shallow, with a maximum depth to bedrock of about 1000 feet. The calculated bedrock depths are necessarily approxiamte because the ...

High Precision Tidal Gravity

15 MAY 1981

Authors: T. F. Baker; R. J. Edge; G. Jeffries; INSTITUTE OF OCEANOGRAPHIC SCIENCES BIRKENHEAD (ENGLAND)

The progress made on the conversion to electrostatic feedback of the LaCoste tidal gravimeters ET10, ET13 and ET15 is reported. Tests on the absolute calibration of the gravimeters and the calibration/non linearity of the feedback system are described. A system has been designed and constructed for the continuous and reliable recording of high resolution tidal gravity data over a wide range. Some tests on this system are described. (Author) ...

MX Siting Investigation Gravity Survey - Wah Wah Valley, Utah

15 MAY 1981

Authors: ERTEC WESTERN INC LONG BEACH CA

MX Siting Investigation Gravity Survey - Pine Valley, Utah. Revision

15 MAY 1981

Authors: ERTEC WESTERN INC LONG BEACH CA

An Extended Algorithm for the Ocean Tide Term in the Force Model of the Computer Programs CELEST and TERRA

MAY 1981

Authors: Walter J. Groeger; NAVAL SURFACE WEAPONS CENTER DAHLGREN VA

A revised and extended version if presented of a computer algorithm specifying the gravitational action by which the ocean tides perturb satellite motion. The current ocean tide term in the CELEST and TERRA equations of motion is based entirely on the semidiurnal (M2) tide mode. Also, the corresponding solid earth tide term neglects ocean loading. The present algorithm for the perturbing acceleration caused by the ocean tide re-formulates the M2 ...

Computer-Assisted Photo Interpretation Research at USAETL

21 APR 1981

14 pages

Authors: George E. Lukes; ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

A program in computer-assisted photo interpretation research (CAPIR) has been initiated at the U.S. Army Engineer Topographic Laboratories. In a new laboratory, a photo interpreter (PI) analyzing high-resolution, aerial photography interfaces directly to a digital computer and geographic information system (GIS). A modified analytical plotter enables the PI to transmit encoded three-dimensional spatial data from the stereomodel to the computer. Computer- generated graphics are displayed in the stereomodel for direct ...

The Use of Finite Elements in Physical Geodesy

APR 1981

Authors: Peter Meissl; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

Currently used methods of computational physical geodesy are compared with respect to their efficiency during production runs on a computer. These methods include: (1) Least Squares adjustment with respect to spherical harmonics; (2) Surface layers, buried masses and related methods; (3) Least squares collocation; (4) Representation of the potential by spline functions; and (5) Explicit integral formulas. As an alternative, the feasibility of applying the finite element method to the ...

Geokinetic Environment Investigations

31 MAR 1981

Authors: Eugene B. Hartnett; Eric D. Carleen; Joseph I. Blaney; WESTON OBSERVATORY MA

This report covers the development and implementation of special concepts, techniques and instrumentation for the collection, analysis and application of geokinetic data. The Geokinetic Data Acquisition System (GDAS) was modified, maintained and operationally deployed to various sites designated by AFGL. Tests were conducted at the Defense Nuclear Agency (DNA) CASINO facility in Maryland; Central Inertial Guidance Test Facility (CIGTF), Holloman AFB, N.M.; Space Transportation System (STS) Launch Complex, Vandenberg AFB, ...

Feasibility Studies for the Prediction of the Gravity Disturbance Vector in High Altitudes

MAR 1981

Authors: Hans Suenkel; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

The accuracy of the gravity disturbance vector in high altitude (30, 000 - 200,000 feet), predicted from a surface-covering set of mean gravity anomalies, is estimated. Two methods are used and found to provide estimates which differ by less than 10%, the least-squares collocation and the integral solution. For the integral solution, the estimation of the representation error has been performed in the frequency domain. For the collocation solution an ...

Numerical Methods for Harmonic Analysis on the Sphere

MAR 1981

Authors: Oscar L. Colombo; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

This report presents some numerical methods for estimating spherical harmonic coefficients from data sampled on the sphere. The data may be given in the form of area means or of point values, and it may be free from errors or affected by measurement 'noise'. The case discussed to greatest length is that of complete, global data sets on regular grids (i.e., lines of latitude and longitude, the latter, at least, ...

Determining Geophysical Phenomena. A Geophysical Analysis of Satellite Laser Data.

Mar-1981

Authors: E M Gaposchkin; SMITHSONIAN ASTROPHYSICAL OBSERVATORY CAMBRIDGE MA RADIO AND GEOASTRONOMY D

Precision laser tracking data on three close-earth satellites (Geos 1, Geos 2, and Lageos) are analyzed to obtain measurements of ocean tides, body tides, (including the core-mantle resonance) and other mass displacements, from perturbations of the node and inclination. Mean elements are computed for 6.0 years for Geos 1, 4.9 years for Geos 2, and 2.1 years for Lageos. Ocean tides T2, S2, K2, P1, K1, and phi 1 are ...

