• IHAL and Web Service Interfaces to Vendor Configuration Engines

      Hamilton, John; Darr, Timothy; Fernandes, Ronald; Sulewski, Joe; Jones, Charles; Knowledge Based Systems, Inc.; L-3 Telemetry East; Edwards Air Force Base (International Foundation for Telemetering, 2010-10)
      In this paper, we present an approach towards achieving standards-based multi-vendor hardware configuration. This approach uses the Instrumentation Hardware Abstraction Language (IHAL) and a standardized web service Application Programming Interface (API) specification to allow any Instrumentation Support System (ISS) to control instrumentation hardware in a vendor neutral way without requiring non-disclosure agreements or knowledge of proprietary information. Additionally, we will describe a real-world implementation of this approach using KBSI‟s InstrumentMap application and an implementation of the web service API by L-3 Communications Telemetry East.
    • iNET Standards Validation: End-to-End Performance Assessment

      Moodie, Myron L.; Araujo, Maria S.; Grace, Thomas B.; Malatesta, William A.; Abbott, Ben A.; Southwest Research Institute; Naval Air Systems Command (NAVAIR) (International Foundation for Telemetering, 2010-10)
      The integrated Network-Enhanced Telemetry (iNET) project has developed standards for network-based telemetry systems. While these standards are based largely on the existing body of commercial networking protocols, the Telemetry Network System (TmNS) has more stringent performance requirements in the areas of latency, throughput, operation over constrained links, and quality of service (QoS) than typical networked applications. A variety of initial evaluations were undertaken to exercise the interfaces of the current standards and determine real-world performance. The core end-to-end performance initial evaluations focus collectively on the movement of telemetry data through the TmNS. These initial evaluations addressed two areas: end-to-end data delivery and parametric data extraction. This paper presents the approach taken by these ongoing efforts and provides initial results. The latest results will be presented at ITC 2010.
    • iNET System Management Scaling

      Bertrand, Allison R.; Newton, Todd A.; Grace, Thomas B.; Southwest Research Institute; Naval Air Systems Command (NAVAIR) (International Foundation for Telemetering, 2010-10)
      The integration of standard networking technologies into the test range allows for more capable and complex systems. As System Management provides the capability for dynamic allocation of resources, it is critical to support the level of network flexibility envisioned by the integrated Network-Enhanced Telemetry (iNET) project. This paper investigates the practical performance of managing the Telemetry Network System (TmNS) using the Simple Network Management Protocol (SNMP). It discusses the impacts and benefits of System Management as the size of the TmNS scales from small to large and as distributed and centralized management styles are applied. To support dynamic network states, it is necessary to be able to both collect the current status of the network and command (or modify the configuration of) the network. The management data needs to travel both ways over the telemetry link (in limited bandwidth) without interfering with critical data streams. It is important that the TmNS's status is collected in a timely manner so that the engineers are aware of any equipment failures or other problems; it is also imperative that System Management does not adversely affect the real-time delivery of data. This paper discusses measurements of SNMP traffic under various loading conditions. Statistics considered will include the performance of SNMP commands, queries, and events under various test article and telemetry network loads and the bandwidth consumed by SNMP commands, queries, and events under various conditions (e.g., pre-configuration, normal operation, and device error).
    • iNET System Operational Flows

      Grace, Thomas B.; Abbott, Ben A.; Moodie, Myron L.; Southwest Research Institute; Naval Air Systems Command (NAVAIR) (International Foundation for Telemetering, 2010-10)
      The integrated Network-Enhanced Telemetry (iNET) project is transitioning from standards development to deployment of systems. In fielding a Telemetry Network System (TmNS) demonstration system, one must choose and integrate technological building blocks from the suite of standards to implement new test capabilities. This paper describes the operation of a TmNS and identifies the management, configuration, control, acquisition, and distribution of information and operational flows. These items are discussed utilizing a notional system to walk through the mechanisms identified by the iNET standards. Note that at the time of this paper the efforts discussed are only at the very beginning of the design process and will likely evolve throughout the design process.
    • Information Assurance (IA) Considerations for a Telemetry Network System (TmNS)

