| An Engineering Trade Space Analysis for a Space-Based Hyperspectral Chromotomographic Scanner |
26-Mar-2009 |
161 pages |
| Authors:
Phillip Sheirich; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | Hyperspectroscopy for fast transient events such as battlefield explosions is an undeveloped area of spectral imaging. This thesis is a discussion of issues involved with taking a laboratory design for a rotating prism hyperspectral chromotomographic (CT) instrument and producing a first approximation satellite payload design, operating scheme and trade space analysis to support demonstration of this technology in low-earth orbit. This instrument promises the capability of adding a time dimension ... |
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| The Effects of Temperature and Electron Radiation on the Electrical Properties of AlGaN/GaN Heterostructure Field Effect Transistors |
Mar-2009 |
120 pages |
| Authors:
Jeffrey T Moran; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| AlGaN/GaN Heterostructure Field Effect Transistors (HFETs) have come under increased study, in recent years, owing to their highly desirable material and electrical properties, ruggedness, and survivability even during and after exposure to extreme temperature and radiation environments. These devices or similar devices constructed of AlGaN and/or GaN materials are being researched for their potential applications in many military and space based systems. In this study, unpassivated and SiN passivated Al(0.27)Ga(0.73)N/GaN ... |
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| Remote Detection of Cloud Base Heights Using CloudSat and CALIPSO |
Mar-2009 |
63 pages |
| Authors:
Elizabeth Welliver; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis study focuses on the evaluation of cloud base height from a pair of space-based remote sensing systems. The first satellite, CloudSat, is a 94-GHz cloud profiling radar (CPR) utilizing a wavelength capable of penetrating thick hydrometeor layers. The second satellite, the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite, is an active lidar designed to detect optically thin hydrometeor layers. The 2BGEOPROF- Lidar product combines data from ... |
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| Space and U.S. Security. A Net Assessment |
Jan-2009 |
106 pages |
| Authors:
INSTITUTE FOR FOREIGN POLICY ANALYSIS INC CAMBRIDGE MA
|
| The purpose of the Space and U.S. Security Net Assessment undertaken by the Institute for Foreign Policy Analysis (IFPA) is to survey the current status of U.S. space activities and to draw comparisons with other countries that have developed space programs in recent decades. Our goal is also to project major trends into a 10-20 year timeframe to identify factors that may have important implications positively or negatively on the ... |
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| LIDAR Design for Space Situational Awareness |
01-Sep-2008 |
97 pages |
| Authors:
David Gast; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Space Situational Awareness (SSA) is a growing concern for National Security Among the many methods of increasing SSA is the use of space-based Laser Imaging, Detection And Ranging (LIDAR) sensors to detect, track, classify or image other spacecraft. This Thesis explores the unique trade-spaces and design decisions faced by an engineer designing such a system. It provides an overview of the basic operational principles, the major components, the impact of ... |
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| A Comparative Analysis Of Guidance Laws for Boost-Phase Ballistic Missile Intercept Using Exo-Atmospheric Kill Vehicles |
MAY 2008 |
61 pages |
| Authors:
Sang-Keun Jang; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE
|
| Boost-phase intercept of a threat intercontinental ballistic missile (ICBM) is the first layer of a multi-layer missile defense strategy. Space-based interceptors possess certain kinematic advantages over ground-based interceptors in defeating an ICBM threat during boost phase. This paper explores the performance of various guidance laws that might be used by an exo-atmospheric kill vehicle (EKV) launched from a space platform to defeat a hostile, ground-launched ICBM during boost phase. Proportional ... |
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| Determining the Capability Requirements for a Space-Based Optical Sensor to Determine the Trajectory of an Incoming Antisatellite Weapon |
01-Mar-2008 |
131 pages |
| Authors:
