• C-17 TEST DATA ARCHIVE EFFORT

      Henderson, Landon; Perez, Miguel (Mike); Edwards Air Force Base (International Foundation for Telemetering, 2005-10)
      During the era 2000-2002, the U.S. Air Force C-17 Follow-on Flight Test Program (FOFTP) transitioned to total bulk data collection employing the Veridian OMEGA™ Intelligent Multiplexer (IMUX) and associated Series 3000 Telemetry Processor. Advanced planning for the data management was deficient; engineers and analysts were overwhelmed by the actual quantity of instrumentation data collected, at a rate of 2- to 3-gigabytes per flight test hour. In fiscal year (FY) 2003, the Test Director initiated comprehensive planning for management of the C-17 data elements. Including the bulk instrumentation data collected, this plan also addressed the management of programmatic information and correlation from the test definition program phase through the archiving of test reporting Information. The envisioned end-state of the C-17 test data archive effort, also referred to as the C-17 Enterprise Test Data Management System (ETDMS), seeks to provide the C-17 Test Team with cradle-to-grave data management at a level unprecedented in the flight test community and is described herein. Once funding was received, the C-17 Integrated Product Team (IPT) has aggressively moved into deploying the C-17 ETDMS at the Air Force Flight Test Center (AFFTC) located at Edwards Air Force Base, California. Five modest objectives were set for the effort at initiation; these were: 􀂉 Objective 1: Establish C-17 Technical Library; Complete Deployment of LiveLink Distribution System 􀂉 Objective 2: Improve Data Analysis (Telemetry) Toolset and Products; Train Users 􀂉 Objective 3: Modernize Legacy Databases/Applications (Measurands, Calibrations, Generation of the Test Parameter Requirements [TPR] Document) 􀂉 Objective 4: Fix the Test Planning and Test Point Tracking User Interface 􀂉 Objective 5: Implement the Approved ETDMS Framework The C-17 ETDMS will link the many geographically separated users of C-17 test results in near real-time. Thus, providing the program decision-makers with the information required to support the current worldwide combat operations tempo by joint force elements as exhibited during the recent deployments and sustainment of operations in the Southwest Asian AOR. Collaterally, the C-17 ETDMS will support the efforts of our co-located NASA-Dryden colleagues seeking to improve the abilities of our National Airspace System (NAS) to support industry initiatives such as aircraft health monitoring and “call-ahead” maintenance planning. Currently ahead of schedule and within projected costs boundaries, the C-17 ETDMS will provide government off-the-shelf (GOTS)/commercial off-the-shelf (COTS) solutions to the C- 17 test community during FY 2005.
    • AFRL/JWSD-1 DATA ARCHIVAL SYSTEM

      Self, Lance; Kirtland Air Force Base (International Foundation for Telemetering, 2005-10)
      Properly managing the volumes of data that are sent from satellites to the ground is becoming more important for a number of reasons. As more satellites are launched more data becomes available and there is a wealth of information contained within the data sets; information regarding the performance of the satellite subsystems, sensors, efficiency of autonomous software, and the accuracy of models and simulations to name a few. Proper storage and archival methods help ensure these data sets are available to scientists and engineers to discover previously unknown and “never before thought of” relationships between systems or subsystems. The most obvious “first step” in this process is to preserve the data for work that may lead towards new discovery and future advances. AFRL is committed to preserving these data sets for these and other stated reasons. This paper describes one ongoing effort related to the Joint Warfighting Space Demonstration 1 (JWSD-1) (aka RoadRunner) satellite program that archives all the data sent to the ground and makes that data available via the Internet to concerned groups of users.
    • SHF MULTIPATH CHANNEL MODELING RESULTS

      Rice, Michael; Lei, Qiang; Brigham Young University (International Foundation for Telemetering, 2005-10)
      This paper presents the results of land-based SHF channel modeling experiments. Channel modeling data were collected at Edwards AFB, California at S-Band, X-Band and Ku-band. Frequency domain analysis techniques were used to evaluate candidate channel models. A graphical user interface (GUI) was developed to search for the optimum channel parameters. The model parameters corresponding to different frequencies were compared for multipath events captured at approximately the same locations. A general trend was observed where the magnitude of the first multipath reflection decreased as frequency increased and the delay remained relatively unchanged.
    • A METHOD FOR FINDING BETTER SPACE-TIME CODES FOR MIMO CHANNELS

      Panagos, Adam G.; Kosbar, Kurt; University of Missouri (International Foundation for Telemetering, 2005-10)
      Multiple-input multiple output (MIMO) communication systems can have dramatically higher throughput than single-input, single-output systems. Unfortunately, it can be difficult to find the space-time codes these systems need to achieve their potential. Previously published results located good codes by minimizing the maximum correlation between transmitted signals. This paper shows how this min-max method may produce sub-optimal codes. A new method which sorts codes based on the union bound of pairwise error probabilities is presented. This new technique can identify superior MIMO codes, providing higher system throughput without increasing the transmitted power or bandwidth requirements.
    • PERFORMANCE TRADE-OFFS WHEN IMPLEMENTING TURBO PRODUCT CODE FORWARD ERROR CORRECTION FOR AIRBORNE TELEMETRY

