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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

USING COMMERCIAL-OFF-THE-SHELF (COTS) PRODUCTS IN THE DESIGN OF MISSILE FLIGHT-QUALIFIED HARDWARE

Kujiraoka, Scott R. 10 1900 (has links)
International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / During these times of acquisition reform in the federal government, various missile systems are being forced into using Commercial-off-the-Shelf (COTS) products in the design of their subsystems. However one problem that this presents is the lack of configuration management. There is a concern that the manufacturer will modify the product without informing the end user. This may have a severe effect on the performance of an already flight qualified subsystem. An example of how one program is dealing with this issue will be discussed.
92

LOW-ELEVATION TRACKING TECHNOLOGY FOR TELEMETRY EQUIPMENT

Xueping, Zhu 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / This paper analyzes the multi-path effects on telemetry equipment when it tracks the low-elevation flying target. Based on bias-axis mono-pulse technique, real time attenuation memory recursive Least-Squares Estimate as well as synthetic application of multiple source data, a comprehensive tracking method is proposed to eliminate the antenna shaking and reduce angle error caused by the multi-path effects. The method has been verified by field test. And the goal of smooth tracking of the low elevation target is eventually reached.
93

Optimizing Bandwidth Utilization in Packet Based Telemetry Systems

Kalibjian, Jeffrey R. 11 1900 (has links)
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / A consistent theme in spacecraft telemetry system design is the desire to obtain maximum bandwidth utilization given a fixed transmission capability (usually due to cost/weight criteria). Extensions to basic packetization telemetry architectures are discussed which can facilitate a reduction in the amount of actual data telemetered, without loss of data quality. Central to the extensions are the establishment of an "intelligent" telemetry process, which can evaluate pending data to be telemetered, and act to compress, discard, or re-formulate data before actual transmission to ground stations.
94

Recovery of Telemetered Data by Vertical Merging Algorithms

Hoag, Joseph E., Kalibjian, Jeffrey R., Shih, Dwight, Toy, Edward J. 10 1900 (has links)
International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / A long standing problem in telemetry applications is the recovery of data which has been damaged during downlink. Data recovery can be significantly improved by telemetering information in a packet format which employs redundant mechanisms for data encapsulation. A simple statistical algorithm (known as a "merge" algorithm) can be run on the captured data to derive a "least damaged" data set.
95

AN EXTENSION TO THE CCSDS PACKET TELEMETRY TO SUPPORT DATA TRANSFER WITH VARIOUS SERVICE REQUIREMENTS

Yamada, Takahiro 10 1900 (has links)
International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A spacecraft complying with the CCSDS Packet Telemetry standard generates telemetry data as a stream of packets. Generally, each packet has different requirements for data transfer characteristics (such as delay and reliability). These requirements are called Quality of Service (QoS) requirements. This paper proposes an extension to the CCSDS Packet Telemetry standard to specify QoS requirements of each packet. The method proposed in this paper is to associate with each packet (1) a level of delay tolerance and (2) a level of loss tolerance. This paper shows how packets should be handled based on this QoS information, and demonstrates that most of the QoS requirements for telemetry data transfer can be met by using this information. This paper also addresses some topics for future investigations.
96

MULTIPLEXER / DEMULTIPLEXER IMPLEMENTATION USING A CCSDS FORMAT

Grebe, David L. 10 1900 (has links)
International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A multiplexer / demultiplexer design suitable to a wide range of input data types and link formats is presented. Based on the Consultative Committee on Space Data Systems (CCSDS) recommendations for Packet Telemetry, the design translates the prescribed layered architecture into a modular, layered hardware implementation. The design approach minimizes hardware yielding increased reliability and decreased product cost while retaining a high degree of flexibility. This implementation can be applied to flight data acquisition (direct transmission to the ground or recorded), ground data collection (including multi-stream record systems) and inter-range communications. The use of an internationally recognized standard promotes inter-service interoperability and facilitates data handling/routing throughout a wide community.
97

HARDENED SUBMINIATURE TELEMETRY AND SENSOR SYSTEM

Faulstich, Raymond J., Burke, Lawrence W. Jr, D’Amico, William P. 10 1900 (has links)
International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / The Army development and test community must demonstrate the functionality and reliability of gun-launched projectiles and munitions systems, especially newer smart munitions. The best method to satisfy this requirement is to combine existing optical and tracking systems data with internal data measured with on-board instrumentation (i.e. spin, pitch, and yaw measurements for standard items and terminal sensor, signal processor, and guidance/navigation system monitoring for smart munitions). Acquisition of internal data is usually limited by available space, harsh launch environments, and high associated costs. A technology development and demonstration effort is underway to provide a new generation of products for use in this high-g arena. This paper describes the goals, objectives, and progress of the Hardened Subminiature Telemetry and Sensor System (HSTSS) program.
98

A Program to Display Big Data

Chantaworakunakorn, Piyarat, Munoz, Michael 10 1900 (has links)
ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NV / This paper describes a new way to look at telemetry data. Northern Arizona University (NAU) students are researching a new approach to apply virtual reality (VR) to evaluate data from a collection of stored signals. Each signal will have limits attached which we will use to view the parts of the waveform which contain abnormalities. A program to illustrate the technique is being developed by NAU students. Initially, we were working with Vizard 5, using the Python language. However, there is another program, Unity, which will perhaps be more useful for the application we wish to achieve. Additionally, we are examining a technique to accurately access the telemetry data collected. The amount of telemetry data collected has increased over the years resulting in difficulties in identifying the relevant information. We are searching for a better approach to store and access big data and will demonstrate this approach by utilizing Oculus Rift and Microsoft Kinect.
99

A STATUS REPORT OF THE JOINT ADVANCED MISSILE INSTRUMENTATION PROJECT JAMI SYSTEM INTEGRATION

Powell, Dave 10 1900 (has links)
ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Joint Advanced Missile Instrumentation (JAMI), a Central Test and Evaluation Investment Program (CTEIP) initiative, is developing advanced telemetry system components that can be used in an integrated instrumentation package for tri-service small missile test and training applications. JAMI demonstrated significant improvement in the performance of low-cost Global Positioning System (GPS) based Time-Space-Position Information (TSPI) tracking hardware that can be used for world-wide test and training. Acquisition times of less than 3 seconds from a cold start and tracking dynamics to over 60Gs were demonstrated. The final production designs and flight testing results are discussed along with comparisons to the initial project requirements. A discussion of integration initiatives and implementation issues are included.
100

Feasibility of a Bluetooth Based Structural Health Monitoring Telemetry System

Uchil, Vilas, Kosbar, Kurt 10 1900 (has links)
International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The Bluetooth standard is intended to provide short-range (10-100 meter) wireless connectivity between mobile and desktop devices. It was developed as a replacement for short cables, and has the ability to form ad-hoc networks. This paper explores the feasibility of using Bluetooth devices for structural health monitoring telemetry applications. We describe the configuration of a small ad-hoc network using Bluetooth modules and micro-controllers to simulate a telemetry application and thus evaluate the general framework of distributed, reliable, and secure, wireless communications required for telemetry.

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