• C-Band Transmitter Experimental (CTrEX) Test at White Sands Missile Range (WSMR)

      Nevarez, Jesus; Dannhaus, Joshua; White Sands Missile Range (International Foundation for Telemetering, 2015-10)
      The Department of Defense (DoD) anticipated the eventual sell off of a portion of the Aeronautical Mobile Telemetry (AMT) frequency spectrum (from 1755-1780 and 2155-2180 MHz), prompting the telemetry (TM) community to start designing and testing systems capable of operating in a portion of the C-Band spectrum (4400-4940 MHz and 5091-5150 MHz) several years ago. On December 17, 2014 the NAVY targets office at White Sands Missile Range (WSMR) launched the first in a series of C-band and S-band instrumented Orion vehicles to provide RF transmitted data products for ground system collection and in-depth analysis. This paper presents the first C-band Transmitter Experimental (CTrEX) high-dynamic, spinning vehicle test at WSMR and summarizes the initial findings along with a path forward for future CTrEX rocket tests.
    • Interoperability Standards for Network Based Airborne Video Systems

      Buckley, Mark; Berard, Alfredo; Butler, Michael; Telspan Data; Eglin Air Force Base (International Foundation for Telemetering, 2015-10)
      The deployment of network-based airborne instrumentation is leading to cost efficient replacement of legacy systems. One application of airborne instrumentation systems that has to this point been developed and maintained separately from traditional avionics and orange-wire data acquisition systems is video and imagery. The development of network-based video and imagery systems has led to an opportunity to unify these two previously distinct airborne data acquisition activities using standards for plug-n-play interoperability across airframes and organizations. This paper describes standards based network-based video and imagery instrumentation systems which, are being implemented to replace existing proprietary systems.
    • International Telemetering Conference Proceedings, Volume 51 (2015)

      Unknown author (International Foundation for Telemetering, 2015-10)
    • Telemetry System Architecture for a Solar Car

      Walter, Eric; Glover, Nicholas; Cureton, Jesse; Kosbar, Kurt; Missouri University of Science and Technology (International Foundation for Telemetering, 2015-10)
      This paper discusses the telemetry system used to monitor the performance of a solar-powered vehicle during testing and competitions. Car-side systems collect and transmit data onboard over an ISO 11898 / CAN bus. A bridge then converts this data into TCP/IP packets, which are transmitted via Ethernet to a Wi-Fi access point. The data is distributed through an IEEE 802.11N 5GHz mesh network to provide real time data to remote computers running telemetry software. This software displays and logs data from the car, allowing team members to monitor the vehicle.
    • Maximum Likelihood Detection from Multiple Bit Sources

      Rice, Michael; Perrins, Erik; Brigham Young University; University of Kansas (International Foundation for Telemetering, 2015-10)
      This paper deals with the problem of producing the best bit stream from a number of input bit streams with varying degrees of reliability. The best source selector and smart source selector are recast as detectors, and the maximum likelihood bit detector (MLBD) is derived from basic principles under the assumption that each bit value is accompanied by a quality measure proportional to its probability of error. We show that both the majority voter and the best source selector are special cases of the MLBD and define the conditions under which these special cases occur. We give a mathematical proof that the MLBD is the same as or better than the best source selector.
    • 3D Printable Multilayer RF Integrated System

      Wicker, Ryan; MacDonald, Eric; Xin, Hao; Yu, Xiaoju; Liang, Min; Shemelya, Corey; University of Arizona; University of Texas at El Paso (International Foundation for Telemetering, 2015-10)
      In this work, a 3D-printable multilayer phased array system is designed to demonstrate the applicability of additive manufacturing technique combining dielectric and conductor processes at room temperature for RF systems. Phased array systems normally include feeding networks, antennas, and active components such as switches, phase shifters and amplifiers. To make the integrated system compact, the array system here uses multilayer structure that can fully utilize the 3D space. The vertical interconnections between layers are carefully designed to reduce the loss between layers. Simulated results show good impedance matching and high-directive scanning beam. This multilayer phased array will finally be 3D printed by integrating thermal / ultrasound wire mesh embedding method (for metal) and fused-deposition-modeling technique (for dielectric).
    • Computer Vision Analysis for Vehicular Safety Applications

      Wang, Yuan-Fang; University of California (International Foundation for Telemetering, 2015-10)
      In this paper, we present our research on using computer-vision analysis for vehicular safety applications. Our research has potential applications for both autonomous vehicles and connected vehicles. In particular, for connected vehicles, we propose three image analysis algorithms that enhance the quality of a vehicle's on-board video before inter-vehicular information exchange takes place. For autonomous vehicles, we are investigating a visual analysis scheme for collision avoidance during back up and an algorithm for automated 3D map building. These algorithms are relevant to the telemetering domain as they involve determining the relative pose between a vehicle and other vehicles on the road, or between a vehicle and its 3D driving environment, or between a vehicle and obstacles surrounding the vehicle.
    • An Evaluation System for Airplane's Power Supply