      Hodack, David; Naval Air Systems Command (International Foundation for Telemetering, 2010-10)
      The integrated Network Enhanced Telemetry (iNET) project was launched by the Central Test and Evaluation Investment Program (CTEIP) to foster network enhanced instrumentation and telemetry. The iNET program is preparing for the TmNS system demonstration. The goal of the demonstration is to prove that the proposed TmNS will meet the Test Capability Requirements Document (TCRD) and validate the iNET standards. One aspect of the preparation is looking at the IA issues and making decisions to ensure that the system will be certified and accredited, meet user needs, and be secure. This paper will explore a few of these considerations.
    • An Integrated Data Acquisition System for Parachute Development and Qualification Testing

      Starbuck, Philip; PSG and Associates (International Foundation for Telemetering, 2010-10)
      The development and qualification of personnel and cargo aerial delivery parachute systems present unique challenges to the instrumentation and data analysis engineers. Some of the areas that must be addressed include: a) system must be low in cost, b) system often has to be operated on ranges that have limited telemetry or other range instrumentation and support (i.e. commercial skydiving centers), c) system is often rigged and operated by parachute support personnel and test jumpers rather than instrumentation engineers, and d) system must be able to be reconfigured in the field to support a variety of test card requirements during a typical test day, e) data must be available for review and the system be prepared for the next test within a few minutes of parachute recovery, and f) system must withstand ground impact velocities as high as 50 ft/sec (15.24 m/sec) without damage. This paper describes such a system as it is being used for the development and qualification testing of a number of parachute systems for sport skydiving, military personnel, as well as cargo parachute systems. This modular system has been developed as a result of previous experience in other parachute development and qualification projects to address the need for a flexible Data Acquisition System (DAS) system that meets the above requirements. This paper describes some of the tools used to meet these requirements.
    • Integrating Wireless Sensor Technologies into Instrumentation and Telemetry Systems

      Araujo, Maria S.; Moodie, Myron L.; Willden, Greg C.; Thibodeaux, Ryan J.; Abbott, Ben A.; Southwest Research Institute (International Foundation for Telemetering, 2010-10)
      Recent technological advancements in low-power, low-cost, small-footprint embedded processors, sensors, and radios are resulting in the very rapid growth of wireless sensor network deployments. Wireless sensor networks merge the scalability and distributed nature of networked systems with the size and energy constraints of remote embedded systems. With the ever increasing need to develop less intrusive, more scalable solutions for instrumentation systems, wireless sensor technologies present several benefits. They largely eliminate the need for power and network wiring, thus potentially reducing cost, weight, and deployment time; their modularity provides the flexibility to rapidly change instrumentation configurations and the capability to increase the coverage of an instrumentation system. While the benefits are exciting and varied, as with any emerging technology, many challenges need to be overcome before wireless sensor networks can be effectively and successfully deployed in instrumentation applications, including throughput, latency, power management, electromagnetic interference (EMI), and band utilization considerations. This paper describes some approaches to addressing these challenges and achieving a useful system.
    • Integrity Analysis and Fault Detection of Flight Test Data

      Glenn, Gregory J.; Duong, Nhattrieu; Speyer, Jason L.; Sysense, Inc. (International Foundation for Telemetering, 2010-10)
      Undetected sensor malfunctions during flight testing can lead to cost overruns and program delays. Determining the presence of these faults in a timely manner allows the operator to mitigate their effect. One way to detect these faults is to use a priori knowledge of sensor calibration data and system dynamics to calculate measurement uncertainties. These can then be used to determine the integrity of the sensor data and report violations of expected sensor behavior. Analytical redundancy methods and residual processing can be used in conjunction with a priori sensor information to detect faults otherwise unobserved with single-instrument data as well as to isolate and identify failure modes. These simulation and analysis methods have been implemented as MATLAB® Simulink® blocks and were used to model the flight instruments, detect anomalies in the navigation instruments, and locate the origin of the errors of a flight test data set.
    • International Telemetering Conference Proceedings, Volume 46 (2010)

