• IDAPS MULTI-CAMERA STORE SEPARATION ANALYSIS USING CAD-BASED MODELING

      Paulick, Michael J.; TYBRIN Corporation; Eglin Air Force Base (International Foundation for Telemetering, 2006-10)
      The Image Data Automated Processing System (IDAPS), developed by the 96th Communications Group Test and Analysis Division at Eglin AFB, uses a CAD-based image matching technique to calculate a 6DOF trajectory of a store separation event. The system has been used successfully for single camera release sequences, but needed to be extended for multi-camera releases. This is vital for bomber missions where several cameras are needed to cover a store separation event.
    • IEEE1588 – A solution for synchronization of networked data acquisition systems?

      Corry, Diarmuid; ACRA CONTROL INC (International Foundation for Telemetering, 2006-10)
      One of the problems for manufacturers and users of flight test data acquisition equipment, is to guarantee synchronization between multiple units acquiring data on the vehicle. Past solutions have involved proprietary interconnects and multiple wire installations increasing weight and complexity and reducing inter-operation of units. This problem has become particularly important given the trend towards commercial busses, especially Ethernet, as a system interconnect. The IEEE1588 standard offers a way to transmitting time accurately over Ethernet. This paper discusses the standard, how it might be implemented, and examines the issues involved in adopting this standard for flight test data acquisition. A particular implementation that results in a synchronized four-wire Ethernet based distributed data acquisition system is discussed in section 3.
    • AN IMPLEMENTATION OF DYNAMIC DATA ACQUISITION MEASUREMENTS

      Pesciotta, Eric; Portnoy, Michael; Teletronics Technology Corporation (International Foundation for Telemetering, 2006-10)
      As data acquisition systems evolve and begin utilizing new avenues of acquisition such as Ethernet, an entirely new range of flight test capabilities become available. These new capabilities, defined by acquisition, monitoring, and varying of test measurements, enhance previous operation as they can now be realized during flight. Achieving such high levels of integration between ground station and test vehicle involves complex network protocols. Implementing such systems from scratch would be a time consuming and costly proposition. Fortunately, employing Internet protocols (TCP/IP) over Ethernet provides a cornucopia of readily available technology. Using state-of-the-art integration techniques, modern data acquisition systems can leverage years of proven technology offered by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C). This paper discusses an implementation of dynamic data acquisition measurements for use in network data acquisition systems. The methodology used to determine whether or not a measurement can and should be variable during a flight test is examined in detail along with a discussion of the advantages of dynamically varying flight test measurements. Finally, an implementation is presented which successfully integrates Internet protocols with modern flight test equipment using the techniques described above for dynamic data acquisition measurements.
    • IMPORTANCE OF “ACCURATE” TIME TO TEST AND MEASUREMENT OF COMPLEX DYNAMIC SYSTEMS

      Blakely, Patrick A.; The Boeing Commercial Airplanes (International Foundation for Telemetering, 2006-10)
      This paper discusses the importance of time measurement and the necessity of time measurement accuracy to data acquisition and analysis. It briefly reviews how time is used in data analysis and how to determine what amount of jitter, latency and phase error is acceptable for various data acquisition systems and analysis methodology. It discusses the relevance of various measurement timing errors and how some of them may be corrected. Finally, this paper discusses various approaches to time tagging of measurements in a distributed network based data system where data is packetized for efficient transmission.
    • INSTRUMENTING AN AIRBORNE NETWORK TELEMETRY LINK

      Laird, Daniel; Temple, Kip; Edwards Air Force Base (International Foundation for Telemetering, 2006-10)
      The Central Test and Evaluation Investment Program (CTEIP) Integrated Network Enhanced Telemetry (iNET) program is currently testing a wireless local area networking (WLAN) in an L-band telemetry (TM) channel to evaluate the feasibility and capabilities of enhancing traditional TM methods in a seamless wide area network (WAN). Several advantages of networking are real-time command and control of instrumentation formats, quick-look acquisition, data retransmission and recovery (gapless TM) and test point real-time verification. These networking functions, and all others, need to be tested and evaluated. The iNET team is developing a WLAN based on 802.x technologies to test the feasibility of the enhanced telemetry implementation for flight testing.
    • INTEGRATED CAMERAS AS A REPLACEMENT FOR VEHICULAR MIRRORS