      Song, Jian; Luo, Ni; Cao, Liu; Xu, Min; Beijing Zoweetech Ltd. (International Foundation for Telemetering, 2015-10)
      Power supply is the most critical unit in an airplane. A defect in a power supply might lead to a crash. Therefore, it is very useful and important to monitor the status of the airplane's power supply during flight. This paper presents a real-time evaluation system constructed by a central process unit for processing and detecting defects and several remote units for acquiring parameters. Because of the huge amount of data acquired, a combination of Ethernet and time division multiplexing technique has been applied for constructing a 2.5Gbps synchronous data transportation network for the system.
    • Packet-Based Best Source Selector and Other IP-Telemetry Tricks

      Newton, Todd A.; Abbott, Ben A.; Southwest Research Institute (International Foundation for Telemetering, 2015-10)
      IP-telemetry radios are being connected to existing ground networks, thereby integrating the air and ground. While this provides full connection to Test Article (TA) networks, the mobility of TAs and the transient nature of test missions leave the overall experience feeling less than "real" networks. We describe a toolset that extends the capabilities of integrated IP-telemetry and range networks through specialized routing techniques focused on mission-based data delivery needs. The toolset provides a configurable capability enabling packet-based best source selection, firewalling, multicasting, and QoS enforcement across the range on a per program basis. The building blocks of the toolset allow for the creation of virtualized network components that are mission-based rather than infrastructure and enables seamless network operation with network telemetry, giving mission personnel the ability to specialize the network for their needs without depending upon the range IT department.
    • A Comparison of Coherent Detectors for SOQPSK-TG

      Xingwen, Ding; Wantao, Zhai; Jianyong, Song; Ming, Chen; Beijing Research Institute of Telemetry (International Foundation for Telemetering, 2015-10)
      SOQPSK-TG is a highly bandwidth-efficient constant-envelope modulation so that it has been applied in airspace telemetry widely. We compare four types of coherent detectors for SOQPSK-TG, which are optimal detector, pulse truncation (PT) detector, standard OQPSK detector and modified OQPSK detector. The simulation and analysis results indicate that PT detector has the advantages of low complexity and good performance, so it has more practicality value.
    • A Software Defined Radio Based Architecture for the Reagan Test Site Telemetry Modernization (RTM) Program

      Ardrey, David; Gimler, Gregory; Pippitt, Mark; MIT Lincoln Laboratory (International Foundation for Telemetering, 2015-10)
      MIT Lincoln Laboratory has developed a Software Defined Radio based architecture for the Reagan Test Site Telemetry Modernization (RTM) program, which will enhance the current operations of the ground based telemetry systems and enable new modes of operation. There are three main objectives of the RTM program; increasing overall system performance, improving reliability and maintainability, and enabling future customer needs. RTM provides a fully integrated system that can be configured and remotely controlled from a single location. This centralized command and control provides a way to automate certain functions and frees up operator resources, especially for more complex mission scenarios. Software modules, running on general-purpose computers perform signal and data processing that have been traditionally performed in special purpose hardware based components. This provides the flexibility to scale and adapt to future needs, such as spectrum change, increased need for capacity, and changes to modulation, encoding, and compression. Index Terms - Software Defined Radio (SDR), Open systems architecture, telemetry receiver architecture, Aeronautical Mobile Telemetry (AMT)
    • B-2 Flight Test Implementation of an Ethernet Based Network System for Data Acquisition

      Hochner, William "Bill"; Northrop Grumman Aerospace (International Foundation for Telemetering, 2015-10)
      Northrop Grumman Corporation's B-2 Flight Test Instrumentation team is revamping its entire Data Acquisition System (DAS) to be an Ethernet based network (EBN) system that will provide simplified wiring, higher speeds, greater capacity, and control over the data. The old system became obsolete in terms of capability and maintainability. New on-board avionic systems also demand that the Flight Test Instrumentation group (INSTR) accommodate fiber and high speed Ethernet data. In addition, the footprint and location for INSTR systems and components will be moved to remote areas. INSTR engineering selected the Teletronics Technology Corporation's Ethernet networked Data Acquisition Units (DAUs), known as MnDAUs, as the core system. Prior to the first flight utilization of the new INSTR DAS will undergo extensive lab and field testing to assure flight test effectiveness and the accuracy of all necessary data products. The goal is to acquire and employ the best system available while avoiding costly lessons.
    • A Model for Cyber Attack Risks in Telemetry Networks

      Dean, Richard; Moazzami, Farzad; Astatke, Yacob; Shourabi, Neda Bazyar; Morgan State University (International Foundation for Telemetering, 2015-10)
      This paper develops a method for analyzing, modeling and simulating cyber threats in a networked telemetry environment as part of a risk management model. The paper includes an approach for incorporating a Monte Carlo computer simulation of this modeling with sample results.
    • INCA Cubesat: A Design Analysis of the Telemetering System

