| Earth Observing System: Information on NASA's Incorporation of Existing Data Into EOSDIS |
25 SEP 92 |
13 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC INFORMATION MANAGEMENT AND TECHNOLOGY DIV
|
 | NASA plans to include a variety of data in the early EOSDIS, including reprocessed versions of certain key large-volume data sets that have been collected over many years. However, few of the data sets earmarked for reprocessing will be sufficiently reworked to be available for users to test early EOSDIS capabilities and provide feedback. Although EOSDIS Version 0 is scheduled to become operational in 1994, none of the six large ... |
|
| Differential Cartography |
13 JUL 92 |
|
| Authors:
J. D. Zund; NEW MEXICO STATE UNIV LAS CRUCES DEPT OF MATHEMATICAL SCIENCES
|
 | The various properties of conformal projections of a sphere and a surface of revolution are derived by using the notions of differential cartography. It is shown that familiar properties of the Mercator projection may be carried over from a sphere to an arbitrary surface of revolution. |
|
| IERS Standards for 1992 |
JUL 92 |
|
| Authors:
Dennis D. McCarthy; OBSERVATOIRE DE PARIS (FRANCE)
|
| This series of publications gives technical information related to the IERS activities, e.g. reference frames, excitation of the Earth rotation, computational or analysis aspects, models, etc. It also contains the description and results of the analyses performed by the IERS Analysis Centres for the Annual Report global analyses. |
|
| Coordinates in Differential Geodesy |
22 JUN 92 |
15 pages |
| Authors:
J. D. Zund; NEW MEXICO STATE UNIV LAS CRUCES DEPT OF MATHEMATICAL SCIENCES
|
| This is a written version of an abstract of the same title which was presented at the 20th General Assembly of the International Association of Geodesy (Vienna, August 1991). It addresses the various roles of coordinates in theoretical geodesy: determinative coordinates in classical geodesy, descriptive coordinates in the Marussi-Hotine formulation of differential geodesy, and our new notion of permissible coordinates in a reformulation of the Marussi-Hotine theory. |
|
| Mapping, Charting, and Geodesy Division Abstracts of Publications, Presentations and Transitions: 1991 |
MAY 92 |
|
| Authors:
Michael M. Harris; Janice M. Garner; NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
|
| This document presents abstracts of the 1991 publications and presentations of the Mapping, Charting, and Geodesy Division, Naval Oceanographic and Atmospheric Research Laboratory, Stennis Space Center, MS. requirements, mapping, hydrography, optical properties, remote sensing, reverberation, bathymetry, arc digitized raster graphic, world vector shoreline. |
|
| Mapping, Charting and Geodesy Requirements for Military Contingency Operations |
10 APR 92 |
|
| Authors:
Susan A. Riley; ARMY WAR COLL CARLISLE BARRACKS PA
|
| The rapid development and application of digital technology is creating new methodologies in the field of cartography. The Defense Mapping Agency (DMA), which primarily serves the branches of the Department of Defense, is modernizing nearly all aspects of its operation in response to the technology-driven changes in military communications and weaponry. This paper will describe and analyze the planning and procedural changes now being implemented, and the systems that will ... |
|
| Radioactively Labelled Macromolecules. |
02 APR 1992 |
|
| Authors:
Richard B. Thompson; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A method for making a radioactively labeled macromolecular substance includes the steps of: reacting a first bidentate ligand including at least two heterocyclic nitrogens with a macromolecule to form a modified macromolecule; reacting a radioactive metal ions having one member of the group selected from 97 Ru , 52 Fe, 191 Os and 67CU ions, with a second bidentate ligand including at least two heterocyclic nitrogens and a third bidentate ... |
|
| Mass Balance of Antarctica and Sea Level Change, |
MAR 1992 |
|
| Authors:
C. R. Bentley; M. B. Giovinetto; WISCONSIN UNIV-MADISON GEOPHYSICAL AND POLAR RESEARCH CENTER
|