Mesut Guelmuesh; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The goal of this research is to build up a logic to catch and track the incoming ASAT weapons by using space-based onboard optical sensors. The satellite orbit and ASAT trajectory of the Chinese test were generated to relate the research to the real world application. These position and velocity values are used to generate simulated observation data for the imaginary sensor on the targeted satellite. These observation values are ... |
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| Process Time Refinement for Reusable Launch Vehicle Regeneration Modeling |
MAR 2008 |
188 pages |
| Authors:
Joseph A. Servidio; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF SYSTEMS AND ENGINEERING MANAGEMENT
|
| To sustain operational effectiveness, the Air Force has invested in the research and development of space-based technologies. Certain ongoing spacelift research efforts are focused on developing operationally responsive Reusable Military Launch Vehicles (RMLV) capable of launching payloads into orbit within hours of a tasking notification. Previous Air Force Research Laboratory-sponsored AFIT studies have resulted in the development of the MILEPOST discrete-event simulation model. This model has enabled the ability to ... |
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| Space Power Theory: Controlling the Medium Without Weapons in Space |
MAR 2008 |
|
| Authors:
Don L. Wilkerson; ARMY WAR COLL CARLISLE BARRACKS PA
|
 | Since space operations are inherently joint, the Services have strived to normalize and operationalize space operations for military utility Services rely heavily on space-based force enhancement capabilities as combat multipliers for on-demand communications, navigation, missile early warning, reconnaissance and surveillance The protection of U.S. strategic space assets and the ability to negate enemy space systems is essential to U.S. space strategy in controlling the geographical environment of space, predominately in ... |
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| Eliminating Space Debris: Applied Technology and Policy Prescriptions, Fall 2007 - Project 07-02 |
Jan-2008 |
139 pages |
| Authors:
Kevin Johnson; Hudson; John G II; Stephanie Silva; Jared Brower; Stehanie Cook; Edward Dae; Josh Koch; Miller Miller; STRATEGIC COMMAND OMAHA NE GLOBAL INNOVATION AND STRATEGY CENTER
|
| Communications, global commerce and national defense are highly dependent on satellite constellations. This report details how space debris threatens valuable space-based technology essential to these critical areas. Objects in lower earth orbit (LEO) pose the greatest immediate threat to space-based assets. This paper focuses on all sizes of debris found in LEO. What follows is a comprehensive analysis of the problem of space debris, specifically targeting policies that facilitate debris ... |
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| The Effectiveness of the U.S. Missile Defense Capabilities as a Deterrent to the North Korean Missile Threat |
DEC 2007 |
75 pages |
| Authors:
Issac G. Gipson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Over the last five years, America has placed an ever-increasing emphasis on missile defense and currently spends nearly $10 billion annually on its development. The United States current missile Defense system is integrated; it depends on the cooperation of defensive elements aboard ships, on land, in the air and space. The objective is to provide a layered defense with multiple opportunities to destroy an incoming missile. By investing heavily in ... |
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| Performance Comparison of RADARSAT-2 Advanced Moving Object Detection Experiment Modes |
DEC 2007 |
|
| Authors:
S. Chiu; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)
|
| It has been recognized that a two-aperture approach to ground moving target indication is sub-optimum and that target parameter estimation is often compromised by clutter interference or poor signal-to-clutter ratios. This paper investigates the Ground Moving Target Indication (GMTI) performance of several virtual channel concepts proposed for the RADARSAT-2 Moving Object Detection EXperiment (MODEX). These are capable of increasing the spatial diversity of RADARSAT-2 by exploiting its very flexible antenna ... |
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| Doppler Asymmetric Spatial Heterodyne Spectroscopy (DASH): Concept and Experimental Demonstration |
10 OCT 2007 |
12 pages |
| Authors:
Christoph R. Englert; David D. Babcock; John M. Harlander; NAVAL RESEARCH LAB WASHINGTON DC SPACE SCIENCE DIV
|
| We describe the concept of Doppler asymmetric spatial heterodyne spectroscopy (DASH) and present a laboratory Doppler-shift measurement using an infrared laser line. DASH is a modification of spatial heterodyne spectroscopy optimized for high precision, high accuracy Doppler-shift measurements of atmospheric emission lines either from the ground or a satellite. We discuss DASH design considerations, field widening, thermal stability and tracking, noise propagation, advantages, and trade-offs. DASH interferometers do not require ... |
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| Smaller Satellite Operations Near Geostationary Orbit |
SEP 2007 |
241 pages |
| Authors:
Matthew T. Erdner; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| With the ongoing miniaturization of components, the utility of smaller satellites is increasing. Many believe in the near future that small satellites will be able to perform all functions that larger satellites currently perform today. It has been suggested that these satellites will be less expensive, thus offer a lower risk to the consumer in case they fail before their mission design life. This paper looked at the ability to ... |
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| Controlled Precipitation of Radiation Belt Particles |
23 AUG 2007 |
18 pages |
| Authors:
Umran S. Inan; Timothy F. Bell; Timothy W. Chevalier; STANFORD UNIV CA SPACE TELECOMMUNICATIONS AND RADIOSCIENCE LAB (STAR)
|
| The overall objectives of this work are to: * Quantify the requirements for controlled precipitation of radiation belt particles in order to mitigate space particle effects * Address the issue of coupling of space based antennas to the surrounding magnetoplasma for use in system design * Determine radiated power from single transmitting element The completion of these goals requires the design of antenna-in-plasma codes which simulate the interaction of radiating ... |
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| Transformational Satellite (TSAT) Communications Systems. Falling Short on Delivering Advanced Capabilities and Bandwidth to Ground-Based Users |
JUL 2007 |
36 pages |
| Authors:
Maurice M. McKinney; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
|
| The Transformational Communications Office's (TCO) 17 December 2003 report states, "The current SATCOM and data relay systems are unable to meet future bandwidth demands. They lack capacity, in both aggregate data rate and the number of users they can support.... Furthermore, the life expectancies of the existing space segments and much of their associated terminal and management segments do not extend beyond the 2010-2015 time frame." These shortfalls and the ... |
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| Excitation of the Magnetospheric Cavity |
16 JUN 2007 |
44 pages |
| Authors:
Timothy F. Bell; Prajwal Kulkarni; STANFORD UNIV CA SPACE TELECOMMUNICATIONS AND RADIOSCIENCE LAB (STAR)
|
| Stanford University carried out a detailed study of the following topics: 1) the optimum orbit for exciting the magnetospheric cavity resonance by a space-based ELF/VLF transmitter, 2) the antenna type and configuration necessary to excite various cavity modes with the radiated ELF/VLF waves, 3) the effects of Landau damping on the ELF/VLFL waves within the cavity, 4) the effectiveness of the radiated ELF/VLF cavity waves in precipitating energetic radiation belt ... |
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| Towards Improved Operational Command and Control of Space Weapons |
10 MAY 2007 |
26 pages |
| Authors:
Chad J. Davis; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| Recently, discussions concerning the weaponization of space have begun to reach a crescendo. Political and military leaders within the United States have started expanding the national discussion regarding this highly debated topic. This paper will not focus on the weaponization debate as a matter of policy, but rather will offer options for operational command and control of space weapons hypothetically deployed. Two broad categories are analyzed: command and control using ... |
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| Determining Logistics Ground Support Manpower Requirements for a Reusable Military Launch Vehicle |
MAR 2007 |
253 pages |
| Authors:
Sydney C. Michalski; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Successful space-based technologies like satellite imagery and GPS have increased military demand for a rapid-response launch capability. AF Space Command's Operationally Responsive Spacelift program was developed to ensure that the AF has the capability to launch a payload into orbit within hours of a tasking notification, and requires development of a new space launch vehicle. The Reusable Military Launch Vehicle (RMLV) is currently in the design phase. The AF Research ... |
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| Simulation of HEAO 3 Background |
2007 |
6 pages |
| Authors:
B. L. Graham; B. F. Phlips; R. A. Kroeger; J. D. Kurfess; GEORGE MASON UNIV FAIRFAX VA
|
| A Monte Carlo technique for modeling background in space-based gamma-ray telescopes has been developed. The major background components included in this modeling technique are the diffuse cosmic gamma-ray flux, the Earth's atmospheric flux, the decay of nuclei produced by spallation of cosmic rays, trapped protons and their secondaries, the decay of nuclei produced by neutron capture, and the de-excitation of excited states produced by inelastic scattering of neutrons. The method ... |
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| Optical Reference Star Catalogs for Space Surveillance: Current Status and Future Plans |
2007 |
12 pages |
| Authors:
P. K. Seidelmann; R. Gaume; N. Zacharias; K. Johnston; B. Dorland; NAVAL OBSERVATORY WASHINGTON DC
|
| The current status of existing star catalogs of relevance for Space Surveillance applications will be reviewed. Hipparcos and Tycho 2 provided reference stars with milliarcsecond (mas) accuracies at their epoch of 1991.25. During the 16 years since then, the proper motion uncertainties have reduced the accuracies significantly. Ground-based programs such as the USNO CCD Astrograph Catalog (UCAC) will soon provide an all-sky, astrometrically accurate (20-70 mas) reference star catalog to ... |
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| Optical Properties of III-V Semiconductor Nanostructures and Quantum Wells |
31 DEC 2006 |
34 pages |
| Authors:
Omar Manasreh; ARKANSAS UNIV FAYETTEVILLE DEPT OF ELECTRICAL ENGINEERING
|
| We have investigated the optoelectronic applications of interband and intersubband transitions in III-V semiconductors quantum wells and quantum dots. The research efforts included the investigation of intersubband transitions in GaN/AlGaN multiple quantum wells for the 1.3 and 1.5 micron spectral ranges. These wavelengths are important for optical communications. Furthermore, we investigated single wall carbon nanotubes for possible use as space-based solar cell. The final report contains detail discussions of the ... |
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| Emerging and Future Technologies for Space Based Operations Support to NATO Military Operations (North Atlantic Treaty Organization Research and Technology Organisation Specialists' Meeting). Technical Evaluation Report |
01 DEC 2006 |
5 pages |
| Authors:
NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
|
| All together 25 papers were presented at the seminar as oral speeches. Of these, three were keynote speeches. In addition, eight poster papers were displayed in the conference area. The presentations covered a relatively broad range of topics related to space exploitation and exploration. The basic message from most of the speakers was that the battle field will be served/supported by space based systems in a much higher degree than ... |
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| Harnessing the Heavens: National Defense through Space |
NOV 2006 |
32 pages |
| Authors:
Elwood L. White; AIR FORCE ACADEMY COLORADO SPRINGS CO LIBRARY
|
| This "Special Bibliography Series," Number 106, *Harnessing the Heavens: National Defense Through Space," was developed by History Bibliographer and Reference Librarian Mr. Elwood L. White, in support of the 21st Triennial (previously biennial) Military History Symposium to be held at the Air Force Academy, 1-3 November 2006. This bibliography lists a selected portion of the McDermott (Cadet) Library's holdings on national defense through space. While it includes books and journal ... |
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| Space-Based Observations of Satellites From the MOST Microsatellite |
NOV 2006 |
|
| Authors:
R. L. Scott; B. Wallace; D. Bedard; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)
|