Rapid Geodetic Survey System (RGSS) White Sands Tests for Position, Height and the Anomalous Gravity Vector Components

27 FEB 1981

Authors: Mark S. Todd; ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

The following paper presents test results with the Rapid Geodetic Survey System (RGSS) used at White Sands Missile Range (WSMR), NM in 1980. Numerous traverses were surveyed with the inertial system carried in a truck and in a helicopter. The performance of the system in interpolating position, height, and the anomalous gravity vector components is statistically characterized. (Author)

Internal and Surface Wave Production in a Stratified Fluid

02 FEB 1981

Authors: Joseph B. Keller; Dorothy M. Levy; Daljit S. Ahluwalia; STANFORD UNIV CA

Military Geodesy and Geospace Science Unit One

FEB 1981

Authors: Warren G. Heller; A. Richard LeSchack; ANALYTIC SCIENCES CORP READING MA

Unit One introduces the student to Mapping, Charting, and Geodesy. Basic concepts and principles are presented that will be applied during the remainder of the course. The subjects to be covered include: Earth modeling; Coordinate systems; and Techniques of mapping, charting, and geodesy. All of these areas are part of the science of geodesy, which is defined by the three principal subjects with which it is concerned: The size and ...

Military Geodesy and Geospace Science Faculty Material

FEB 1981

Authors: Warren G. Heller; A. Richard LeSchack; ANALYTIC SCIENCES CORP READING MA

This document provides a lecture course outline for a full-year introduction to military geodesy and geospace science. Throughout the presentation a military perspective is maintained which links mapping, charting, and geodesy (MC&G) issues with modern defense requirements. Elementary preparation is assumed in the subjects of general physics, mechanics, chemistry, astronautics, and linear system theory. The student should also be familiar with differential equations, analytic geometry, and linear algebra. Some acquaintance ...

Military Geodesy and Geospace Science. Unit Two

FEB 1981

Authors: Warren G. Heller; A. Richard LeSchack; ANALYTIC SCIENCES CORP READING MA

The general terrestrial mapping, charting, and geodesy (MC&G) problem can best be formulated as the problem of generating a metric description of the earth and its physical properties -- a description in which relative positions within and on the surface of the earth are accurately described, the figure of the earth is accurately portrayed, and the gravitational, magnetic, and spin properties of the earth are fully represented in quantitative terms. ...

Military Geodesy and Geospace Science. Unit Three

FEB 1981

Authors: Warren G. Heller; A. Richard LeSchack; ANALYTIC SCIENCES CORP READING MA

This lecture course provides a full-year introduction to Military Geodesy and Geospace Science. Throughout the presentation a military perspective is maintained which links Mapping, Charting, and Geodesy (MC&G) issues with modern defense requirements. Elementary preparation is assumed in the subjects of general physics, mechanics, chemistry, astronautics, and linear system theory. The student should also be familiar with differential equations, analytic geometry, and linear algebra. Some acquaintance with vector calculus is ...

Military Geodesy and Geospace Science Unit Four

FEB 1981

Authors: Warren G. Heller; A. Richard LeSchack; ANALYTIC SCIENCES CORP READING MA

SCATHA-Analysis System

31 JAN 1981

Authors: Dennis E. Delorey; BOSTON COLL CHESTNUT HILL MA SPACE DATA ANALYSIS LAB

A data analysis system has been designed, developed and implemented for the SCATHA satellite. Data bases have been developed for the Air Force Geophysics Laboratory SC5 particle detectors and SC4 beams systems. The SCATHA preliminary data atlas has been completed. System methods and analysis techniques applied to probe data and the preliminary atlas are described. Data base formats are included. (Author)

Applications of the DoD World Geodetic System - 1972 to Charting by the Use of a Semi-Automated System

26 JAN 1981

Authors: Donald Wirak; DEFENSE MAPPING AGENCY HYDROGRAPHIC/ TOPOGRAPHIC CENTER WASHINGTON DC

DMA has a semi-automated system that is used to evaluate the horizontal datum of maps and charts for geodetic accuracy. Geodetic control descriptions in the DMAHTC library of holdings are used to make this evaluation. The computer system gives geodetic shifts to source maps, surveys, and charts. The chart is compiled from a panel base with the WGS-72 shifts applied. The final color proof of the chart is evaluated and ...

