• DESIGN AND REALIZATION OF DELAY MAPPING RECEIVER BASED ON GPS FOR SEA SURFACE WIND MEASUREMENT

      Ronglei, Hu; Dongkai, Yang; Qishan, Zhang; Yiqiang, Zhang; Beihang University (International Foundation for Telemetering, 2005-10)
      The Delay Mapping Receiver (DMR) is used for receiving and processing the reflected GPS signal to get the information of sea surface wind by recording and matching the data with the theoretical model. The hardware architecture and software design are described in detail in this paper. The test results at near sea of Tianjin of China are provided, which prove that the design of DMR is successful and the collected data are useful for the sea surface wind measurement.
    • THE DESIGN OF A 21st CENTURY TELEMTRY SYSTEM WITH SOQPSK MODULATION AND INTEGRATED CONTROL

      Wegener, John A.; Roche, Michael C.; The Boeing Company (International Foundation for Telemetering, 2005-10)
      This paper describes a telemetry system developed for the EA-18G Flight Test program. The program requires transmission of a number of data streams, in IRIG-106 Chapter 4 PCM, Chapter 8 Mux-All 1553, Ethernet, and Fibre Channel formats. The initial requested data rate was in excess of 30 Mbits/sec. The telemetry system must operate at a range up to about 120 miles, at several test ranges, and with several different aircraft maneuvering configurations. To achieve these requirements, the Flight Test Instrumentation group at Boeing Integrated Defense Systems in Saint Louis, developed a telemetry system in conjunction with industry partners and test range customers. The system transmits two telemetry streams with a total aggregate rate on the order of 20 Mbits/sec. Each telemetry stream consists of up to four PCM streams, combined in a Teletronics Technology Corporation (TTC) Miniature Adaptable Real-Time Multiplexer Unit (MARM) data combiner. It uses Nova Engineering multi-mode transmitters capable of transmitting PCM-FM or Shaped Offset Quadrature Phase Shift Keying (SOQPSK). The transmitter also provides Turbo-Product Code (TPC) Forward Error Correction (FEC) to enhance range and improve link performance. Data collection units purchased from outside vendors or developed by Saint Louis Flight Test Instrumentation, translate Ethernet and Fibre Channel information into traditional PCM streams. A Boeing Flight Test Instrumentation developed control system provides flexible selection of streams to be combined into each telemetry stream, and functional control of antenna selection and transmitter operation.
    • DESIGN OF A HIGH DYNAMIC GPS RECEIVER

      Bochuan, Zhang; Yanhong, Kou; Qishan, Zhang; Qing, Chang; Beihang University (International Foundation for Telemetering, 2005-10)
      High dynamic and multi-channel digital GPS receiver can handle the signals with high dynamic range, low S/N ratio and refresh data quickly. A hardware design of high dynamic GPS digital receiver is given. Based on analysis of the effect that high dynamic movement makes on the receiving signals, a scheme of fast-acquisition high dynamic GPS receiver is presented. Exact reckoning of the orbit parameters and the satellite clock parameters are integrated with appropriate algorithms. A DDLL is used to precisely estimate the C/A code delay, a CPAFC loop and a Costas loop to precisely estimate the carrier frequency and phase. The DDLL is assisted with carrier phase. The experimental results show that the receiver meets the design request.
    • DESIGN OF A NEW WEBGIS SYSTEM BASED ON XML

      Zhenhua, Yu; Yanhong, Kou; Qishan, Zhang; BeiHang University (International Foundation for Telemetering, 2005-10)
      With the development of Internet and the urgent need for GIS (Geographic Information System), XML (eXtensible Markup Language) provides a powerful new way for new web application. This paper makes a research on the application of SVG based on XML in the WebGIS (World Wide Web Geographical Information System). In this paper, the characteristics of XML are illuminated in short; the application of XML in WebGIS is discussed and the features of SVG and its usage with XML are presented; a design of SVG based on XML in the WebGIS system is given.
    • DESIGN OF A SOFTWARE RADIO GPS RECEIVER