      International Foundation for Telemetering, 2010-10
    • Introduction to XidML 3.0 An Open XML Standard for Flight Test Instrumentation Description

      Cooke, Alan; Herbepin, Christian; ACRA Control; Eurocopter (International Foundation for Telemetering, 2010-10)
      A few years ago XidML was introduced as an open XML standard for capturing the meta-data associated with flight test instrumentation (FTI). This meta-data schema was broken down into elements for Parameter (name, range, units, offset-binary), Instrument (name, serial number, misses-to loss), Package (bits per word, words per minor-frame, rate) and Link (name, type) and so on. XidML remains one of the only published schema for FTI meta-data and with XidML 3.0 many simplifications have been introduced along with support for nested tree structures and a single instrument schema allowing anyone to define the validation for instruments from any vendor. This paper introduces the XidML schema and describers the benefits of XidML 3.0 in particular. It begins by giving a brief description of what XidML is and describes its history and motivation. The paper then outlines the main differences between XidML-3.0 and earlier versions, and how the XidML schema has been further refined to meet the challenges faced by the FTI community. As an example of usage the FTIManager software developed at Eurocopter will be briefly presented in order to illustrate the XidML ability to describe a multi-vendor FTI configuration.
    • L-3 Communications 3rd Generation Telemetry Transmitter ST-5000 L/S/C Band Architecture and Design Efforts

      Wang, Wearn-Juhn; Martz, David; Hutzel, Kevin; L-3 Communications Telemetry East; L-3 Communications Nova Engineering (International Foundation for Telemetering, 2010-10)
      This paper presents the architecture and design efforts for L-3 3rd generation telemetry transmitter ST-5000. A Modulator/Upconverter with a low phase noise PLL synthesizer, a highly efficient and rugged power amplifier module with the multistage GaN HEMT devices and a high power density buck-boost power supply are discussed.
    • L-Band Coplanar Slot Loop Antenna for iNET Applications

      Nithianandam, Jeyasingh; Morgan State University (International Foundation for Telemetering, 2010-10)
      In this article we present a design of an L-band slot loop antenna with a dielectric loaded conductor backed coplanar waveguide (CBCPW) feed. The coplanar slot loop antenna has a transmission line resonator in series. We used full wave electromagnetic simulations with Ansoft's high frequency structure simulator (HFSS) software in the design of the coplanar slot loop antenna. The series transmission line resonator helps to tune the coplanar slot loop antenna and reduce its size. We present here results on return loss and radiations patterns of coplanar slot loop antenna obtained from HFSS simulations.
    • Latest Status on Adding FTS Capability to a Missile Telemetry Section

      Kujiraoka, Scott; Fielder, Russell; Jones, Johnathan; Sandberg, Aliva; NAVAIR (International Foundation for Telemetering, 2010-10)
      Development is currently underway to produce a dual redundant Flight Termination System (FTS) capable Missile Telemetry Section. This FTS will mainly consist of a conformal wraparound antenna, two flight termination safe & arm (FTS&A) devices, two flight termination receivers (FTR), two explosive foil initiators (EFI) and destruct charge. This paper will discuss the current status of the development of these FTS components along with the process of obtaining the Flight Certification from Range and System Safety to fly this newly outfitted missile on a governmental test range.
    • Localization Using CDMA-MIMO Radar

      Iltis, Ronald A.; University of California, Santa Barbara (International Foundation for Telemetering, 2010-10)
      A MIMO radar system for target localization is presented which uses direct-sequence CDMA (DS-CDMA) waveforms. The received DS-CDMA signal at each antenna is expressed directly in terms of the target positions. The waveforms employed are Gold sequences, and hence are not exactly orthogonal. A generalized successive interference cancellation (GSIC) approach is used to resolve multiple scatterers and reduce clutter. Simulation results are presented which suggest the capability to detect weak scatterers in the presence of clutter using the cancellation method.
    • A Low Cost, Quick Reaction TM Acquisition System Solution for Deployed Testing

