| The Sensor Image Simulator |
22 JUN 1981 |
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| Authors:
Marshall B. Faintich; Paul C. Figura; E. W. Quinn; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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 | The primary objective of the digital sensor simulation investigations being conducted at the Defense Mapping Agency (DMA) is to establish an editing and analysis capability for the digital culture and terrain data bases. For purposes of quality control and data base applicability investigations, DMA has developed the Sensor Image Simulator (SIS), a very high speed data base edit station and static scene simulator that allows for interactive query and manipulation ... |
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| Digital Image Technology: Cartographic Systems at the Defense Mapping Agency Aerospace Center |
1981 |
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| Authors:
Marshall B. Faintich; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The Defense Mapping Agency Aerospace Center has developed a program to exploit digital image technology for the advancement of mapping, charting, and geodesy. Primary investigations include image processing, analysis, and display techniques, and computer image generation. A dramatic impact has been made in the ability to produce, analyze, and validate digital data bases produced by the Defense Mapping Agency by applying state-of-the-art digital image technology concepts to the development of ... |
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| A Standard for Symbology on Engineering Scale Maps, |
18 APR 1980 |
24 pages |
| Authors:
Robert Paul Jacober Jr; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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 | Though many organizations have been studying the need for or emphasizing the need for a standard set of map symbols for large scale maps (1:240 to 1:4800), little to date has been done to develop a standardized legend. The main problems associated with producing a standard legend are: to provide a unique symbol for each feature, to be able to computer-program the symbols, to implement the standard once it is ... |
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| Digital Image Technology: 1980; Emerging Production Applications. |
05 MAR 1980 |
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| Authors:
Marshall B. Faintich; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The Defense Mapping Agency Aerospace Center has developed a program to exploit digital image technology for the advancement of mapping, charting, and geodesy. Primary investigations include image processing, analysis, and display techniques, and computer image generation. A dramatic impact has been made in the ability to produce, analyze, and validate various digital data bases produced by the Defense Mapping Agency by applying state-of-the-art digital image technology concepts to the development ... |
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| Interactive Digital Terrain Data Displays. |
25 FEB 1980 |
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| Authors:
Richard A. Berg; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The Defense Mapping Agency produces and maintains cartographic digital data bases in support of military flight simulation and aeronautical operations. These data bases include terrain elevations over various geographic areas, stored in grids of varying intervals. In order to have effective management of these digital data bases, it is necessary to display them quickly, in a format which permits human comprehension of the information. An Image Manipulation Station (IMS) has ... |
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| Digital Sensor Simulation at the Defense Mapping Agency Aerospace Center, |
1979 |
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| Authors:
Marshall B. Faintich; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The primary objective of the digital sensor simulation investigations being conducted at the Defense Mapping Agency Aerospace Center (DMAAC) is to establish an editing and analysis capability for digital culture and terrain data bases. These data bases are being produced by DMAAC to support advanced aircraft simulators by providing an improved low level radar training capability offered by digitally generated radar landmass images. As a result of the technology developed ... |
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| Gravitational Modeling. |
SEP 1976 |
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| Authors:
Charles W. Beierle ; Walter J. Rothermel; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Formulas for computing the gravitational effect of some simple two-and three-dimensional geometric figures are presented in forms suitable for use with digital computers and in many cases, programmable desk calculators. Basic computation schemes are presented for complex two-and-three-dimensional bodies of arbitrary shape. Some simple inversion rules or techniques are presented which yield approximations of depth based on simple geometric figures. Such inversion techniques are particularly applicable where gravity measurements are ... |
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| Recovery of Gravity Anomalies from Gridded Geoid Height Data. |
JUL 1976 |
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| Authors:
Melvin E. Shultz; Robert M. Perlman; Joel B. Starkey; James M. Barth; Daniel J. Browning; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| A gridded data base of geoid heights can be developed from GEOS-III satellite altimetry data. The derivation of two methods is discussed. A procedure for estimating gravity anomalies from the resulting geoid heights is described with simulations shown in tabular and graphic form. The report also discusses the computation of the calibration geoid for the GEOS-III test region, the data base from altimetry data and the simulation of test data ... |