| The overall mass balance of the Antarctic ice sheet has been estimated by comparison of the best available data on input in the form of snowfall with output in the form of ice flux through gates at or near the margin of the ice sheet. Surface melt is a negligible contributor to mass balance and has been ignored. Bottom melt under large ice shelves remains a major source of uncertainty. ... |
|
| Orbit Perturbations Due to an Axi-Symmetric Gravitational Field, Analyzed Over Extended Periods of Time |
JAN 92 |
|
| Authors:
R. H. Gooding; DEFENCE RESEARCH AGENCY FARNBOROUGH (UNITED KINGDOM) AEROSPACE DIV
|
| The author's untruncated orbital theory for perturbations due to the Earth's zonal harmonics, previously developed to cover all terms associated with (j sub 2)sq and J sub l, is being extended to cover the secular and long- periodic effects associated with (J sub 2)cm and (J sub 2)(J sub l). If J sub 2 and J sub l (l > 2) are regarded as first-order and second-order respectively, this means ... |
|
| Stages and Discharges of the Mississippi River and Tributaries and Other Watersheds in the New Orleans District for 1992 |
92 |
282 pages |
| Authors:
ARMY ENGINEER DISTRICT NEW ORLEANS LA
|
| This pamphlet contains the results of stage and discharge observations made on the Mississippi River, its outlets and tributaries and other streams and waterways in the US Army Engineer District, New Orleans, during the 1992 calendar year. In addition to the records of this district, there are contained wherein gage and discharge data furnished by the US geological Survey, and Gage Records furnished by the National Oceanic and Atmospheric Administration. ... |
|
| Coordinate Systems for Space and Geophysical Applications |
11 DEC 91 |
76 pages |
| Authors:
K. H. Bhavnani; R. P. Vancour; RADEX INC BEDFORD MA
|
| Many coordinate systems used at Phillips Laboratory, Hanscom AFB, for space and geophysical applications are described. This document describes astronomical, orbital, and geomagnetic systems, and special emphasis is given to magnetospheric coordinates in which radiation belt particle investigations may be made. An extensive list of terms and abbreviations is included. These coordinate systems are identified by their origins and the primary and secondary reference axes, which allows them to be ... |
|
| Programming Unique Mapping, Charting, and Geodesy (MC&G) Requirements for Developing Systems |
11 SEP 91 |
5 pages |
| Authors:
ASSISTANT SECRETARY OF DEFENSE (COMMAND CONTROL COMMUNICATIONS AND INTELLIGENC E) WASHINGTON DC
|
| This Instruction establishes policy, assigns responsibilities, and prescribes procedures for the identification and funding of any unique MC and G product required by a system under development or upgrade in accordance with references (a), (b), and (c) |
|
| Department of Defense World Geodetic System 1984: Its Definition and Relationships with Local Geodetic Systems. Second Edition |
01 SEP 1991 |
169 pages |
| Authors:
DEFENSE MAPPING AGENCY WASHINGTON DC
|
| This technical report presents the Department of Defense (DoD) World Geodetic System 1984 (WGS 84) developed as a replacement for WGS 72. The development of WGS 84 was initiated for the purpose of providing the more accurate geodetic and gravitational data required by DoD navigation and weapon systems. The new system represents the Defense Mapping Agency's modeling of the earth from a geometric, geodetic, and gravitational standpoint using data, techniques, ... |
|
| Annotated Bibliography of Relative Sea Level Change |
SEP 91 |
197 pages |
| Authors:
Laurel T. Gorman; COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS
|
| This report summarizes 377 abstracts on the relative change of sea level that have been published through 1989. Articles cited in this bibliography include references to global, regional, and local sea level changes with emphasis on quantitative data analysis. Coastal and geological processes that affect sea level change are discussed in the background section. A cross- referenced keyword index and a subject index are included. |
|
| Evaluation of Absolute Positioning Using the Defense Mapping Agency's (GASP) Program |
SEP 91 |
161 pages |
| Authors:
Dennis Bredthauer; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY
|