      Zhengxuan, Zhang; Yanhong, Kou; Qishan, Zhang; Beihang University (International Foundation for Telemetering, 2005-10)
      The GPS receiver based on software radio technology is a kind of general purpose GPS signal processing platform which makes use of advanced design ideas and advanced design tools nowadays. We used FPGA device and lots of necessary peripherals such as DSP and PCI controller in our design to promote flexibility and practicability effectively. Various fast acquisition means and accurate tracking algorithms could be realized, improved and validated on this platform, besides basic GPS receiver function.
    • Detection and Isolation of Instrumentation Failures Applied to GPS and Inertial Navigation

      Williamson, Walton R.; Speyer, Jason L.; Jones, Charles H.; SySense Incorporated; Edwards Air Force Base (International Foundation for Telemetering, 2005-10)
      During flight tests and during post-processing of flight data, a need exists to validate that all sensors are working properly and that data is valid after experimentation. Analytic redundancy methods enable data validation using multiple, dissimilar instruments processed through the vehicle dynamic system model. A design methodology is presented through which the designer chooses the instrumentation for flight test using output separability of the failure modes as the design metric for measuring system integrity. An example is presented using an aircraft navigation system.
    • DEVELOPING INTERNAL AND EXTERNAL TRANSLATORS FOR DATA DISPLAY SYSTEMS

      Fernandes, Ronald; Graul, Michael; Hamilton, John; Meric, Burak; Jones, Charles H.; Knowledge Based Systems, Inc; Edwards Air Force Base (International Foundation for Telemetering, 2005-10)
      The focus of this paper is to describe a unified methodology for developing both internal and external data display translators between an Instrumentation Support System (ISS) format and Data Display Markup Language (DDML), a neutral language for describing data displays. The methodology includes aspects common to both ISSs that have a well documented text-based save format and those that do not, as well as aspects that are unique to each type. We will also describe the means by which an external translator can be integrated into a translator framework. Finally, we will describe how an internal translator can be integrated directly into the ISS.
    • DEVELOPMENT OF GENERIC GROUND SYSTEMS BY THE USE OF A STANDARD MODELING METHOD

      Yamada, Takahiro; Institute of Space and Astronautical Science (International Foundation for Telemetering, 2005-10)
      This paper presents an approach to development of generic ground systems to be used for spacecraft testing and operations. This method makes use of a standard modeling method, which enables virtualization of spacecraft. By virtualizing spacecraft, development of generic systems that are applicable to different spacecraft becomes possible even if spacecraft themselves are not standardized. This is because systems can utilize (1) a standard database that can store information on any virtual spacecraft and (2) standard software tools that can be used for any virtual spacecraft. This paper explains the concept of virtualization of spacecraft, introduces the standard model used for virtualization of spacecraft, shows how to manipulate virtual spacecraft with software tools, and presents the core elements of generic ground systems.
    • DYNAMIC RF LINK ESTIMATION FOR TELEMETRY SYSTEM OF LAUNCH VEHICLE, KSLV-I

      Kim, Sung-Wan; Hwang, Soo-Sul; Lee, Jae-Deuk; Korea Aerospace Research Institute (International Foundation for Telemetering, 2005-10)
      This paper presents the dynamic RF link estimation result for telemetry system of KSLV (Korea Space Launch Vehicle)-I. In particular, it utilizes the parameters of the instantaneous vehicle antenna gain pattern in three dimensions, the improvement by polarization diversity combiner at the ground receiver, and the free space propagation loss. The structural transformation and discontinuity of ground plane after the separation events of nose fairing, stage, and spacecraft, are also included in this analysis. As a consequence, the prediction of link variation has been performed in accordance with ARDP (Antenna Radiation Distribution Plot) and look angle trace of vehicle. In addition, the optimum position of onboard antennas has been investigated to provide better RF link margin in the nominal trajectory.
    • EFTS RECEIVER WITH IMPROVED PERFORMANCE

      Rice, Michael; Wardle, Mason; Brigham Young University (International Foundation for Telemetering, 2005-10)
      The PAM representation was used to formulate a reduced-complexity detector for the Enhanced Flight Termination System (EFTS) whose performance is 5.6 dB better than limiter-discriminator detection when no phase noise is present and 3.4 dB better in the presence of expected phase noise in EFTS.
    • EXPERIMENTAL RESULTS FOR SPACE-TIME CODING USING ARTM TIER-1 MODULATION