      Lee, Hua; Chin, Maurice; Clark, Nicholas; Dunne, Fiona; University of California, Santa Barbara (International Foundation for Telemetering, 2006-10)
      Drivers’ visibility is an area of automobile safety that has seen very limited improvement over the past several decades. Limited visibility is responsible for many car accidents all across America. Mirrors require constant readjustment, and are easily blocked. There is currently a lot of interest in ways to reduce or eliminate all mirrors on a car, and one such method is through a wide-angle network of cameras mounted on the vehicle’s rear. Using real-time video processing, the data from several cameras can be spliced together, and displayed on a vehicle’s dashboard in an intuitive, easy to understand fashion that a driver can quickly see without having to turn away from the road. This has extensive application to light armored vehicles in the military, as well as to automotive designers today.
    • INTERFERENCE MITIGATION AND CHANNEL EQUALIZATION FOR ARTM TIER-1 WAVEFORMS USING KALMAN FILTER

      Saquib, Mohammad; Popescu, Otilia; Popescu, Dimitrie C.; Rice, Michael; University of Texas; Brigham Young University (International Foundation for Telemetering, 2006-10)
      In this paper we describe a new method that is applicable to mitigating both multipath interference and adjacent channel interference (ACI) in aeronautical telemetry applications using ARTM Tier-1 waveforms. The proposed method uses a linear equalizer that is derived using Kalman filtering theory, which has been used for channel equalization for high-speed communication systems. We illustrate the proposed method with numerical examples obtained from simulations that show the bit error rate performance (BER) for different modulation schemes.
    • INTERFERENCE REJECTION PERFORMANCE AS A MEANS OF FREQUENCY OPTIMISATION IN A MIXED CELLULAR/MANET NETWORK

      Dean, Richard; Webley, Kayonne; Morgan State University (International Foundation for Telemetering, 2006-10)
      Research at Morgan State University shows a means of enabling both a mobile ad-hoc network (MANET) and a cellular network to operate simultaneously in the same spectrum. This enhanced frequency efficiency would facilitate the creation of a hybrid or Mixed Cellular/MANET network (MCMN) in which each of the MCMN sub-networks would have access to the entire allotted spectrum. Interference rejection and excision have been identified as a means of distinguishing between and isolating the two different kinds of signals. This paper shows the promising performance of such techniques within the MCMN environment as a part of the integrated Network Enhanced Telemetry (iNET) project.
    • International Telemetering Conference Proceedings, Volume 42 (2006)

      International Foundation for Telemetering, 2006-10
    • IP Protocols in Telemetry Systems

      Weaver, Robert Jr.; Snyder, Ed; Apogee Labs, Inc. (International Foundation for Telemetering, 2006-10)
      This paper is intended to provide background into networking and IP protocols for non-IT personnel. It is not a study of networking and related protocols, as each of these topics would require a much longer period of time to explain. Addressed are considerations that should be required prior to locking a network design into a specific architecture. The systems available today, for the same cost as a good home PC, are becoming capable of performing critical tasks. It is highly recommended that the personnel who know the most about the data and how it will be used communicate with the personnel that know the network. Failing to explain or understand the networking nomenclature causes considerable wasted time and money. This paper is intended to encourage communications between the data creators and the data movers. We also want to demonstrate how new systems, hardware and software, designed to work with existing network devices used in non–telemetry applications, can make implementing IP in telemetry networks easier.
    • AN IP-BASED RECORDING SYSTEM

