| Laser Dot Projection Photogrammetry and Force Balance Measurement Techniques for Flapping Wing Micro Air Vehicles |
Mar-2008 |
135 pages |
| Authors:
David H Curtis; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
 | The purpose of this research was to develop testing methods capable of analyzing the performance of a miniature flapping-wing mechanism that can later be adapted to a flapping wing micro air vehicle (MAV). A previously designed and built flapping only mechanism was used for testing, while a previously designed flapping and pitch mechanism was fabricated utilizing an Objet Eden 500V 3-dimensional printer and its operation demonstrated. The flapping mechanism was ... |
|
| Limited Evaluation of an 802.11b Air-to-Ground Wireless Datalink (Project "HAVE HALO") |
JUN 2006 |
69 pages |
| Authors:
Michael J. Dooley; Chris J. Spinelli; Laura M. Durham; George N. Schwartz; Troy C. Welker; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
|
| This report presents the results of the limited evaluation of an 802.11b wireless air-to-ground datalink between a ground station and a C-12C aircraft. Testing occurred between 10 April and 2 May 2006. This test program demonstrated the 802.11b wireless datalink reception range when transmitting at 4 Watts effective isotropic radiated power. The test team also demonstrated the utility of high resolution imagery and streaming video transmitted across the datalink. The ... |
|
| Providing Full Connectivity in Large Ad-Hoc Networks by Dynamic Placement of Aerial Platforms |
2004 |
22 pages |
| Authors:
Karthikeyan Chadrashekar; Majid R. Dekhordi; John S. Baras; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
|
| In this paper, the authors address the problem of providing full connectivity to disconnected ground MANET nodes by dynamically placing unmanned aerial vehicles (UAVs) to act as relay nodes. They provide a heuristic algorithm to find the minimal number of such aerial vehicles required to provide full connectivity, and to find the corresponding locations for these aerial platforms (UAVs). They also track the movement of the ground nodes and update ... |
|
| A System to Compare and Evaluate the Quality of Precise Frequency and Timing Systems |
01-Jan-2002 |
7 pages |
| Authors:
Werner R Lange; LANGE ELECTRONIC GMBH GERNLINDEN (GERMANY)
|
| Larger scientific and commercial sites like military test ranges or satellite ground stations very often use several sets of independently operating PTFS (Precise Timing & Frequency Systems). Very often these systems are separated by several hundreds of meters and synchronized to different sources that make it difficult to compare the quality in terms of on-time accuracy and frequency precision between these independent systems. This paper describes a "tool" to measure ... |
|
| A Feasible Approach for Implementing Greater Levels of Satellite Autonomy |
2002 |
7 pages |
| Authors:
Steve Lindsay; Paul Zetocha; AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE
|
| In this paper, we propose a means for achieving increasingly autonomous satellite operations. We begin with a brief discussion of the current state-of-the-art in satellite ground operations and flight software, as well as the real and perceived technical and political obstacles to increasing the levels of autonomy on today's satellites. We then present a list of system requirements that address these hindrances and include the artificial intelligence (AI) technologies with ... |
|
| Near-Optimal Antenna Placement Using Genetic Search |
2000 |
12 pages |
| Authors:
Lara S. Crawford; Victor H. Cheng; Rich Burns; Shiang Liu; OPTIMAL SYNTHESIS INC LOS ALTOS CA
|
| The optimal placement of ground stations and antennas in the Air Force Satellite Control Network (AFSCN) to support the operation of a large set of satellites is a very difficult problem involving many complex, interacting constraints and requirements. This paper explores the application of genetic search techniques to antenna-placement optimization. The performance index used in the genetic search optimization was based on a candidate configuration's cost. Requirements on the number ... |
|
| What are the Best Architectural and Doctrinal Structures for the Common Ground Station in Order to Provide the Best Intelligence and Targeting Support to Maneuver Brigade Commanders? A Case Study of the Common Ground Station Fielding at Maneuver Brigades |
04 JUN 1999 |
188 pages |
| Authors:
Kenneth J. Diller; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS
|