| On October 12th 2005, Canada's MOST spacecraft acquired Canada's first microsatellitebased observations of a deep space satellite. MOST repeated this success by conducting an observation on a different spacecraft the following day. This report summarizes the experimental setup, access particulars, metric and photometry data. Comparison of the derived orbital metric data with high precision ephemerides yielded root mean square errors of 13 arcseconds. The errors are shown to result largely ... |
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| The Origin Billions Star Survey: Galactic Explorer |
18 OCT 2006 |
16 pages |
| Authors:
K. J. Johnston; B. Dorland; R. Gaume; G. Hennessy; R. Olling; N. Zacharias; B. Behr; M. Efroimsky; A. Hajian; H. Harris; NAVAL OBSERVATORY WASHINGTON DC
|
| The Origins Billions Star Survey is a mission concept addressing the astrophysics of extrasolar planets, Galactic structure, the Galactic halo and tidal streams, the Local Group and local supercluster of galaxies, dark matter, star formation, open clusters, the solar system, and the celestial reference frame by determining the position, parallax, and proper motion, as well as photometry, for billions of stars down to 23rd visual magnitude. It is capable of ... |
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| Laser Space Propulsion Overview (Preprint) |
22 AUG 2006 |
|
| Authors:
Claude Phipps; James Luke; Wesley Helgeson; PHOTONIC ASSOCIATES SANTA FE NM
|
| In this paper, we review the history of laser space propulsion from its earliest theoretical conceptions to modern practical applications. Applications begin with the "Lightcraft" flights of Myrabo and include practical thrusters for satellites now completing development as well as proposals for space debris removal and direct launch of payloads into orbit. We consider laser space propulsion in the most general sense, in which laser radiation is used to propel ... |
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| Addressing the Requirements for RF Photonics |
AUG 2006 |
10 pages |
| Authors:
George A. Brost; AIR FORCE RESEARCH LAB ROME NY SENSORS DIRECTORATE
|
| This paper addresses the relationship between system requirements and device specifications and figures of merit for RF Photonic applications. This paper has focused on the optical modulator, as it is the key component in achieving the required RF performance within the constraints of space-based platforms. The modulator transfer function can be used to express the key parameters of the modulator, which are then used characterize the photonic link performance; G, ... |
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| Dynamics and Control of Tethered Satellite Formations for the Purpose of Space-Based Remote Sensing |
AUG 2006 |
296 pages |
| Authors:
Kurt A. Vogel; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This dissertation assesses the utility of tethered satellite formations for the space-based remote sensing mission. Energy dissipation is found to have an adverse effect on foundational rigid body (Likins-Pringle) equilibria. It is shown that a continuously earth-facing equilibrium condition for a fixed-length tethered system does not exist since the spin rate required for the proper precession would not be high enough to maintain tether tension. The range of required spin ... |
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| Hubble Space Telescope: Should NASA Proceed with a Servicing Mission? |
29 JUN 2006 |
|
| Authors:
Daniel Morgan; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The National Aeronautics and Space Administration (NASA) estimates that without a servicing mission to replace key components, the Hubble Space Telescope will cease scientific operations in 2008 instead of 2010. In January 2004, then-NASA Administrator Sean O'Keefe announced that the space shuttle would no longer be used to service Hubble. He indicated that this decision was based primarily on safety concerns in the wake of the space shuttle Columbia accident ... |
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| Space Weather Applications of the UAF Eulerian Parallel Polar Ionosphere Model (EPPIM) |
01 JUN 2006 |
15 pages |
| Authors:
Sergei Maurits; Anton Kulchitsky; Brenton Watkins; ALASKA UNIV FAIRBANKS
|
| UAF EPPIM is the first principles theoretical model of the polar ionosphere, which covers region pole ward from 50 N of geomagnetic latitude, and altitudes from 80 to 900-1000 km. If available, the model can input real data or, conversely, it is capable of generating all necessary inputs using statistical modules (e.g., MSIS, electric field, precipitation intensity, etc.) incorporated into the model and driven by the standard set of geophysical ... |
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| Surveillance of Space - Optimal Use of Complementary Sensors for Maximum Efficiency |