      Pozmantier, Ronald; Edwards Air Force Base (International Foundation for Telemetering, 2010-10)
      Design, development, fabrication, and deployment of an austere, deployable telemetry (TM) system, in only 3 1/2 weeks, will be discussed. This austere approach will be compared to a standard approach. TM candidate systems will be discussed along with exigencies and limitations (test geometry, link analysis, multiple test areas, schedule, cost, fabrication ...) that shaped their selection. Utilization of existing Radio Frequency (RF) systems in "unintended" applications will be discussed. System setup and BER testing with a simulated 'aircraft' will be presented, including observed multipath effects during testing, versus actual performance. Finally, benefits and test efficiencies garnered by having vehicle TM, real- time TM acquisition, processing and display, while deployed to a test area with no range instrumentation, will be presented.
    • Low-Complexity Finite Precision Decoders for Low-Density Parity-Check Codes

      Vasic, Bane; Declercq, David; Marcellin, Michael W.; Planjery, Shiva Kumar; University of Arizona (International Foundation for Telemetering, 2010-10)
      We present a new class of finite-precision decoders for low-density parity-check (LDPC) codes. These decoders are much lower in complexity compared to conventional floating-point decoders such as the belief propagation (BP) decoder, but they have the potential to outperform BP. The messages utilized by the decoders assume values (or levels) from a finite discrete set. We discuss the implementation aspects as well as describe the underlying philosophy in designing these decoders. We also provide results to show that in some cases, only 3 bits are required in the proposed decoders to outperform floating-point BP.
    • Mapping Traffic Flow for Telemetry System Planning

      Kosbar, Kurt; Rivera, Grant; Missouri University of Science and Technology (International Foundation for Telemetering, 2010-10)
      Telemetry receivers must typically be located so that obstacles do not block the signal path. This can be challenging in geometrically complex indoor environments, such as factories, health care facilities, or offices. An accurate method for estimating the paths followed by typical telemetry transmitters in these environments can assist in system planning. It may be acceptable to provide marginal coverage to areas which are rarely visited, or areas which transmitters quickly transit. This paper discusses the use of the ant colony optimization and its application to the telemetry system planning problem.
    • A Mathematical Model for Instrumentation Configuration

      Jones, Charles H.; Edwards Air Force Base (International Foundation for Telemetering, 2010-10)
      This paper describes a model of how to configure settings on instrumentation. For any given instrument there may be 100s of settings that can be set to various values. However, randomly selecting values for each setting is not likely to produce a valid configuration. By "valid" we mean a set of setting values that can be implemented by each instrument. The valid configurations must satisfy a set of dependency rules between the settings and other constraints. The formalization provided allows for identification of different sets of configurations settings under control by different systems and organizations. Similarly, different rule sets are identified. A primary application of this model is in the context of a multi-vendor system especially when including vendors that maintain proprietary rules governing their systems. This thus leads to a discussion of an application user interface (API) between different systems with different rules and settings.
    • Microcontroller Based Multiple-Input Multiple-Output Transmitter

      Kosbar, Kurt; Kanday, Balaji Madapuci; Missouri University of Science and Technology (International Foundation for Telemetering, 2010-10)
      This paper describes how a microcontroller based system can be used to generate the signals needed in a multiple-input multiple-output (MIMO) system transmitter. The limited computational speed of the microcontroller, along with other tasks which the controller may need to handle, places limits on the throughput of the system, and the complexity of the MIMO signal design. However this can be a low cost design, and the microcontroller can be used to perform other operations in the system, which may make it attractive in some applications.
    • Mixed Network Clustering with Multiple Ground Stations and Nodes Preferences

      Dean, Richard; Traore, Oumar; Gwanvoma, Stephen; Morgan State University (International Foundation for Telemetering, 2010-10)
      This paper presents a method for managing a Mixed Network with multiple ground stations and Test Articles (TA) preferences. The main difference between a Ground Station (cellular) network and the over the horizon (ad-hoc) network is that the ad-hoc method has no fixed infrastructure. This paper presents the computation and performance of a clustering technique for mobile nodes within the simulated mixed network environment with multiple ground stations and users preferences for those ground stations. This includes organization for multiple ground stations and for TA's gravitating toward a ground station of their choice on the basis of service and performance.