      Temple, Kip; Air Force Flight Test Center (International Foundation for Telemetering, 2005-10)
      Hardware implementing forward error correction (FEC) is currently available for utilization by the airborne telemetry system designer. This paper will discuss the potential benefits along with drawbacks when using this technology. Laboratory testing is supplemented with real-world flight testing. Performance results comparing FEC and non-FEC systems are presented for both IRIG-106 Pulse Code Modulation/Frequency Modulation, PCM/FM, (or Continuous Phase Frequency Shift Keying, CPFSK, with filtering, or ARTM Tier 0) and Shaped Offset Quadrature Phase Shift Keying, Telemetry Group version (SOQPSK-TG or ARTM Tier I) waveforms.
    • 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.
    • 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.
    • LAUNCH VEHICLE EXHAUST PLASMA / PLUME EFFECTS ON GROUND TELEMETRY RECEPTION, STARS IFT-14

      McWhorter, Mark; Honeywell Aerospace Electronic Systems (International Foundation for Telemetering, 2005-10)
      This paper discusses the effect of vehicle exhaust plasma/plume on the ability to receive telemetered data via an S-band RF link. The data discussed herein was captured during the launch of the STARS IFT-14 on February 13, 2005 from Kodiak Launch Center, Kodiak, Alaska using Alaska Aerospace Development Corporation’s (AADC) Range Safety and Telemetry System (RSTS), designed and integrated by Honeywell.
    • THE CTEIP TEST AND TRAINING ENABLING ARCHITECTURE, TENA, AN IMPORTANT COMPONENT IN REALIZING DOD TEST AND TRAINING RANGE INTEROPERABILITY

      Hudgins, B. Gene; Lucas, Jason; Eglin Air Force Base (International Foundation for Telemetering, 2005-10)
      While military asset testing and training might be seen as complementary in supporting military prepareness, they cannot complement each other without an effective and efficient method of distributing data laterally across geographically separated data gathering, analysis, and display systems. This cost-effective integration of range data and telemetry resources is critical to ensuring the war worthiness of today’s advanced weapon systems such as the Joint Strike Fighter and the sensor and weapon platforms such as the highly sophisticated unmanned vehicles that are beginning to populate the air, land, and sea areas of operations. To ensure the advantages of range interoperability are available across the DoD Test and Training ranges, a Central Test and Evaluation Program (CTEIP) project has developed and is refining the Test and Training Enabling Architecture (TENA). The core of TENA is the TENA Common Infrastructure, including the TENA Middleware and TENA Repository. The TENA Middleware is the high-performance, real-time, low-latency communication infrastructure used by range instrumentation software and tools during execution of a range event. The TENA Object Model enables semantic interoperability among range resource applications by encoding the information to be communicated among those range applications. It may be seen as a range community-wide set of interface and protocol definitions encapsulated in an object-oriented design. The TENA tools, utilities, and gateways assist the user in creating and managing an integration of range resources, as well as in optimizing the TENA Common Infrastructure. TENA has proven to be a critical enabler of distributed live exercises to include the U.S. Joint Forces Command’s Millennium Challenge 2002, two major Joint National Training Capability exercises in 2004, Cope Thunder 04-02, and Joint Roving Sands/Red Flag 2005. TENA, as integral part of range data systems, has become an important component in the realization of range interoperability.
    • WHY CHANGE FROM PCM? CASE STUDY OF THE AIRBUS A380 ETHERNET BASED DATA ACQUISITION NETWORK

      Sweeney, Paul; ACRA CONTROL Ltd. (International Foundation for Telemetering, 2005-10)
      The adaptation of ubiquitous Ethernet technology to airborne FTI systems is a relatively recent development, offering multiple advantages to FTI applications, including a high data throughput and ability to integrate COTS equipment with ease. For large-scale FTI applications – such as on the Airbus A380 - the use of traditional PCM based data acquisition systems results in enormously complex system architectures, with difficulties in system design, implementation, commissioning, test and maintenance. However, on the A380, the use of the Ethernet-based, IENA protocol alleviated these problems, in addition to offering several additional advantages. This paper explores the theoretical and practical implications of using Ethernet-based data acquisition in an FTI application, with direct comparison to an equivalent PCM based system.
    • A RELATIONAL APPROACH FOR MANAGING LARGE FLIGHT TEST PARAMETER LISTS

      Penna, Sérgio D.; Espeschit, Antônio Magno L.; EMBRAER Flight Test Engineering Division (International Foundation for Telemetering, 2005-10)
      The number of aircraft parameters used in flight-testing has constantly increased over the years and there is no sign that situation will change in the near future. On the contrary, in modern, software-driven, digital avionic systems, all sorts of parameters circulate through digital buses and can be transferred to on-board data acquisition systems more easily than those converted from traditional analog transducers, facilitating the request for more and more parameters to be acquired, processed, visualized, stored and retrieved at any given time. The constant unbalance between what parameter quantity engineers believe to be “sufficient” for developing and troubleshooting systems in a new aircraft, which tends to grow with aircraft complexity, and the associated cost of instrumenting a test prototype accordingly, which tends to grow beyond budget limits, pushes for new creative ways of handling both tendencies without compromising the ease of performing an engineering analysis directly from flight test data. This paper presents an alternative for handling large collections of flight test parameters through a relational approach, particularly in two important scenarios: the very basic creation and administration of the traditional “Flight Test Parameter List” and the transmission of selected data over a telemetry link for visualization in a Ground Station.
    • 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.
    • VEHICLE NETWORK CONCEPT DEMONSTRATION