      Nelson, Tom; Rice, Michael; Jensen, Michael; Brigham Young University (International Foundation for Telemetering, 2005-10)
      When using two antennas to transmit telemetry from an airborne platform, self interference results when both transmit antennae are visible to the receive antenna. This self interference can lead to link outages and severe distortion, especially as data rates increase above 5 Mbits/sec. Space-time coding can be used to provide transmit diversity to overcome this self interference problem. This paper describes the results of experiments (conducted at Edwards Air Force Base, California, USA) using FQPSK-JR waveforms coded with ARTM Tier-1 Space-Time Block Code.
    • A FLEXIBLE DATA ACQUISITION, CONTROL AND TELEMETRY SYSTEM FOR EXPERIMENTAL PAYLOADS

      Wilkins, Bryce; Erwin, Daniel A.; University of Southern California (International Foundation for Telemetering, 2005-10)
      Experimental science payloads vary greatly in design for the purpose of performing specialized tasks. As such, their supporting control, data acquisition and telemetry subsystems are often expensive custom designed units with specific abilities, thus limiting reuse. This paper presents a payload control, data acquisition and telemetry system capable of providing a range of functionality to science payloads as a consequence of its accommodating architecture, programmability, and physical modular design. Details of the system and its capabilities are presented followed by an actual configuration of the system as the backbone of a micro-electro-mechanical-systems technology demonstration payload designed for suborbital flight.
    • FLEXIBLE NETWORK TRANSCEIVER NEXT GENERATION TELEMETRY NETWORKING

      Brown, K. D.; Klimek, John; NNSA; JHU-APL (International Foundation for Telemetering, 2005-10)
      This paper describes the Flexible Telemetry Transceiver (FNT)-a modular, scalable, standards-based, software configurable, microwave wireless telemetry network transceiver. The FNT enables flexible, high-rate, long-range, duplex, network services across multipoint to multipoint wireless channel.
    • FLIGHT TEST INSTRUMENTATION FOR THE ADVANCED HAWKEYE LOADS RISK REDUCTION PROJECT

      Bedgar, Kenda J.; Cullison, Anthony J.; Naval Air Warfare Center Aircraft Division (International Foundation for Telemetering, 2005-10)
      This paper is about the installation of the instrumentation system and the strain gages on an E-2C Hawkeye for the Advanced Hawkeye Loads Risk Reduction project. Background information on why this project came about will be given. Explanations on why the existing instrumentation system was modified to the current system will be presented. Anthony Cullison (co-author of this paper) will explain the installation of the strain gages.
    • FLIGHT TESTS OPTIMIZATION BY SATCOM BASED TELEMETRY LINK

      Rodrigues, Tiago Giglio; Góes, Luis Carlos Sandoval; Leite, Nelson Paiva Oliveira; Marins, Carlos Nazareth Motta; Instituto Tecnológico de Aeronáutica; Instituto de Aeronáutica e Espaço; Instituto Nacional de Telecomunicações (International Foundation for Telemetering, 2005-10)
      The terrestrial microwave telemetry links show limitation due their inherent features concerning bandwidth availability, frequency allocation and range. Also it supports only one aircraft per test and the data acquisition capacity can be enhanced. Following the flight tests trends, it proposes a telemetry link based on satellite communications deployed by off the shelf equipments allowing advantages as bandwidth availability, multiple aircrafts telemetry and almost global range into the reliability standards. By simple equations and typical flight tests data it demonstrates the feasibility of the telemetry system proposed for time and costs reduction to optimize flight tests programs.
    • HELICOPTER BORNE TELEMETRY DATA ACQUISITION SYSTEM FOR DOWN RANGE APPLICATIONS

      Varaprasad, K. S.; Murthy, K. S. R.; Defense Research & Development Laboratory (International Foundation for Telemetering, 2005-10)
      The terminal phase telemetry data acquisition has always been a challenging task especially for long and medium range test launches. The task becomes more complicated if the article under test describes a very low altitude cruise terminal phase trajectory. Generally, for long and medium range missions test fired into sea the terminal phase data is acquired by deploying instrumented ships in the vicinity of impact point but beyond the safety corridor. But for long range missions with low altitude cruise terminal phase trajectory and wide safety corridor this conventional approach will not work out because of limitation of LOS from the ship platforms. Hence, for such applications an air borne telemetry receiving system is also to be added to the down range instrumentation network. This paper describes a typical and cost effective air borne system realized utilizing the Commercial Off The Shelf (COTS) products and technology. This paper also addresses as to how the signal scattering problems are tackled in the design implementation.
    • A HIGHLY INTEGRATED TELEMETRY SYSTEM FOR THE EXCALIBUR PROJECTILE