| The Geodetic Absolute Sequential Positioning (GASP) program, as utilized by the Defense Mapping Agency (DMA), processes static GPS measurements collected with the TI 4100 GPS receiver to estimate geodetic point (absolute) positions. In this thesis, the GASP program is modified to accept data from different receiver types, the estimated point positions are compared to positions produced by the Transit Doppler positioning system, the between- receiver estimates are compared, the difference ... |
|
| Of Fluid Mechanics and Related Matters: The Proceedings of a Symposium Honoring John Miles |
SEP 91 |
|
| Authors:
Rick Salmon; Don Betts; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA
|
| The following topics were presented: (1) The formation of bubbles in fluidized beds; (2) Forced, damped pendulums; (3) Lagrangian observations of surface circulation in the California Current system; (4) Acoustic mode coupling in shallow water, range-dependent oceans; (5) The response of a strait to winds and tides; (6) Current meters in the core of the Earth; (7) On the damping of Faraday waves; (8) Convection with shear has its limits; ... |
|
| Geodetic Measurement of Tectonic Deformation in Central California |
SEP 1991 |
225 pages |
| Authors:
Kurt L. Feigl; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARYSCIENCES
|
| The object of this thesis is to measure directly the tectonic deformation in the Santa Maria Fold and Thrust Belt (SMFTB), northwest of Santa Barbara California. The principal measurement technique is space geodesy, using the signals transmitted by the satellites of the Global Positioning System (GPS) . Beyond the introduction, the thesis contains three separate sections, concerning an improved model for drifting oscillators in the satellite and receiver, the analysis ... |
|
| Infrared Horizon Detection |
31 JUL 91 |
59 pages |
| Authors:
Monte S. Kaelberer; NAVAL SURFACE WARFARE CENTER SILVER SPRING MD
|
| THe sea/sky interface in the 3 to 5 micron and 8 to 12 micron regions is examined in this report. The efficacy of two algorithms for delineating the optical horizon is studied using infrared data taken with the Infrared Analysis Measurement and Modeling Program (IRAMMP) sensor at Port Hueneme, California, and Marathon Florida. Several signal processing methods are described along with the performance results of computer simulations exercising the various ... |
|
| Spacetime Geodesy |
JUL 91 |
71 pages |
| Authors:
Arkady Kheyfets; WEAPONS LAB (AFSC) KIRTLAND AFB NM
|
| Precise global clock synchronization is an integral part of the Global Positioning System (GPS). GPS satellite clocks are moving with respect to surface station clocks at speeds sufficient to require consideration of special relativistic effects. GPS satellite orbit radii are large enough to be affected by the differences in gravitational potential. Gravitational changes affect clock synchronization on the same order as the special relativistic effects. A consistent treatment of both ... |
|
| Satellite-to-Satellite Tracking in the High-Low Mode: Line-of-Sight Acceleration in a Residual Gravity Field |
JUL 91 |
34 pages |
| Authors:
Georges Blaha; NOVA UNIV OCEANOGRAPHIC CENTER DANIA FL
|
| In this study,the residual line-of-sight acceleration for a general satellite configuration is developed rigorous to within the first -order differentials. In addition to the usual basic term treated in geophysical literature, two kinds of corrective terms are derived: the term c(1) (related to satellite velocities) and the combined term c(2)+c(3)+c(4) (related to satellite positions). Subsequently, the general formulation is specialized for a high-low configuration. The outcome of computer simulations performed ... |
|
| Test of Newtonian Gravity Using DSV Sea Cliff |
JUN 91 |
|
| Authors:
John A. Hildebrand; Mark A. Zumgerge; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
|
| Several recent geophysical measurements have searched for deviations from Newton's inverse square law by testing for range dependence of the gravitational constant G. One group of these experiments observes the vertical gravity gradient above the earth using measurements on tall towers and tests for deviations from Newtonian gravity but provides no direct estimate of G. Another group of geophysical experiments observes gravity from material slabs of known density by measuring ... |
|