| The Army as well as the intelligence community is currently involved with designing and developing the doctrine and concepts which will take the Army into the next century. This study investigates and analyzes the doctrine and architecture of the Common Ground Station (CGS) in support of a maneuver brigade as enjoined with the ongoing implementation of the tenants of Force XXI. The research model used is based upon the maneuver ... |
|
| Iridium TTC Ground Station Number and Location Optimization |
26 OCT 1998 |
83 pages |
| Authors:
Aaron J. Masino; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
|
| The commercialization of space missions has led to the need for cost minimization in order to make these ventures commercially viable. In the past, commercial space systems have generally consisted of a single satellite in a geo-stationary orbit. Command and control of these systems required only a single ground station and cost was not an issue. However, with the crowding of the geo-stationary belt and the desire for truly global ... |
|
| Controller and Communications Middleware Survey and Evaluation |
27 AUG 1998 |
144 pages |
| Authors:
Roland Kranz; Forrest Harrell; AEROJET ENGINEERING CORP AZUSA CA
|
| There is a need for a standard core architecture to reduce the costs of developing and maintaining ground control systems for different satellites. This report documents a survey and evaluation of next generation computing technology trends relevant to the need. In addition to the advent of the Internet, there are two Important on-going evolutions impacting the area - the migration to distributed client-server computing and the paradigm shift to object-oriented ... |
|
| Tactical Intelligence: Accelerated Joint STARS Ground Station Acquisition Strategy is Risky |
MAY 96 |
13 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC NATIONAL SECURITY AND INTERNATIONAL A FFAIRS DIV
|
| The Army lacks an analysis justifying a need to accelerate the fielding of the CGS system and can save millions of dollars by minimizing production In its second year of CGS production. Furthermore, there are inherent risks in procuring systems prior to their successful completion of an OT&E and the benefits of the Army's acquisition strategy do not clearly outweigh the associated risks. We therefore recommend that the Secretary of ... |
|
| Remote Sensing and Remote Control Activities in Europe and America: Part 2--Remote Sensing Ground Stations in Europe |
08 APR 96 |
16 pages |
| Authors:
Shi Changjie; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| Development tasks and products of remote sensing ground stations in Europe are represented by the In-Sec Corporation and the Schlumberger Industries Corporation. The article presents the main products of these two corporations. ANNOTATION: Remote Sensing and Remote Control Activities in Europe and America: Part 2--Remote Sensing Ground Stations in Europe --Translation. |
|
| Environmental Assessment for the Space Based Infrared System (SBIRS) mission Control Station for Defense Support Program Consolidation |
APR 1996 |
114 pages |
| Authors:
Anthony C. Davis; Josephine Jarrell; Donald L. Koehler; J. D. Latimer; Craig McColloch; PARSONS ENGINEERING SCIENCE INC AUSTIN TX
|
| A number of different missile warning, defense, and battlespace characterization systems are currently in use by the Department of Defense (DoD) and other national users. These systems include the Defense Support Program (DSP), Large Processing Station (LPS), Attack and Launch Early Reporting to Theater (ALERT), Tactical Detection and Reporting (TACDAR), and Joint Tactical Ground Station (JTAGS). The DoD proposes to integrate and ultimately replace these systems with the Space Based ... |
|
| Design and Implementation of the PANSAT Software Groundstation |
SEP 95 |
155 pages |
| Authors:
Jens Bartschat; NAVAL POSTGRADUATE SCHOOL MONTEREY CA SPACE SYSTEMS ACADEMIC GROUP
|
| The PANSAT Software Groundstation enables a user to command and control PANSAT once it is in space, provided he has an IBM-compatible and WindowsOR or Windows NTOR capable computer with a serial interface and the necessary additional hardware. Via the implemented PAN SAT Command Language (PCL), the user will be able to access all PANSAT commands, thus control it, gather telemetry data or use its mail storing capability in an ... |
|
| INMARSAT TT&C and Communications Network and the Beijing Inmarsat Station |
05 APR 95 |
18 pages |
| Authors:
Lin Rongle; NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
|