      Roach, John; Hildin, John; Teletronics Technology Corporation (International Foundation for Telemetering, 2006-10)
      Traditionally, acquired instrumentation data on a non-destructive test article is recorded to a nonvolatile memory recorder. The data acquisition system usually samples and formats its inputs before transmitting the data to the recorder (also known in this paper as a data sink) via a PCM serial data stream (i.e., clock and data). In a network-based data acquisition architecture, the inclusion of an IP-based recorder adds a new dimension to the data acquisition process. Any IP network inherently allows for the bi-directional exchange of data. In this environment, the IPbased recorder can be treated as both a data sink for parameter recording and a data source for parameter extraction, data rate statistics, and recorder status reporting. The network model recasts the data recorder’s function as a file server to which multiple clients could be simultaneously requesting services. Those clients that represent the data acquisition nodes are requesting storage of their acquired parameters. Clients, such as transmitters or test engineers, are requesting access to archived data or status information for further processing. This paper presents the advantages of using an IP-based recorder in a network-based data acquisition system. The availability of an IP interface along with the intelligence built into the recorder expands its capabilities beyond that of a conventional PCM recorder. These capabilities include real-time health monitoring, support for the Simple Network Management Protocol (SNMP), data mining, reporting of real-time performance and network statistics.
    • IS THERE A SHAPED OFFSET 8-PSK?

      Rice, Michael; Nelson, Tom; Brigham Young University (International Foundation for Telemetering, 2006-10)
      Motivated by the success of the ARTM Tier-1 modulation known as Shaped Offset QPSK, this paper examines whether improved spectral efficiency can be achieved using an a Shaped Offset 8PSK. Three possible interpretations of this question are examined and it is shown that there does not appear to be a shaped offset 8-PSK in the context of aeronautical telemetry.
    • JOINT INTERFERENCE SUPPRESSION AND QRD-M DETECTION FOR SPATIAL MULTIPLEXING MIMO SYSTEMS IN A RAYLEIGH FADING CHANNEL

      Tsai, Chiou-Wei; Cagley, Richard E.; Iltis, Ronald A.; University of California; Toyon Research Corporation (International Foundation for Telemetering, 2006-10)
      Spatial multiplexing (SM) systems have received significant attention because the architecture offers high spectral efficiency. However, relatively little research exists on optimization of SM systems in the presence of jamming. In a spatially uncoded SM system, such as V-BLAST, the channel state information is assumed to be unavailable a priori at both transmitter and receiver. Here, Kalman filtering is used to estimate the Rayleigh fading channel at the receiver. The spatial correlation of the jammer plus noise is also estimated, and spatial whitening to reject the jammers is employed in both the Kalman channel estimator and detector. To avoid the exponential complexity of maximum-likelihood (ML) detection, the QRD-M algorithm is employed. In contrast to sphere decoding, QRD-M has fixed decoding complexity of order O(M), and is thus attractive for hardware implementation. The performance of the joint Kalman filter channel estimator, spatial whitener and QRD-M detector is verfied by simulations.
    • LAUNCH VEHICLE EXHAUST PLASMA / PLUME EFFECTS ON GROUND TELEMETRY RECEPTION, STARS FT-04-1

      McWhorter, Mark; Honeywell Aerospace Electronic Systems (International Foundation for Telemetering, 2006-10)
      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 presented herein were captured during the launch of the STARS FT-04-1 on February 23, 2006 from Kodiak Launch Center, Kodiak, Alaska using Alaska Aerospace Development Corporation’s (AADC) Range Safety and Telemetry System (RSTS), designed and integrated by Honeywell.
    • LEVERAGING INTERNET PROTOCOL (IP) NETWORKS TO TRANSPORT MULTI-RATE SERIAL DATA STREAMS