| Aera Handbook Series: Nigeria - A Country Study |
JUN 91 |
|
| Authors:
Helen C. Metz; LIBRARY OF CONGRESS WASHINGTON DC FEDERAL RESEARCH DIV
|
|
| Levels of Processing of Speech and Non-Speech |
10 MAY 91 |
|
| Authors:
Arthur G. Samuel; YALE UNIV NEW HAVEN CT DEPT OF PSYCHOLOGY
|
| These studies examined both signal-dependent factors, and listener- dependent factors. The examinations of signal factors include experiments on perceptual degradation due to signal interruption at critical rates (approximately 4cps), and studies mapping the early levels of representation of speech. The data support the existence of two qualitatively different early processing stages; the first is relatively peripheral and subject to neural fatigue, while the second is central and subject to criterion ... |
|
| Origins of GPS Surveying |
26 APR 91 |
|
| Authors:
C. C. Counselman; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| Conceptually, GPS geodetic surveying is a descendant of hyperbolic radio positioning systems such as LORAN and Omega, of the 'very long baseline' interferometry technique of radio astronomy, and of satellite Doppler tracking. Satellite Doppler positioning systems such as TRANSIT may have paved the way for GPS politically and economically, but conceptually they were strongly opposed to and probably retarded the development of GPS geodetic surveying. |
|
| Origins of GPS Surveying. |
26 APR 1991 |
|
| Authors:
C. C. Counselman; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| Conceptually, GPS geodetic surveying is a descendant of hyperbolic radio-positioning systems such as LORAN and Omega, of the very long baseline interferometry technique of radio astronomy, and of satellite Doppler tracking. Satellite Doppler positioning systems such as TRANSIT may have paved the way for GPS politically and economically, but conceptually they were strongly opposed to and probably retarded the development of GPS geodetic surveying. |
|
| On High Frequency Spectral Analysis of Very Noisy Stochastic Processes and its Application to ERP Series Determined by VLBI and SLR |
15 FEB 91 |
24 pages |
| Authors:
Wieslaw Kosek; NAVAL OBSERVATORY WASHINGTON DC
|
| Increased accuracy of measurement techniques in geodesy allows us to investigate weak short periodic variations in Earth Rotation Parameters (ERP). These variations in the ERP of a short periodic nature from 10 to 100 days are of the order of the measurement error or smaller. Therefore, application of an optimum method of spectral analysis is very important. In order to determine the best spectral analysis to find short period oscillations ... |
|
| Crustal Deformation Measurements in the Vicinity of Vandenberg Air Force Base |
31 DEC 90 |
5 pages |
| Authors:
Robert W. King; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES
|
| Recent geological and geodetic studies have suggested that the region surrounding Vandenberg AFB, CA is undergoing active crustal deformation. In 1989 funding under this grant was used to purchase five GPS receivers and to begin a series of measurements designed to determine the magnitude and spatial distribution of deformation in a region encompassing the major faults and folds within 50 km of Vandenberg. Four receivers were acquired in January 1990 ... |
|
| Method for Determining Astronomic Azimuth. |
04 SEP 1990 |
|
| Authors:
Alan G. Evans; William L. Stein; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An improved method for fixing position of a land based target site with respect to a reference site in the natural coordinate frame comprising the steps of determining geodetic azimuth between the target site and the reference target using Global Positioning System (GPS) satellites and relative positioning survey techniques; then calculating a relationship using gravity vertical deflections; and then converting the geodetic azimuth to astronomic azimuth. This method has several ... |
|
| Committee on Geodesy - National Research Council |
31 AUG 90 |
|
| Authors:
Robert S. Long; NATIONAL ACADEMY OF SCIENCES WASHINGTON DC
|