| First, this paper presents a briefing of the basic concepts of the INMARSAT TT&C and communications Network which includes the space segment and the ground segment. The Network consists of the satellite control center, the TT&C stations and the corresponding TT&C subsystems of the INMARSAT satellites. Next, this paper describes the configuration, the functions and the performance indicators of the Beijing INMARSAT TT&C station. Finally, the primary technical characteristics of ... |
|
| High Frequency (HF) Upgrade Study for the Canadian Regional Operations Control Center (ROCC) AWACS Digital Information Link (RADIL) Project |
APR 95 |
78 pages |
| Authors:
Kenneth Wickwire; MITRE CORP BEDFORD MA
|
| The Regional Operations Control Center AWACS Digital Information Link/Rapidly Deployable Integrated Command and Control System (RADIL/RADIC) system Program Office, Canadian RADIL Progam, has acquired high-frequency (HF) radio equipment for two Canadian ground stations under the RADIL Project. This equipment will allow those stations to carry out Tactical Digital Information Link (TADIL) A data transmissions assisted by MIL-STD-188-141A automatic link establishment (ALE). The MITRE Corporation has been tasked to study whether ... |
|
| Design and Analysis of a Mode B and Mode JD Satellite Earth Station |
JUN 94 |
167 pages |
| Authors:
Dennis J. Hance; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This thesis focuses on the design, integration, and analysis of an amateur radio service mode B and mode JD satellite earth station. Preliminary designs were investigated to determine the optimum configuration for the earth station. Modern digital modems, cabling structures, an 80386-based computer system, satellite tracking software, transmission and reception antennas, preamplifiers, and sophisticated performance measurement technologies were integrated into a functioning earth station. Initially, component availability and station design ... |
|
| Ground Station Module Symposium Held in Fort Monmouth, New Jersey on October 21, 1993 |
21 OCT 93 |
127 pages |
| Authors:
ARMY COMMUNICATIONS-ELECTRONICS COMMAND FORT MONMOUTH NJ
|
| On behalf of the Communications-electronics Command (CECOM) and the Training and Doctrine Command (TRADOC) System Manager for Joint Stars, I am pleased to present to you the proceedings of the Ground Station Module Symposium. The subject of the Symposium is the Common Ground Station which is an outgrowth of the Joint Stars Ground Station Module program. The objective of this Symposium is to encourage an exchange of information which will ... |
|
| Defense Support Program: Ground Station Upgrades Not Based on Validated Requirements |
21 MAY 93 |
6 pages |
| Authors:
GENERAL ACCOUNTING OFFICE WASHINGTON DC NATIONAL SECURITY AND INTERNATIONAL A FFAIRS DIV
|
| This report summarizes our review of whether planned upgrades costing up to $95 million to Defense Support Program (DSP) ground processing stations are supported by validated operational requirements. DSP is a strategic surveillance and early warning satellite system. It is premature to upgrade DSP ground stations because the Air Force has not completed validation of operational requirements as required by Department of Defense (DOD) Instruction 5000.2 and Air Force Regulation ... |
|
| A Model of Global Positioning System (GPS) Master Control Station (MCS) Operations |
15 DEC 92 |
210 pages |
| Authors:
David N. Koster; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| The United States Air Force's Navstar Global Positioning System (GPS) provides high-accuracy space-based navigation and time distribution to suitably- equipped military and civilian users. The system consists of earth-orbiting satellites and a world-wide network of ground stations. A single operational control center, the GPS Master Control Station (MCS) monitors, maintains, and commands the GPS satellite constellation. The on-going deployment of the complete satellite constellation and recent changes in the operational ... |
|
| The Method of Ratios |
JUN 1992 |
14 pages |
| Authors:
David Negron Jr.; Salvatore Alfano; Daniel D. Wright III; AIR FORCE ACADEMY COLORADO SPRINGS CO
|
| This paper presents a detailed algorithm to compute a mean visibility report between a range-restricted ground station and a space object, generated by the method of ratios. This method is based upon the limiting orbital characteristics of a space object versus a ground station, which are used to generate a visibility report from an analytical model. For this study, the visibility report is defined as the mean minutes-per-day the space ... |
|
| Accurate Delay Calibration for Two-Way Time Transfer Earth Stations |
Nov-1989 |
10 pages |
| Authors:
De; Gerrit Jong; NMI VAN SWINDEN LABORATORIUM DELFT (NETHERLANDS)
|