MX Siting Investigation. Gravity Survey - Sevier Desert Valley, Utah

24 JAN 1981

Authors: FUGRO NATIONAL INC LONG BEACH CA

Results of the gravity survey in the Sevier Desert Valley of West Central Utah shows that it is probable that the alluvium in the central part of the study area overlies or is interbedded with a thick sequence of dense bosalts and that the basalts is about around the edges of the Sevier Desert where the alluvium is interpreted to be several thousand feet thick. The basalts in the central ...

Directions of Applications of Coherent Light Optics and Holography in Geodesy and Cartography,

09 JAN 1981

Authors: Henryk Z. Kowalski; Adam Dubik; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

New Survey Challenges in Support of the DMA Mission,

JAN 1981

Authors: Larry D. Beers; DEFENSE MAPPING AGENCY HYDROGRAPHIC/ TOPOGRAPHIC CENTER WASHINGTON DC

This paper discusses the major geodetic and geophysical surveys that the Geodetic Survey Squadron is engaged into support DOD programs and particularly the technological improvements that must be made in survey methodology if the ever-increasing requirements of the military weapon systems of the mid- to late 1980s are to be met. Gravity, deflection of the vertical, inertial, astronomic and distance measuring equipment and techniques are all presented in the paper. ...

Decreasing the Influence of Distant Zones with Modifications to the Stokes and Vening Meinesz Kernels,

JAN 1981

Authors: Patrick Fell; Maksiminas Karaska; NAVAL SURFACE WEAPONS CENTER DAHLGREN VA

The expected influence of distant zones on the computations of geoid undulation and vertical deflection is dramatically reduced with the application of a minimization procedure proposed by Molodenskii. Assuming that the lower degree harmonics of the gravity anomaly field are known, results are obtained for the Stokes and Vening Meinesz integrals. The results indicate that the expected truncation error based on these optimized kernel functions is negligible for typical applications ...

Some Automated Cartography Developments at the Defense Mapping Agency

1981

Authors: Clifford A. Kottman; DEFENSE MAPPING AGENCY HYDROGRAPHIC/ TOPOGRAPHIC CENTER WASHINGTON DC

The first steps toward an automated cartographic capability at DMA were taken to relieve the burden of manual scribing and drafting. Thus, the focus was on the automatic plotting of grids and projections, and later, on the digitization and tagging of line work, its digital manipulation, and its automatic plotting or scribing in a symbolized format. The present capability includes many photogrammetric, graphic, and hybrid techniques to capture cartographic and ...

Control Theory and Singular Riemannian Geometry

1981

Authors: R. W. Brockett; HARVARD UNIV CAMBRIDGE MA DIV OF APPLIED SCIENCES

Theories of Notation and Polar Motion I,

Dec-1980

Authors: Helmut Moritz; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

The present report attempts a systematic presentation and review of modern theories of the earth's rotation (precession, nutation, and polar motion) for a rigid earth, a purely elastic earth, and the Poincare model consisting of a rigid mantle and a liquid core. Emphasis is on the treatment of an elastic earth on the basis of Liouville's equation and on the consideration of the earth's rotation as an eigenvalue problem. (Author) ...

Executive Summary Report - FY80 Geotechnical Siting Investigations

30 NOV 1980

Authors: FUGRO NATIONAL INC LONG BEACH CA

This report contains a summary discussions of geotechnical programs that were conducted in Fiscal Year 1980 (FY 80) for U.S. Air Force's (USAF's) Missile X (MX) advanced ICBM program. The purpose of the geotechnical studies is to provide technical information to support MX siting decisions and requirements and to provide data needed by other associate MX contractors and government agencies. This effort, called Verification studies, is primarily for the purpose ...

Accurate Coordinates and Predicted Position of Navigation Satellites NNSS,

28 NOV 1980

Authors: Wladyslaw Goral; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

MX Siting Investigation. Gravity Survey - Big Smokey Valley, Nevada

28 NOV 1980

Authors: FUGRO NATIONAL INC LONG BEACH CA

The interpretation of Big Smoky Valley gravity data indicates that there are major range-bounding normal fault systems extending the full length of the valley on both sides. The maximum depth calculated in the valley is 4000 feet (1219 m). The calculated bedrock depths are only approximations because little is known about the actual density distribution in and around the valley and the residual gravity anomaly is necessarily based on an ...

Analysis of Lunar Laser Ranging Data and Performance and Analysis of VLBI Observations for Geodetic Purposes.

27 NOV 1980

Authors: C. C. Counselman III; T. A. Herring; R. B. Langley; I. I. Shapiro; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH AND PLANETARY SCIENCES

UT0 and variation of latitude have been determined from the McDonald Observatory lunar laser ranging (LLR) observations for the period October 1970 to October 1979. We have compared our estimates with those determined from the UT1 and pole position values obtained using other techniques. In 1978, the distance between the Haystack Observatory in the United States and the Onsala Space Observatory in Sweden was determined by very long baseline interferometry ...

Absolute Gravity Measurements in the United States of America.