| The focus was on the applications of geodesy to oceanography, geophysics, space science, surveying, mapping and instrumentation. A report Geodesy in the Year 2000 is under review and will be published during the winter 1989-90. The Committee plans to continue to review the activities and research in geodesy; identify basic research opportunities and applied research needs; and recommend actions to meet future national, societal,scientific and technological demands on geodetic science, ... |
|
| Electric Propulsion Study |
AUG 90 |
169 pages |
| Authors:
Dennis J. Cravens; SCIENCE APPLICATIONS INTERNATIONAL CORP TORRANCE CA
|
| This report reviews inductive theories and experimental approaches which provide for interactions between gravitational and electromagnetic fields. The theoretical section develops a general relativistic five dimensional theory to the point that electromagnetic effects can be interpreted. Emphasis is placed on modifications to the classical Maxwell equations and field vector equations. The theories are then often used to propose specific experimental studies which can verify the electromagnetic and gravitational interactions. Specific ... |
|
| Report on Mapping, Charting, and Geodesy Support Requirements to the Acquisition Process |
22 MAY 1990 |
13 pages |
| Authors:
INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
|
| This is the final report on the Audit of Mapping, Charting, and Geodesy Support Requirements to the Acquisition Process. The audit, requested by the former Director, Defense Mapping Agency, was made from August to December 1989. The objective was to determine whether DoD weapon system development and acquisition program offices (hereafter called program offices) were identifying and providing mapping, charting, and geodesy (MC&G) requirements to the ... |
|
| Geologic Interpretation of Gravity Anomalies |
19 APR 90 |
|
| Authors:
B. A. Andreyev; I. G. Klushin; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| This Russian textbook provides a sufficiently complete and systematic illumination of physico-geologic and mathematical aspect of complex problem of interpretation of gravity anomalies. The rational methods of localization of anomalies are examined in detail. All methods of interpreting gravity anomalies are described which have found successful application in practice. Also given are ideas of some new methods of the interpretation of gravity anomalies, the prospects for further development and industrial ... |
|
| Proceedings of the Annual Gravity Gradiometer Conference (17th) Held in Hanscom AFB, Massachusetts on 12-13 October 1989 |
28 MAR 90 |
313 pages |
| Authors:
Christopher Jekeli; Gerald L. Shaw; GEOPHYSICS LAB (AFSC) HANSCOM AFB MA
|
| Fourteen papers were presented at this conference, reviewing the status of terrestrial gravity gradiometers, applications of gravity gradiometry and cryogenic gradiometer technology. The status of the Gravity Gradiometer Survey System (GGSS) was reviewed and the future of gradiometry was projected in terms of instrumentation and applications. The technical papers covered test program results, applications to gravity field mapping, gravity signal processing, geophysical interpretation, space applications, inertial navigation aiding, new instrumentation ... |
|
| Geophysical Studies Related to Geodetic Reference Frames |
09 FEB 90 |
|
| Authors:
John Wahr; COLORADO UNIV AT BOULDER DEPT OF PHYSICS
|
| This contract used to support work on several different problems: 1) Develop models to estimate the effects of atmospheric pressure loading on surface displacements and surface gravity. 2) Investigate the effects of aspherical core structure on the forced nutations. 3) We studied the possibility of aspherical structure inside the core, and its possible implications for geodetic and seismic constraints on the core-mantle boundary topography. Begin a study of the ocean's ... |
|
| Orbit Determination and Analysis for Aureole 2 Rocket at 27:2 Resonance |
FEB 90 |
|
| Authors:
A. N. Winterbottom; ROYAL AEROSPACE ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)
|
| Aureole 2 rocket (1973-107B) was launched on 26 December 1973 into an orbit of inclination 74 deg and eccentricity 0.1 and has an estimated lifetime of 30 years. The orbit has been determined from observations for 90 epochs between September 1983 and December 1984, during which time the orbit was expected to be influenced significantly by the effects of 27:2 resonance with the Earth's gravitational field; exact resonance occurred on ... |