| The most accurate clocks are using cesium beam frequency standards as their source of accuracy. The atomic time scale TAI is built from the SI seconds after adopting the definition of its origin. As a practical time scale close to the astronomic time, UTC has been introduced, which is equal to TAI, but kept in close agreement with universal time, by additional or subtraction of leap seconds. UTC and TAI ... |
|
| Satellite Low Rate Voice Demonstration Test Plan |
DEC 88 |
18 pages |
| Authors:
Joan Grelis; FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ
|
| This test plan describes the design of the demonstration of a low data rate voice Codec communications link via satellite. The demonstration will include the use of 4.8 kbps voice Codec equipment interfaced with a mobile satellite (MSAT) communications terminal installed in the Federal Aviation Administration's (FAA's) B- 727 (N-40) aircraft and similar equipment at the COMSAT ground earth station in Southbury, Connecticut. This configuration, used in conjunction with INMARSAT ... |
|
| The Use of Chaff in Space as a Jamming Device between Ground Stations and Satellites |
DEC 88 |
183 pages |
| Authors:
Alan R. Sterns; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
|
| This study predicts the time evolution of the attenuation characteristics of a chaff cloud deployed in orbit around the earth. The study consists of three parts: applying the statistical mechanics solution of a satellite breakup model by William Heard of the Naval Research Laboratory, solving for particle density at any time after dispensing, and calculating the attenuation of an 8 GHz signal through the cloud. The study shows that significant ... |
|
| Will the USAF Need Ground-Based Air Traffic Control Radar in the Year 2000? |
APR 86 |
|
| Authors:
George L. Varn; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
|
 | Advanced technology in military aviation is developing rapidly. The Global Positioning System (GPS) and Microwave Landing System (MLS) will give the pilot precision navigation capability when fully deployed in the 1990s. The Joint Tactical Information Distribution System (JTIDS) will give the pilot the capability to display enemy and friendly aircraft in his area in his cockpit. At the same time, our mobile air traffic control (ATC) radars are aging and ... |
|
| VHF (Very High Frequency)-AM Communications Equipment Selection and Installation Practices for Helicopters |
SEP 85 |
|
| Authors:
E. H. Bolz; L. D. King; SYSTEMS CONTROL TECHNOLOGY INC WEST PALM BEACH FL
|
| This publication addresses the problems helicopter operators face when using VHF communications within typical operating environments where coverage by the network of ground stations may be deficient. This is of particular interest to IFR helicopter operators. The specific reasons why communications effectiveness can be limited in mountainous or remote regions, considering typical low helicopter operating altitudes, are reviewed. Recommendations to operators for improving the airborne VHF installation, and therefore improving ... |
|
| Standard Engineering Installation Package. Air Traffic Radio Channel Control Equipment Change 1 |
30 OCT 1981 |
|
| Authors:
ARMY COMMUNICATIONS-ELECTRONICS ENGINEERING INSTALLATION AGENCY FORT HUACHUCA AZ
|
| This report contains changes to the Standard Engineering Installation Package (SEIP) which provides information for the engineering and installation of ATRCC (Air Traffic Radio Channel Control) facilities worldwide. Information provided consists of site survey data, siting criteria, installation specifications and instructions, certification format. Information provided must be adapted to the specific ATRCC facility/location by the project engineer. |
|
| Airborne Flight Test System (AFTS) |
26 OCT 1981 |
|
| Authors:
John A. Maynard; M. Ross; MCDONNELL DOUGLAS ASTRONAUTICS CO-ST LOUIS MO
|
| The objective of the AFTS program was to demonstrate the operation of a full 1000 Mbps laser communications system transmitting from an aircraft to a ground station receiver. The system was designed around a spaceborne terminal requirements and included prototype operational components. The six years of contract activity included design of a spaceborne high data rate transmitter, adapting the space platform design to operate on a KC-135 aircraft, development and ... |
|
| Facility Design Criteria AN/GSC-39(V)1 Earth Terminal Complex Fixed Site Configuration. Addendum I. HEMP Considerations |
MAR 1981 |
|
| Authors:
Samuel A. Clark Jr.; Ronald J. Chase; James D. Penar; HARRY DIAMOND LABS ADELPHI MD
|