      Burgett, Taylor; New Mexico State University (International Foundation for Telemetering, 2015-10)
      The goal of this project is maximize the performance of the telemetering system for the INCA cubesat mission using what we are learning in class to develop tests to figure out the optimal selection of frame scheme, data rate, and modulation technique based on the requirements of the mission. This project will help me learn about different modulation techniques and give me real world experience testing a telemetry system. I will evaluate my results through a comparison of the error rates for the different modulation schemes and do statistical analysis to show the reliability of the data. The results will be useful to any future mission that implements the same satellite communication system including future missions at NMSU.
    • Spatial Diversity Combining Using Blind Estimation Techniques

      Ardrey, David; Gimler, Gregory; Pippitt, Mark; MIT Lincoln Laboratory (International Foundation for Telemetering, 2015-10)
      This paper proposes a spatial diversity combining approach by which spatially diverse telemetry signals from multiple antennas are combined before they are demodulated. The combined signal is guaranteed to at least replicate and in many cases improve upon the performance of any single antenna. By taking advantage of blind channel estimation, the combined signal can be computed as a time varying weighted sum of digital I and Q samples from multiple antennas. Multiple antenna combining is enabled by improved computation capability, high speed network connectivity, and accurate clock synchronization. The algorithm will be demonstrated at the Reagan Test Site (RTS), whose modernization program encompasses multiple antenna sites with network capability and a state of the art software defined radio back end. This paper details the spatial diversity combining algorithm and discusses its merits and challenges. Index Terms - Telemetry, Reagan Test Site, blind estimation, multiple antenna combining, best source selection, spatial diversity combining.
    • A Brave New C Band Architecture

      Guadiana, Juan M.; Uhl, Brecken; Rigil Corporation; Scientific Value LLC (International Foundation for Telemetering, 2015-10)
      This paper looks at the migration paradox from a holistic perspective, revisits the Smarter Antenna concept and looks for synergetic solutions. The architecture presented also builds on the momentum of the relentless migration to network technology (that has already transformed telemetry data centers) and pushes it to the vehicle. The results are reduced costs and exciting new functionality, such as better situational awareness for mission conduct and range safety. Spatial and temporal domains are harnessed as aggressively as the frequency domain to enable denser spectral utilization and other exciting benefits. Imagine a Test Range no longer reliant on tracking systems (almost)!
    • Ultrasonic Transmitter Implemented on Arduino with Direct Digital Synthesis

      Owen, Jonathan; Ravenscroft, Brandon; Gustafson, Kai; Hellberg, Amanda; University of Kansas (International Foundation for Telemetering, 2015-10)
      Ultrasonic frequency signals can be employed in a manner similar to radio frequency signals for target detection and ranging by utilizing concepts from radar systems. This project uses components operating in the ultrasonic frequency spectrum to transmit and receive signals for detection and ranging. The project concept contains a single channel ultrasonic transmitter and a single channel ultrasonic receiver. An Arduino Due microcontroller is used to coordinate the radar system. The radar transmitter is continuously transmitting chirp waveforms in a frequency sweep pattern from 30 kHz to 50 kHz. Chirp echoes are received by the ultrasonic microphone. The echoes are mixed with the originally transmitted chirp, which creates a beat frequency response. The beat frequency is used to calculate the range of the target.
    • Results for Precise GPS Trajectography Computation without Base Station

      Morán, Guillermo Martinez; Airbus Defence and Space (International Foundation for Telemetering, 2015-10)
      The use of differential GPS post-procesing for precise trajectography computation has been widely used since early 90s. Up to recent dates, installation of a GPS receiver in a well known position (base station) has been mandatory. Operating range from this base station varies from 50 km up to 100 km, depending on the accuracy required, which impose single or dual frequency GPS technique. Nowadays, the huge amount of GPS base stations continuous logging data worldwide have allowed to improve the error models a lot. Using these precise models, it is possible to achieve centimeter accuracy in GPS trajectography by using only one GPS receiver without range to a base station restrictions. This technique is called Precise Point Positioning (PPP). The performance results for PPP obtained after a real 10 flights campaign will be presented.
    • EVTM (Ethernet-Via-Telemetry): Get Ethernet Packetized Data Directly from Your Test Article

      Schultz, Matt; Quasonix (International Foundation for Telemetering, 2015-10)
      This article defines the system design for translating burst Ethernet packetized data into a constant rate serial data stream suitable for transmission over standard telemetry hardware physical links. The system supports both unidirectional (UDP) and bidirectional (TCP/IP, etc.) communications. This paper will evaluate the capabilities and limitations of the established fielded hardware, as well as possibilities for system growth (IRIG Chapter 10 compatibility).
    • Synchronized Data Transportation for Distributed Acquirement System Through Direct Ethernet Connection and TDM

      Wan, Zhongjie; Qi, Shengyuan; Song, Jian; Wang, Haijiao; China Flight Test Establishment; Beijing Zoweetech Ltd. (International Foundation for Telemetering, 2015-10)
      To use Ethernet is the most convenient way to set up a transportation network for a telemetry data acquirement system. However, due to its CSMA/CD (Carrier Sense Multiple Access and Collision Detection) mechanics, Ethernet cannot transport data synchronously. This paper analyzed important features of transportation in a distributed data acquirement system, and presents a resolve for synchronously transporting data in a distributed data acquirement system by using direct Ethernet connection and TDM (time division multiplexing) technique.