|
| Eddy-Mean Energetics in the Gulf Stream during REX: Model/Data Intercomparisons |
90 |
|
| Authors:
J. D. Thompson; J. L. Mitchell; D. W. Blake; J. M. Dastugue; A. Wallcraft; NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
|
| A primary goal for REX is the description of the eddy-mean energetics of the Gulf Stream region from Cape Hatteras to the Grand Banks from in situ, remotely sensed, and ocean model studies. We have obtained estimates of mean and eddy available potential and kinetic energy using three years of data from the GEOSAT Exact-Repeat Missions (ERM). Temporal mean APE of the total water column is computed from annual and ... |
|
| Earth Model Selection for Computer Simulations |
15 DEC 89 |
|
| Authors:
J. J. Pich; S. S. Leroy; NAVAL RESEARCH LAB WASHINGTON DC
|
| Many scientific problems require the use of appropriate Earth models. This report presents a method of selecting from a variety of these models on the basis of range and and bearing errors and CPU timing considerations that are incurred by each. The report begins by examining two types of Flat models and determines the better of the two. The reference for the determinations of all errors is the DoD standard ... |
|
| Task Order 2 Enhanced Preliminary Assessment Defense Mapping Agency (DM), Herndon, Virginia |
DEC 1989 |
104 pages |
| Authors:
Laurence Smith; Katherine Blackburn; Lawrence Bove; Glenn Johnson; WESTON (ROY F) INC WEST CHESTER PA
|
| An enhanced Preliminary Assessment was conducted at the Defense Mapping Agency (DMA) site in Herndon, Virginia which is planned for inclusion in the Base Closure Program. The facility is located on approximately 12 acres of land in northern Virginia. Initially constructed as a NIKE missile Integrated Fire Control Area, the site is now administered by the U.S. Army Corps of Engineers and permitted to DMA. At the site DMA maintains ... |
|
| A Mathematical Appreciation of Antonio Marussi's Contributions to Geodesy |
20 NOV 89 |
|
| Authors:
J. D. Zund; NEW MEXICO STATE UNIV LAS CRUCES DEPT OF MATHEMATICAL SCIENCES
|
|
| Guidelines, Operational Procedures, and Quality Control for the Estimation of Geodetic Point Positions from GPS Data Collected with the TI4100 Receiver |
13 NOV 89 |
|
| Authors:
Stephen Malys; Peter A. Jensen; DEFENSE MAPPING AGENCY SYSTEMS CENTER RESTON VA
|
| The TI4100 receiver collects data from the NAVSTAR Global Positioning System of Satellites (GPS). The Defense Mapping Agency (DMA) and a number of other organizations have utilized these receivers to exploit GPS for a variety of geodetic applications. This report provides a comprehensive set of operational procedures and guidelines for the estimation of geodetic points positions (absolute positions) from data collected with the TI4100 receiver. The specific algorithms which are ... |
|
| Surface Topography of the Gulf Stream Region Derived from GEOSAT altimetry |
24 OCT 89 |
|
| Authors:
M. R. Carnes; J. L. Mitchell; NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS
|
|
| Ambiguity Bootstrapping to Determine GPS Orbits and Baselines |
10 OCT 89 |
|
| Authors:
Charles C. Counselman III; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
|
| Topological Foundations of the Marussi-Hotline Approach to Geodesy |
03 OCT 89 |
|
| Authors:
J. D. Zund; NEW MEXICO STATE UNIV LAS CRUCES DEPT OF MATHEMATICAL SCIENCES
|
| The usual formulation of the Hotline-Marussi approach to geodesy is essentially formal in character and makes no attempt to make precise the conditions under which the calculations are valid or address questions of existence and uniqueness. In the present paper we attempt to remedy this by translating various mathematical and physical requirements into topological assumptions. Topological methods are employed to study the family of equipotential surfaces (SIGMA) of the Earth's ... |
|
| The Role of the Topography in Gravity Gradiometer Reductions and in the Solution of the Geodetic Boundary Value Problem Using Analytical Downward Continuation |
SEP 89 |
|
| Authors:
Yan M. Wang; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE AND SURVEYING
|