12-Nov-1980

Authors: Iginio Marson; Franco Alasia; ISTITUTO DI METROLOGIA GUSTAVO COLONNETTI TURIN (ITALY)

The measurements of gravity acceleration described in the report were performed in 1980. The introductory part of the report illustrates the transportable absolute gravimeter and ancillary instrumentation used in measurements, and describes the measurement method applied; uncertainty and errors are analysed as well. Measurements of gravity acceleration made in Europe prior to the USA program are also briefly considered before a detailed account is given of the measurements made in ...

Design of a Unique Azimuth Monitoring Device.

10 NOV 1980

Authors: T. E. Wirtanen; B. M. Mertz; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

As missile CEP's get progressively smaller, there is an increasingly urgent requirement to monitor all of the geokinetic effects acting upon the missile launch site, the missile alignment systems, and missile weapons system accuracy. It is therefore necessary to devise a means to monitor the translational rotational changes of the crustal environment around a missile launch area. This must be done to determine the direction, magnitude, frequency, and elasticity of ...

Report on Research at AFGL July 1976 - December 1978

NOV 1980

Authors: John F. Dempsey; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

This report continues a series of eight reports on Research at the Air Force Geophysics Laboratory. This report covers a two-and-one-half-year interval. It was written primarily for Air Force and DOD managers of research and development and more particularly for officials in Headquarters Air Force Systems Command, for the Director of Laboratories (DL), and for the Commanders of and the Laboratories within DL. It is intended that the report will ...

The New Gravity System: Changes in International Gravity Base Values and Anomaly Values.

OCT 1980

Authors: George P. Woollard; Valerie M. Godley; HAWAII INST OF GEOPHYSICS HONOLULU

The effect of adopting the Geodetic Reference System 1967 (GRS 67) theoretical gravity formula and the International Gravity Standardization Net 1971 (IGSN 71) on gravity anomaly values is assessed. The gravity standard represented in the IGSN 71 values is shown to not conform to that of modern absolute gravity values as well as one might expect although, overall, the apparent discrepancy does not appear to be greater than about 0.03 ...

Perform a Gravity Correlation Study.

OCT 1980

Authors: Micheline C. Roufosse; SMITHSONIAN ASTROPHYSICAL OBSERVATORY CAMBRIDGE MASS

The aim of this work is to study the mechanical properties and time evolution of the lithosphere. For that purpose, geoid heights derived from the Geos 3 and Seasat radar altimeters were used. The study of the correlation existing between bathymetry and free-air anomalies or geoid heights gives information on the mechanical properties of the lithosphere and its thickness. The lithospheric thickness is related to the age of the lithospheric ...

The Relationship Between Marine Gravity and Bathymetry.

02 SEP 1980

Authors: Sean C. Solomon; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH AND PLANETARY SCIENCES

The theoretical basis is outlined for a quantitative relationship between two-dimensional bathymetry and free air gravity in stable ocean basins. The relationship, designed for use as an algorithm to predict gravity in areas where only bathymetry is known, is based on flexure theory for thin elastic plates and on the expected evolution with seafloor age of the isostatic response of oceanic lithosphere. The relationship is tested against bathymetric and gravity ...

Application of NAVSTAR GPS Geodetic Receiver to Geodesy and Geophysics.

SEP 1980

Authors: Richard J. Anderle; NAVAL SURFACE WEAPONS CENTER DAHLGREN VA

A prototype geodetic receiver is being developed for application with the NAVSTAR Global Positioning System. Data obtained with an experimental version of the receiver applied to simulations of performance of the prototype version indicate that the relative positions of stations 10 to 100 km apart can be obtained with 1- to 2-cm accuracy after 6 hr of observations provided that water-vapor radiometers are used to obtain tropospheric refraction correction data. ...

Microgravimetric Techniques for Geotechnical Applications.

SEP 1980

Authors: Dwain K. Butler; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB

Application of high-resolution gravimetry to geotechnical problems is properly termed microgravimetry and is a relatively recent addition to the list of geophysical methods available for geophysical site investigations and other geotechnical applications. This report investigates the applicability of microgravimetry to the wide range of geotechnical problems of interest to the Corps of Engineers. Microgravimetry should be viewed as a complement to other geophysical methods for site investigations. For sites with ...

Determination of Land Elevation Changes Using Tidal Data.

SEP 1980

Authors: Francisco A. T. V. Abreu; NAVAL POSTGRADUATE SCHOOL MONTEREY CA

The purpose of this thesis is to study the temporal pattern of vertical land movements at selected Pacific Coast tide stations. The relative motion of the land at these stations is indicated by the relationship between monthly mean sea levels measured at pairs of stations. Examination of historical monthly mean sea level data by means of graphical and spectral analysis led to the use of an anomaly filter which adjusts ...