| This addendum provides high altitude electromagnetic pulse (HEMP) hardening design criteria for the AN/GSC-39 Earth Terminal Complex fixed site facilities. In addition to other criteria, this addendum is to be used for preparing construction plans and specifications for the earth terminal complex. These HEMP criteria are based on two reports for HEMP hardening of the AN/FSC-78 Satellite Communications Terminal. The hardening measures developed in this Addendum will enhance protection for ... |
|
| Ground Station Digital Interface System Detail. |
SEP 1980 |
|
| Authors:
U. R. Krieser; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
|
| Digital computer interface equipment has been developed to allow the recovery of digital data encoded in special format and recorded both in flight and in laboratory experiments using an analogue tape transport. Circuit techniques adopted for the interface equipment are discussed in a separate report. Complete system details required for circuit manufacture, operation and in-service maintenance are provided in the present publication. (Author) |
|
| Dual-Frequency EHF Ground-Terminal Antenna. |
03 MAR 1980 |
|
| Authors:
Michael L. Burrows; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
|
| A design is presented for an EHF ground-terminal antenna in the form of a dual-frequency 2-ft dish. The 20 GHz receive horn is at the prime focus. The 44 GHz transmit feed is a focussed array of 32 square horns at the vertex of the dish illuminating a dichroic ellipsoidal Cassegrain sub-reflector. The sub-reflector is nominally transparent at 20 GHz and nominally a perfect reflector at 44 GHz. The directive ... |
|
| Standard Engineering Installation Package. Air Traffic Radio Channel Control (ATRCC) Equipment. |
01 NOV 1979 |
|
| Authors:
ARMY COMMUNICATIONS-ELECTRONICS ENGINEERING INSTALLATION AGENCY FORT HUACHUCA AZ
|
| This Standard Engineering Installation Package (SEIP) provides information for the engineering and installation of ATRCC facilities worldwide. Information provided consists of site survey data, siting criteria, installation specifications and instructions, a bill of materials, quality assurance procedures and completion certification format. Information provided must be adapted to the specific ATRCC facility/location by the project engineer. (Author) |
|
| COMSAT Participation in ARPA Packet Satellite Program (PSP). |
OCT 1979 |
|
| Authors:
L. C. Palmer; D. Mills; S. Rothschild; COMSAT LABS CLARKSBURG MD
|
| This final report summarizes the last year of the Communication Satellite Corporation's (COMSAT's) participation in the Atlantic Packet Satellite Program (SATNET), an experimental program involving packet data transmission via a single 64 Kb/s SCPC channel in the SPADE Transponder of INTELSAT IVA (Atlantic Primary) between standard A earth stations at Etam, W.Va., Goonhilly U.K., and Tanum Sweden. A fourth, smaller (G/T = 28.5 dB/K) earth station at COMSAT Laboratories, Clarksburg, ... |
|
| Ground Stations in Satellite Communication, |
08 NOV 1978 |
|
| Authors:
Lo Tsen Yu; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
|
| Indian Creek Pumping Station, Mankato, Minnesota, Hydraulic Model Investigation. |
JUN 1978 |
|
| Authors:
Bobby P. Fletcher; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
|
| The model study was conducted to evaluate the characteristics of inflow to the original design gravity-flow section and pump sump and to develop modifications required for improving the distribution of flow to the gravity-flow section and pump intakes. The 1:10-scale model indicated the need for certain minor modifications to improve flow characteristics in the forebay and ensure satisfactory flow characteristics and pressures near the pump intakes. The major problems encountered ... |
|
| Product Assurance, Operational Quality Assurance, Satellite Systems Technical Evaluation. |
31 MAY 1977 |
|
| Authors:
ARMY COMMUNICATIONS COMMAND FORT HUACHUCA ARIZ
|
| This pamphlet contains the responsibilities and duties, and the administrative and logistical procedures governing the functions of a satellite test team. Calculation worksheets and tutorial information on test techniques and data analysis as well as equipment specifications and extracts of technical literature are included to aid in the assessment of a link and terminal. Test procedures for the radio system and pertinent audio series tests are furnished from which to ... |
|
| A Laser System for Determination of Rocket Attitude Using Two Ground Stations. |
DEC 1976 |
88 pages |
| Authors:
John E. Nydahl; Kynric M. Pell; WYOMING UNIV LARAMIE DEPT OF MECHANICAL ENGINEERING
|