      Grace, Thomas; Roach, John; Naval Air Systems Command; Teletronics Technology Corporation (International Foundation for Telemetering, 2005-10)
      CTEIP has launched the integrated Network Enhanced Telemetry (iNET) project to foster advances in networking and telemetry technology to meet emerging needs of major test programs as well as within the Major Range and Test Facility Base’s. This paper describes the objective of the vNET concept demonstration to provide a test vehicle instrumentation network architecture that can support additional capabilities for data access to the test vehicle. Three specific iNET system needs have been identified as being desirable as the basis for evaluating a Concept of Operation through this demonstration project. These three key areas are Data Mining, Gapless Telemetry, and Error Free Data delivery.
    • DATA SECURITY IN SOLID STATE DISKS

      Fitzgerald, Alan; Adtron Corporation (International Foundation for Telemetering, 2005-10)
      Solid state disk characteristics make them ideal for data collection in both harsh environments and secure telemetry application. In comparison to their magnetic counterparts, solid state disks are faster, more reliable, extremely durable and, with changing economies and geometries, more affordable and available in higher capacities than ever before. This paper will discuss solid state disk storage, access controls, and data elimination in relation to various telemetry scenarios. The reader will be introduced to the operational considerations of solid state disk data security and the underlying technical concepts of how these are implemented.
    • 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.
    • PACKET-BASED TELEMETRY NETWORKS OVER LEGACY SYSTEMS

      O’Connell, Tim; Nova Engineering, Inc. (International Foundation for Telemetering, 2005-10)
      The telemetry industry anticipates the tremendous potential value of adding full networking capability to telemetry systems. However, much of this potential can be realized while working with legacy equipment. By adding modules that interface transparently to existing equipment, continuous telemetry data can be encapsulated in discrete packets for over the air transmission. Packet fields can include header, sequence number and bytes for error detection and correction. The RF packet is transmitted without gaps through a standard serial interface and rate adjusted for the packet overhead – effectively making packetization transparent to a legacy system. The receiver unit performs packet synchronization, error correction, extraction of stream quality metrics and re-encapsulation of the payload data into an internet protocol (IP) packet. These standard packets can then be sent over the existing network transport system to the range control center. At the range control center, the extracted stream quality metrics are used to select the best telemetry source in real-time. This paper provides a general discussion of the path to a fully realized, packet-based telemetry network and a brief but comprehensive overview of the Hypernet system architecture as a case study.
    • MOBILITY MANAGEMENT IN IP-BASED SPACE NETWORK

      Wei, Huang; Weiling, Wu; Beijing University of Posts and Telecommunications (International Foundation for Telemetering, 2005-10)
      This paper tries to discuss the mobility management when Internet technology is applied along the whole path from spacecraft to ultimate customers in ground. In addition to Mobile IP protocol, micromobility solution is introduced during cross-support. Those competing micromobility solutions in mobile network research area are compared to select one that is most suitable to space network topology characteristics and operation traditions. Other issues are also taken into account, such as deployment and compatibility with Mobile IP when cross-support is not provided. Simulation comparison for hand-off performance with and without micro-mobility solution during cross-support is presented to justify our proposition.
    • BEST SOURCE SELECTORS AND MEASURING THE IMPROVEMENTS

      Gatton, Tim; Wyle Laboratories Telemetry and Data Systems (International Foundation for Telemetering, 2005-10)
      After years of tracing the evolution and solutions to finding the best data, I learned that it isn’t best source selection that we all want. What we need is best data selection.
    • 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.
    • A LOOK AT CELLULAR PACKET DATA PERFORMANCE FOR APPLICATION IN iNET

      Dean, Richard; Webley, Kayonne; Morgan State University (International Foundation for Telemetering, 2005-10)
      The integrated Network Enhanced Telemetry (iNET) environment is meant to build and improve on the existing unidirectional legacy telemetry links. The optimized network would have to be capable of providing bi-directional, spectrally efficient, reliable, dynamically allocated, real time or near real time access to video and other types of test data over a shared bandwidth, high capacity network. Developed specifically for providing a reliable means of communications for large numbers of users, cellular technology seems particularly suited to addressing iNET’s needs. This paper investigates the creation of a cellular model for enhanced throughput for data users wherein a user would dynamically be allocated high data rates dependent on parameters such as the received signal to noise ratio (SNR). Our future work will develop the average data performance, comparing both the time division multiple access (TDMA) and code division multiple access (CDMA) environments for potential application in iNET.