| The effect of topography on gravity gradient data is considered and the effect of topography on the solution of the geodetic boundary value problem by using analytical downward continuation is also investigated. The validity of solving Molodensky's problem by using the analytical downward continuation is inspected. Even though it has been shown that the analytical downward continuation solution is equivalent to Molodensky's solution which is considered theoretically perfect, a very ... |
|
| Personal Attributes as Predictors of Military Leadership: A Study of Midshipmen Leaders at USNA |
01 AUG 89 |
|
| Authors:
Leanne Atwater; Francis J. Yammarino; STATE UNIV OF NEW YORK AT BINGHAMTON CENTER FOR LEADERSHIP STUDIES
|
| A set of variables assessing personal attributes (e.g., personality, thinking style, psychological type MBTI, interests, and life experiences) were investigated as predictors of transformational and transactional leadership in a sample of 107 midshipmen (focal) leaders at the U.S. Naval Academy. The midshipmen leaders provided self-report information on the personal attributes. Their 1235 plebe subordinates and the midshipmen's superiors provided ratings of the focal midshipmen's transformational and transactional leadership. Results from ... |
|
| Geodetic Point Positioning with GPS (Global Positioning System) Carrier Beat Phase Data from the CASA UNO Experiment |
01 AUG 89 |
|
| Authors:
Stephen Malys; Peter A. Jensen; DEFENSE MAPPING AGENCY SYSTEMS CENTER RESTON VA
|
| The Global Positioning System (GPS) carrier beat phase data collected by the T14100 GPS receiver has been sucessfully utilized by the US Defense Mapping Agency in an algorithm which is designed to estimate individual absolute geodetic point positions from data collected over a few hours. The algorithm uses differenced data from one station and two to four GPS satellites at a series of epochs separated by 30 seconds intervals, The ... |
|
| Determination of the Gravity Disturbance by Processing the Gravity Gradiometer Surveying System - Processing Procedure and Results |
AUG 89 |
|
| Authors:
Yan M. Wang; OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE AND SURVEYING
|
| The gravity gradiometer surveying system (GGSS) took the first flight in the Texas/Oklahoma area and the data were released in April, 1989. The main problem of processing the GGSS gradient data is that there is bias in the data. If the tie point values of the gravity gradient are available, then the bias can be removed from the GGSS gradient data by using crossover discrepancy adjustment. Since there are no ... |
|
| Automatic Line Network Extraction from Aerial Imagery of Urban Areas through Knowledge Based Image Analysis |
AUG 89 |
|
| Authors:
H. Fueger; K. Jurkiewicz; H. Kazmierczak; B. Nicolin; W. Ott; FORSCHUNGSINSTITUT FUER INFORMATIONS- VERARBEITUNG UND MUSTERERKENNUNG ETTLING EN (GERMANY F R)
|
| Different methods for automatic detection of line objects applied to aerial images to extract streets from urban scenes are investigated. First, test results achieved from two existing methods of low level iconic image processing by stream following (line tracking) and structured parallel operations (image filtering, feature extraction) are given. Second, a medium level iconic image processing method developed for edge and area segmentation is described and results from image segmentation ... |
|
| Gravity Gradiometer Survey System (GGSS) Post-Mission Data Processing Numerical Results |
AUG 89 |
|
| Authors:
Sam C. Bose; Glenn E. Thobe; APPLIED SCIENCE ANALYTICS INC CANOGA PARK CA
|
| 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 ... |
|
| Feasibility of Millimeter-Accuracy Geodetic Positioning and Vehicle Tracking with Repeater Satellites |
27 JUL 89 |
|
| Authors:
Laureano A. Cangahuala; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| The proposed 'Geobeacon' satellite can detect and locate transmitters of a geodetic positioning system as well as transmitters of an emergency search and rescue (SAR) system. Simple, low-power transmitters on the earth's surface will broadcast code-modulated signals which will be received and rebroadcast to a processing site by a constellation of repeater satellites. A SAR transmitter can transmit at one frequency. For geodetic applications, a transmitter must transmit signals at ... |
|
Geodesy