      Heath, Doug; Polluconi, Marty; Samad, Flora; RT Logic Incorporated (International Foundation for Telemetering, 2006-10)
      As the rates and numbers of serial telemetry data streams increase, the cost of timely, efficient and robust distribution of those streams increases faster. Without alternatives to traditional pointto- point serial distribution, the complexity of the infrastructure will soon overwhelm potential benefits of the increased stream counts and rates. Utilization of multiplexing algorithms in Field- Programmable Gate Arrays (FPGA), coupled with universally available Internet Protocol (IP) switching technology, provides a low-latency, time-data correlated multi-stream distribution solution. This implementation has yielded zero error IP transport and regeneration of multiple serial streams, maintaining stream to stream skew of less than 10 nsec, with end-to-end latency contribution of less than 15 msec. Adoption of this technique as a drop-in solution can greatly reduce the costs and complexities of maintaining pace with the changing serial telemetry community.
    • MANAGING MULTI-VENDOR INSTRUMENTATION SYSTEMS WITH ABSTRACTION MODELS

      Lockard, Michael T.; Garling, James A. Jr; EMC Corporation, Solutions Engineering Group (International Foundation for Telemetering, 2006-10)
      The quantity and types of measurements and measurement instrumentation required for a test are growing. This paper describes a methodology to define and program multi-vendor instrumentation using abstraction models in a database that allows new instrumentation to be defined rapidly. This allows users to support multiple vendors’ systems while using a common user interface to define instrumentation networks, bus catalogs, measurements, pulse code modulated (PCM) formats, and data processing requirements.
    • MEDIAN FILTERS

      Hicks, William T.; IMET Corporation (International Foundation for Telemetering, 2006-10)
      Most modern digital filtering is done by taking the average (mean) of a signal or some weighted average. Another method is to use feedback, which more closely resembles how analog filters with feedback operate. In the case of low pass filters, all these methods tend to give a trade off in getting the signal to pass while attenuating the higher frequency noise. An alternative is to use a median filter, which selects the mid value of a group of points. While this is not as computationally simple as other filters, it allows for the attenuation of noise while allowing sudden changes in signal level to pass thru unaltered. This paper discusses the characteristics of median filters and methods of implementing them.
    • METADATA FOR RANGE TELEMETRY

      Grace, Thomas; Fink, Clay; Naval Air Systems Command; John Hopkins University Applied Physics Laboratory (International Foundation for Telemetering, 2006-10)
      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. This paper describes an approach for providing a unified means of describing telemetry systems. It will describe the motivation and framework for a metadata standard for specifying the components of an instrumented test article, its data and the flow of data through a telemetry system. The paper will also describe how this metadata standard can provide the means for describing different transmission formats for a common test article. The result of the task described by this paper will lead to a standard or set of standards that will optimize the use of commercial technology and tools.
    • MINING IRIG-106 CHAPTER 10 AND HDF-5 DATA

      Lockard, Michael T.; Rajagopalan, R.; Garling, James A.; EMC Corporation, Solutions Engineering Group (International Foundation for Telemetering, 2006-10)
      Rapid access to ever-increasing amounts of test data is becoming a problem. The authors have developed a data-mining methodology solution approach to provide a solution to catalog test files, search metadata attributes to derive test data files of interest, and query test data measurements using a web-based engine to produce results in seconds. Generated graphs allow the user to visualize an overview of the entire test for a selected set of measurements, with areas highlighted where the query conditions were satisfied. The user can then zoom into areas of interest and export selected information.
    • NETWORK DATA ACQUISITION AND PLAYBACK OF MULTIMEDIA DATA

      Portnoy, Michael; Yang, Hsueh-Szu; Teletronics Technology Corporation (International Foundation for Telemetering, 2006-10)
      Traditional data acquisition systems have relied on physical connections between data sources and data receivers to handle the routing of acquired data streams. However, these systems grow exponentially in complexity as the number of data sources and receivers increases. New techniques are needed to address the ever increasing complexity of data acquisition. Furthermore, more advanced mechanisms are needed that move past the limitations of traditional data models that connect each data source to exactly one data receiver. This paper presents a software framework for the playback of multiplexed data acquired from a network acquisition system. This framework uses multicast technologies to connect data sources with multiple data receivers. The network acquisition system is briefly introduced before the software framework is discussed. Both the challenges and advantages involved with creating such a system are presented. Finally, this framework is applied to an aviation telemetry example.