      Oder, Stephen; Dearstine, Christina; Muir, John; Semuskie, Stephen; Fratta, Ralph; DiCristina, Stephen; M/A-COM, Inc.; Raytheon Missile Systems; U.S. Army Research Development Engineering Center (International Foundation for Telemetering, 2005-10)
      A miniature 1 Watt Tactical Telemetry Module (TTM) has been developed for the Excalibur projectile program. The TTM incorporates a multi-channel PCM encoder, lower S-band transmitter, and power regulation onto a single printed wiring board (PWB). The PCM encoder is designed for eight (8) analog inputs, four (4) discrete inputs, and one (1) synchronous RS-422 serial interface, with a total data rate of 1 Mbps. The module incorporates a digitally programmable, phase-locked FM S-band transmitter. The transmitter utilizes M/A-COM’s new dual port VCO and a high efficiency 2 W power amplifier MMIC. Additionally, switching power regulation circuits were implemented within the module to provide maximum operating efficiency. This paper reviews the environmental requirements of Excalibur, the design of the Excalibur TTM, and presents electrical and air-gun test data.
    • HUMAN AND WORKFLOW ISSUES WITH SMART SENSOR NETWORKS

      Reiter, Mac; Jones, Charles H.; Nomadics, Inc.; Edwards Air Force Base (International Foundation for Telemetering, 2005-10)
      This paper presents methods of using standard PDAs, smart sensors, XML-based network and user interface descriptions, and graphical sensor network management to provide an installationto- use workflow. Techniques discussed will include: methods of providing additional capabilities to PDAs, methods of automatically constructing user interfaces based on constraints and requirements from both the sensor descriptions and the PDA capabilities description, and methods of providing more natural selection of sensors for test setup.
    • HYPER-X (X-43A) FLIGHT TEST RANGE OPERATIONS OVERVIEW

      Lux-Baumann, Jessica; Burkes, Darryl A.; National Aeronautics and Space Administration (International Foundation for Telemetering, 2005-10)
      The Hyper-X program flew X-43A research vehicles to hypersonic speeds over the Pacific Ocean in March and November 2004 from the Western Aeronautical Test Range, NASA Dryden Flight Research Center, Edwards, California. The program required multiple telemetry ground stations to provide continuous coverage of the captive carry, launch, boost, experiment, and descent phases of these missions. An overview is provided of vehicle telemetry and distributed assets that supported telemetry acquisition, best-source selection, radar tracking, video tracking, flight termination systems, and voice communications. Real-time data display and processing are discussed, and postflight analysis and comparison of data acquired are presented.
    • AN IMPLEMENTATION OF A COMPLETE XML SYSTEM FOR TELEMETRY SYSTEM CONFIGURATION

      Portnoy, Michael; Teletronics Technology Corporation (International Foundation for Telemetering, 2005-10)
      Creating a generic, multi-vendor data exchange system for transmitting telemetry configurations between various systems is a daunting task. To date many different systems have been proposed including relational databases (RDBMS), TMATS, and several different XML schemas. Although many of these systems have been implemented, a complete, flexible solution has not been developed. This paper describes an implementation that is currently in use for exporting and importing a complete telemetry system via XML. Using this system, an engineer can import an entire telemetry configuration, a partial telemetry configuration, or even just a single measurement (parameter). As a result, the gap between user database systems and the airborne instrumentation vendor’s configuration software (IVCS) is seamlessly bridged. This provides many benefits including: the ability to rapidly change configurations, data entry error avoidance, version control, the protection of sensitive information, and configuration reusability. This system allows for the configuration of all aspects of the telemetry setup including data acquisition hardware, transmitters, ground stations, and recorders. In addition, the recorder settings and the definition of the data that are to be recorded are coupled and linked to the rest of the telemetry configuration, which facilitates future data recovery.