Apr-2006 |
38 pages |
| Authors:
R P Donnelly; C J Condley; DEFENCE SCIENCE AND TECHNOLOGY LAB PORTSDOWN WEST (UNITED KINGDOM)
|
| The UK has conducted a number of studies into the requirements for Surveillance of Space and the associated analysis and dissemination issues which emerge that are needed to produce a Recognised Space Picture. The UK also has existing niche capability in a number of areas related to Surveillance of Space and potential in a number of other areas that could be harnessed for this purpose. For example, use of ground-based ... |
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| United States Policy on Weapons in Space |
15 MAR 2006 |
21 pages |
| Authors:
Donald P. Christy; ARMY WAR COLL CARLISLE BARRACKS PA
|
| The Space Commission Report identifies the United States' ever-growing reliance on space and space technology both militarily and economically. It outlines the vulnerabilities of its systems and warns that it must be prepared to prevent a "Space Pearl Harbor." Does this concern dictate that the next logical step is to begin the process of space weaponization? United States government space policy is under review and may alter the current "wait ... |
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| Space-Based Positioning, Navigation and Timing Policy (The Tension between Military and Civil Requirements) |
10 FEB 2006 |
20 pages |
| Authors:
Bruce G. Smith; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Since the Air Force declared the Global Positioning System (GPS) fully operational in 1995 it has transformed U.S. military operations as well as civil services and business. Recognizing the vital role GPS has in both enabling modern U.S. military operations as well as powering the global information-based economy President Bush signed the National Security Presidential Directive (NSPD): U.S. Space-Based Positioning Navigation and Timing (PNT) Policy in December 2004. The policy's ... |
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| Issues and Implications of the Thermal Control System on the "Six Day Spacecraft" |
2006 |
16 pages |
| Authors:
Andrew D. Williams; Scott E. Palo; AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE
|
| One aspect that poses a significant hurdle to achieving the goals of Operationally Responsive Space (ORS) and the six day satellite is the thermal control system (TCS). Traditionally the TCS must be vigorously designed, analyzed, tested, and optimized from the ground up for every satellite mission. This reinvention of the wheel is costly and time intensive. Current design cycles require years. Next generation satellite thermal management must be robust, modular, ... |
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| Improving the Development and Utilization of Air Force Space and Missile Officers |
2006 |
|
| Authors:
Georges Vernez; Craig Moore; Steven Martino; Jeffrey Yuen; RAND CORP SANTA MONICA CA
|
| Numbering about 3,450 officers during 2001, the 13S career field (space and missile operations) in 1994 merged the separate space and missile career fields. While the nation's intercontinental ballistic missile force has shrunk substantially during the service of many of today 's officers, the space-based systems for navigation, surveillance, warning, and communication have become more numerous. Although missile jobs remain more numerous for junior officers, increasingly more space-oriented jobs are ... |
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| A Novel, Light Weight Solar Array: Comparison with Conventional Systems |
2006 |
6 pages |
| Authors:
Jr. Vendura George J.; Patrick Malone; Larry Crawford; L'GARDE INC TUSTIN CA
|
| A novel, lightweight solar panel design is described that incorporates the best features from three separate areas of development: (1) advanced solar cells; (2) light weight, flexible blanket technology; and (3) deployment by inflation. In this study, inflation-deployed panels of various powers incorporating four different types of low mass solar cells are investigated with respect to conventional systems. Depending on panel size and cell type, five-fold and three-fold improvements in ... |
|
| The Kepler Mission and Eclipsing Binaries |
2006 |
9 pages |
| Authors:
David Koch; William Borucki; Gibor Basri; Timothy Brown; Douglas Caldwell; Jorgen Christensen-Dalsgaard; William Cochran; Edna DeVore; Edward Dunham; Thomas N. Gautier; NAVAL OBSERVATORY WASHINGTON DC
|