| A system that can measure the attitude of a spinning rocket when coupled with a laser radar tracker was investigated. The attitude sensing system consists of at least two ground based laser transmitter/detector stations which illuminate the rocket with continuous wave lasers as it moves downrange. Pulses that are reflected from two roof type prisms onboard the spinning vehicle back to the two transmitting stations along with position data obtained ... |
|
| A Circularly Polarized Yagi Antenna System for NTS-1 and NTS-2 Ground Stations. |
SEP 1976 |
24 pages |
| Authors:
Louis D. Breetz; NAVAL RESEARCH LAB WASHINGTON D C
|
| A circularly polarized yagi antenna system for use with GPS Navigational Technology Satellites (NTS-1 and NTS-2) ground stations was designed and a model built and tested. The report describes the design philosophy and techniques used, actual constructional dimensions for the model, and calculated and measured performance characteristics. (Author) |
|
| Design Issues for Mixed Media Packet Switching Networks |
DEC 1975 |
|
| Authors:
D. D. Huynh; H. Kobayashi; F. F. Kuo; HAWAII UNIV HONOLULU
|
| In this paper we present some of the important design issues for packet switching networks with both satellite and terrestial components -- which we call mixed media packet switching networks. Satellite packet switching has considerable promise for low cost, high bandwidth data communications. However there is inherent high delay in satellite links which do not appear in ground links. Therefore a mix of the two communications media offers the advantages ... |
|
| Interaction of a Buoyant Turbulent Round Jet with a Co-Flowing Wind. |
11 NOV 1975 |
|
| Authors:
Milton M. Klein; Bruce A. Kunkel; AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MASS
|
| A broad effort is being conducted to develop an operational Warm Fog Dispersal System (WFDS) using ground-based heat sources. In order to determine the optimum heat and thrust for the combustors in the WFDS, investigations have been made of the buoyant motion in round- and plane-heated turbulent jets in co-flowing (that is, same direction) wind fields. This report describes a method of calculating the round jet case. The method can ... |
|
| A Digital Data Acquisition Interface for the SMS Direct Readout Ground Station - Concept and Preliminary Design. |
OCT 1975 |
|
| Authors:
George D. Alexander; ARMY ELECTRONICS COMMAND FORT MONMOUTH N J
|
| General specifications are generated for hardware and software that will permit retrieval, preprocessing, and storage of digital meteorological satellite imagery data that are presently available to researchers only in analogue (transparency) format. (Author) |
|
| Satellite Packet Broadcasting to Very Small Earth Stations. |
SEP 1975 |
|
| Authors:
Norman Abramson; DEFENSE COMMUNICATIONS ENGINEERING CENTER RESTON VA
|
| This report analyzes the throughput of an ALOHA channel when compared to a conventional satellite point-to-point channel of the same average power. Results show that in the limit of large numbers of small earth stations, the ALOHA throughput reaches 100% of the point-to-point capacity. (Author) |
|
| Satellite Packet Broadcasting to Very Small Earth Stations |
JUL 1975 |
|
| Authors:
Norman Abramson; HAWAII UNIV HONOLULU
|
| In this paper we analyze the thruput of an ALOHA channel when compared to that of a conventional point-to-point channel of the same average power. This analysis is of interest in the case of a satellite information system employing thousands of small earth stations. For a satellite system the fundamental limitation in the downlink is the average power available in the satellite transponder rather than the peak power. Our results ... |
|
| Synchronization Station Location Study. Summary. |
JUL 1974 |
|
| Authors:
J. M. Holt; F. D. Watson; MCDONNELL DOUGLAS ELECTRONICS CO ST CHARLES MO
|
| A technology for evaluating ground station sites on the basis of their effectiveness in disseminating time synchronization has been produced. Analytical studies have complemented the concept of computer modeling of the airspace population, then quantitatively assessing the effectiveness of various configurations and deployment of time disseminating equipments. A unique feature is the ability to evaluate the effectiveness of ground based master stations with and without aircraft hierarchal time synchronization relay. ... |
|
| Human Engineering Comparison Study of the Ground Guidance Stations of the Corporal Missile System Type II and Type III. |
JUN 1957 |
|
| Authors:
Alfred P. Van Huyck; Theodore W. Miller; Bruno L. Sova; CHICAGO UNIV ILL HUMAN DYNAMICS LAB
|
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Reports by Keyword(s)
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