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| Gravimetric Parameters (Zeta, Xi, Eta) for the Redondo Peak Region of New Mexico, as Calculated from Terrain Corrected Gravity Anomalies, |
APR 1976 |
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| Authors:
Inez J. Dimitrijevich; Jarold J. G'Schwind; John A. Treiber; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Terrain corrected point free-air gravity anomaly data, covering a 2 degree x 2 degree zone in the Redondo Peak region of New Mexico, has been used to calculate a gridded set of gravimetric height anomalies (zeta) and deflection of the vertical components (xi, eta) within a 100 km x 100 km area centered in the zone. Terrain corrections within this zone attain values of up to 32 milligals, causing resultant ... |
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| Digital Sensor Simulation, |
1976 |
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| Authors:
Marshall B. Faintich; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Regional Gravity and Elevation Maps of Greenland, |
OCT 1975 |
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| Authors:
Luman E. Wilcox; James T. Voss; Paul F. Pals; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Maps of Bouguer and free-air gravity anomalies, regional structure, glacial ice thickness, elevation of bed rock, and topographic elevation are prepared for Greenland. The maps are contoured representations of 1 degree x 1 degree mean values. The Bouguer and free-air anomaly maps are based entirely upon values predicted by geophysical gravity correlation methods. The other maps are compiled from a variety of sources. The gravity anomaly variations are discussed with ... |
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| Holdings, Storage and Retrieval of DOD Gravity Library Data, |
SEP 1975 |
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| Authors:
Larry L. Dotson; Edward B. Reinholtz; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The Department of Defense (DOD) Gravity Library, maintained by the Defense Mapping Agency Aerospace Center, has grown from a small card storage file to a massive data file contained on magnetic tapes. In the growth process, the library has progressed from the use of a various assortment of card processing equipment to the use of a UNIVAC 1108 computer system. The tremendous increase in holdings and requirements necessitated the establishing ... |
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| HARMOGRAV. A Spherical Harmonic Function to Represent the Earth's Gravitational Potential |
JUN 1975 |
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| Authors:
Vojislav Dimitrijevich; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| A new way to estimate a composite earth gravity model, representing 5 deg X 5 deg equal area gravity anomalies, by harmonic coefficients of the earth's gravity potential is demonstrated. This earth gravity model represents a pure terrestrial gravitational potential, developed by conventional mathematical formulas. The observational data used in the development was restricted to mean gravity anomalies derived from surface gravity measurements. The mean gravity anomalies representing the unsurveyed ... |
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| Comparison Between Naval Surface Weapons Center and Navy Astronautics Group Ephemerides for GEOCEIVER Positioning. |
MAY 1975 |
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| Authors:
Haschal L. White; Donovan N. Huber; Jerry L. Taylor; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Current procedures for GEOCEIVER positioning use GEOCEIVER tracking data in conjunction with Navy Navigation Satellite (NNS) ephemerides as produced by the Naval Surface Weapons Center (NSWC) and based on a worldwide tracking system. The Navy Astronautics Group (NAVASTROGRU) also produces ephemerides for these satellites in near real time but based on a four station tracking net (OPNET). These study results indicate that GEOCEIVER coordinate differences of about ten meters can ... |
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| Techniques for the Derivation and Evaluation of Truncated Gravitational Models for Special Applications. |
MAY 1975 |
35 pages |
| Authors:
George T. Stentz; Haschal L. White; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| In many applications, it is necessary to use a truncated gravitational model because of limitations in computer hardware and software or mission requirements. Consequently, studies have been performed to evaluate the effect of truncation and also to determine the best method for the derivation of eighth and 12th degree and order gravitational models. Three methods were used for their derivation; truncation by chopping the original more complete model, suppression of ... |
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| The Preparation of Technical Publications. |
MAR 1975 |
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| Authors:
Jerry J. Becker; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Most writers of technical publications within the Defense Mapping Agency Aerospace Center (DMAAC) are scientists in the fields relating to mapping charting and geodesy. Their forte is in their respective field and rely on technical publications such as this publication to assist them in putting their scientific notations in a well organized, standard format. This technical publication was developed to provide the standard steps used by a technical writer in ... |
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| Fully Automated Compilation of Gravity and Geophysical Maps. |
SEP 1974 |
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| Authors:
Luman E. Wilcox; Joe M. Estes; Walter Czarnecki; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| A wide variety of gravity and geophysical maps can be produced by fully automated methods. The locations of gravity measurements, gravity anomaly values, gravity anomaly contours, continental outlines, title, legend, labels, and other data to be shown on the maps are computer generated, then drawn by automatic plotting equipment. This procedure is used to prepare charts showing the density and distribution of gravity data holdings, contoured gravity anomaly maps and ... |
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| An Analysis of Gravity Prediction Methods for Continental Areas, |
AUG 1974 |
308 pages |
| Authors:
Luman E. Wilcox; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Mean gravity anomaly values which represent 1 degree x 1 degree surface areas can be predicted on the continents by geophysical gravity correlation methods whether or nor measured gravity data exists within those 1 degree x 1 degree areas. These methods take into consideration the earth's structure, composition, and response to changes in surficial mass distribution by means of observed or computed correlations between gravity and other geophysical parameters within ... |
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| An Empirical Method for the Determination of Gravity Terrain Corrections, |
JUL 1974 |
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| Authors:
James T. Voss; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Terrain corrections are usually estimated by laborious determinations of the topographic relations around the gravity station out to distances of 22 to 160 kms on a zone and compartment basis. A systematic measuring of the maximum topographic slope and the mean relative relief out to different distances around gravity stations for which the terrain correction was known showed that a set of empirically derived curves could be established relating the ... |
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| Mapping Plate Boundaries with Reference to Mean Gravity Anomalies, |
JUL 1974 |
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| Authors:
Luman E. Wilcox; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| A global chart showing plate boundaries as defined by the 1 degree x 1 degree mean free air gravity anomaly holdings of the Dept. of Defense Gravity Library is presented. The chart confirms and, in some cases, redefines the plate boundaries as now delineated from seismic and magnetic evidence. The gravity anomaly values have patterns suggesting that there are fossil or inactive subduction zones bounding the south side of the ... |
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| 1 Degree x 1 Degree Mean Free-Air Gravity Anomalies. |
DEC 1973 |
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| Authors:
DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The publication presents a current set of 1 degree x 1 degree mean free-air gravity anomalies, their respective estimated standard errors and the method used to compute/predict the magnitude of the anomalies. |
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| A Bouguer Gravity Anomaly Map of Africa. |
DEC 1973 |
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| Authors:
Rolf L. Slettene; Luman E. Wilcox; Ronald S. Blouse; Joseph R. Sanders; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| A Bouguer Gravity Anomaly Map of Africa has been compiled using only terrestrial data. The map is a contoured representation of one degree x one degree mean anomaly values. Some one degree x one degree values are computed by conventional or statistical means directly from observed gravity data held at DMAAC in the DOD Gravity Library. The majority of the one degree x one degree values are predicted by geophysical-gravity ... |
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| Computational Methods for Determining 1 degree x 1 degree Mean Gravity Anomalies and Their Accuracies. |
NOV 1973 |
36 pages |
| Authors:
DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The publication contains the explanations of the methods used in computing the 1 degree x 1 degree mean free-air gravity anomaly values and their accuracies. The information contained in this report is in two parts. Part I identifies each computational method, gives a written definition, and furnishes the equations with a sample computation. When and how the method should be used and any strengths and shortcomings of the method are ... |
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| Analysis and Techniques to Determine Earth Gravitational Models. |
JAN 1973 |
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| Authors:
Haschal L. White; DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| Research is in progress at the Defense Mapping Agency Aerospace Center (DMAAC) to develop an improved earth gravitational model from a combination of satellite tracking and surface mean free-air gravity anomaly data. Analysis and techniques for obtaining combination solutions as well as the resulting gravitational model evaluation procedures are discussed. For comparison purposes, some of the evaluation procedures applied to the DMAAC derived and the 1969 Smithsonian Standard Earth (II) ... |
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| Theoretical Gravity Values Geodetic Reference System 1967. |
1967 |
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| Authors:
DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AIR FORCE STATION MO
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| The Special Gravity Report contains a table of theoretical gravity values for each 1 degree latitude band on the earth's surface. These values were computed by the Department of Defense Gravity Library from the Gravity Formula 1967 listed in Special Publication No. 3, Geodetic Reference System 1967, of the International Association of Geodesy. These values are distributed as an aid to the scientific community in the study of Geodesy and ... |
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