| The Kepler Mission is a space-based photometric mission with a differential photometric precision of 14 ppm (at V = 12 for a 6.5 hour transit). It is designed to continuously observe a single field of view (FOV) of greater then 100 square degrees in the Cygnus-Lyra region for four or more years. The primary goal of the mission is to monitor more than one-hundred thousand stars for transits of Earth-size ... |
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| Excitation of the Magnetospheric Cavity by Space-Based ELF/VLF Transmitters |
30 DEC 2005 |
11 pages |
| Authors:
Timothy F. Bell; STANFORD UNIV CA SPACE TELECOMMUNICATIONS AND RADIOSCIENCE LAB (STAR)
|
| During the period of performance, Stanford University completed the development of integral equations describing the distribution of current along a dipole antenna radiating ELF/VLF waves in the magnetospheric cavity. It was found that the radiation resistance was much smaller near the lower-hybrid resonance frequency than previously believed. Stanford University included the effects of ion temperature in the plasma dielectric tensor. It was found that the ion temperature had a first-order ... |
|
| Three-Dimensional Nano-Lithography for Emerging Technologies |
27 SEP 2005 |
11 pages |
| Authors:
Dennis W. Prather; DELAWARE UNIV NEWARK
|
| Grayscale lithography has shown particular success in the pursuit of surface machining capabilities because of the flexibility and convenience it offers in the fabrication of arbitrary three-dimensional surfaces. Accordingly, grayscale lithography has been demonstrated for a wide range of applications, including refractive and diffractive optical elements for focusing and beam shaping, optical interconnects, and MEMS. While our original motivation for this research area was the fabrication of three different micro-optical ... |
|
| Conventional Prompt Global Strike: Valuable Military Option or Threat to Global Stability? |
SEP 2005 |
158 pages |
| Authors:
Todd C. Shull; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF NATIONAL SECURITY AFFAIRS
|
| This thesis examines the potential destabilizing implications of conventional prompt global strike capabilities that operate from or through space. Existing material on this subject is largely limited to debates over the merits of terrestrial verses space basing and arguments against deployment over perceived increases in the likelihood of inadvertent nuclear war. This thesis addresses these issues, but takes the next step and analyzes the root causes and proposes possible solutions ... |
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| An Approach for Optimizing the On-Orbit Servicing Architecture for a Given Client Satellite Constellation |
24 AUG 2005 |
91 pages |
| Authors:
Michael L. McConnell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Satellite systems, once operational, are essentially a consumable item with no capacity to maintain, repair, or upgrade them while on-orbit. In order to avoid having to replace costly space assets, the Defense Advanced Research Projects Agency (DARPA) and Air Force Space Command (AFSPC) are looking to developing programs to provide an on-orbit servicing capability for future satellite systems under development, such as the Space-Based Radar (SBR) system. DARPA and AFSPC ... |
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| Solar Thermal Propulsion for Small Spacecraft - Engineering System Development and Evaluation |
JUL 2005 |
|
| Authors:
Takashi Nakamura; Robert H. Krech; James A. McClanahan; James M. Shoji; Russell Partch; Skylar Quinn; PHYSICAL SCIENCES INC ANDOVER MA
|
| This paper discusses results of a program to develop an innovative solar thermal propulsion system for application to orbit change and mobility for small spacecraft. In this system, solar radiation is collected by the concentrator which transfers the concentrated solar radiation to the optical waveguide cable consisting of low-loss optical fibers. The optical waveguide cable transmits the high intensity solar radiation to the thermal receiver for efficient, high performance thrust ... |
|
| Horizontal Integration based upon Decentralized Data Fusion (DDF), NetCentric Architecture (NCA) , and Analysis Collaboration Tools (ACT) |
JUN 2005 |
28 pages |
| Authors:
Sheldon B. Gardner; NAVAL RESEARCH LAB WASHINGTON DC
|
| The major focus in the joint-services area today is on Horizontal Integration (HI) rapidly fusing and exploiting the data from different collection systems to speed the flow of correlated intelligence to war fighters, both for situational awareness and targeting. In this paper we discuss several technologies potentially useful in HI. They are Decentralized Data Fusion (DDF), NetCentric Architecture (NCA), and Analysis Collaboration Tools (ACT). DDF, NCA, and ACT could provide ... |
|
| Reactive Hyperbranched Polymers as Toughening Processing Aids for Composite Matrices |
09 MAY 2005 |
11 pages |
| Authors:
Patrick T. Mather; CONNECTICUT UNIV STORRS DEPT OF POLYMER PROGRAM AND CHEMICAL ENGINEERING
|
| The overall objective of this proposal is to develop and study for transition new low viscosity thermoset additives - hyperbranched polymers (HBPs) - for use in composites needed for emerging space-based Air Force applications. Specifically, we are studying and developing hyperbranched polymers for use as a new low-viscosity thermoset/thermoplastic additives, which have enormouos applications in rigid spacecraft structures. The particular projects included: (i) Modification of high performance thermoplastics by non-reactive ... |
|
| Proceedings of the High Performance Embedded Computing (HPEC) Workshop (8th) Held in Lexington, MA on 28-30 September 2004. Volume I (CD-ROM) |
02 MAR 2005 |
1 pages |
| Authors:
Jeremy Kepner; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| ELECTRONIC FILE CHARACTERISTICS: 166 files; Adobe Acrobat (.PDF). PHYSICAL DESCRIPTION: 1 CD-ROM; 4 3/4 in.; 107 MB. SYSTEMS DETAIL NOTE: Adobe Acrobat Reader is included on disc. ABSTRACT: The High-Performance Embedded Computing (HPEC) technical committee announced the eighth annual HPEC Workshop held in September 2004 at MIT Lincoln Laboratory in Lexington, MA. The Workshop gave U.S. government-funded researchers from academia, industry, and government, working in this important area, an opportunity ... |
|
| Control and Synchronization of Dynamical Systems: Studies of Chemical Model Systems |
15 JAN 2005 |
12 pages |
| Authors:
Kenneth Showalter; WEST VIRGINIA UNIV RESEARCH CORP MORGANTOWN*
|
| Studies of spatiotemporal dynamical behavior in chemical systems were carried out. We have built on our expertise in addressable excitable media to develop and characterize particle-like waves that autonomously navigate and traverse obstacle-filled landscapes. Experimental investigations have been combined with theoretical and computational analyses in each project. The results of our studies are generally applicable, and our advances in designing and controlling spatiotemporal dynamical systems will be beneficial to the ... |
|
| Hypervelocity Impact Analysis of International Space Station Whipple and Enhanced Stuffed Whipple Shields |
DEC 2004 |
299 pages |
| Authors:
Michael E. Kalinski; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The International Space Station (ISS) must be able to withstand the hypervelocity impacts of micrometeoroids and orbital debris that strike its many surfaces. In order to design and implement shielding which will prevent hull penetration or other operational losses, NASA must first model the orbital debris and micrometeoroid environment. Based upon this environment, special multi-stage shields called Whipple and Enhanced Stuffed Whipple Shields are developed and implemented to protect the ... |
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| RF Polymer Phased Array Demonstration Project |
22 NOV 2004 |
70 pages |
| Authors:
H. Fetterman; W. Steier; L. Dalton; R. Chen; C. Cox; PACIFIC WAVE INDUSTRIES INC LOS ANGELESCA
|
| This BMDO demo project was to demonstrate and to evaluate the latest generation of polymer modulators and devices for optical control of phased array radar antennas. Two commercial companies and three universities participated in this effort. Two versions of new phased array antenna designs were demonstrated in Texas on Sept 9, 2004. All of the objectives of the contract were achieved and summarized in this final report. The program involved ... |
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| Multimodality Image Fusion for 3-D Model Building with Applications |
02 NOV 2004 |
13 pages |
| Authors:
Aly A. Farag; LOUISVILLE UNIV KY COMPUTER VISION ANDIMAGE PROCESSING LAB
|
| In this investigation, the authors propose a methodology for 3-D model building through the fusion of multimodality data provided from space- borne and/or air-borne sensors. A 3-D model of a target area can be built using different data types (e.g., Landsat MSS data, AVIRIS hyperspectral data, range and/or elevation (DEM) data). Data fusion and integration can be performed either at the data level or at the decision level. Multispectral and ... |
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SPACE BASED
