• Critical Approaches to Evaluating Student Privacy & 3rd Party Apps

      Unknown author (The University of Arizona, 2018-11-16)
      This information literacy resource was created by participants and facilitators during a workshop titled "Student privacy & third-party apps : Examining a university’s Terms of Service" at CLAPS 2018. Through reading actual contracts between technology vendors and the University or Arizona, the group of academic librarians, library administrators, and faculty developers synthesized the steps to take and information to look for in these contracts to better understand how student and worker information is collected and used by third-party vendors.
    • Proceedings of the Arizona-Nevada Academy of Science, Volume 53 (2018)

      Arizona-Nevada Academy of Science (Arizona-Nevada Academy of Science, 2018-04-21)
    • Permanent Magnet Synchronous Motor Variable Frequency Drive System

      Kosbar, Kurt; Schad, Judah; Nichols, Cameron; Brinker, Katelyn; Missouri University of Science and Technology (International Foundation for Telemetering, 2017-10)
      This paper discusses a permanent magnet synchronous motor (PMSM) variable frequency drive (VFD) system developed for an all-terrain Wifi-HaLow connected (802.11ah, 900 MHz) modular electric vehicle that competed in the Mars University Rover Challenge (URC). The quadrature axis flux linkage for each motor was estimated using on-board voltage and current measurements. A synchronous control algorithm tracked the electromagnetic operating parameters, which are highly dependent on variations in motor construction and load conditions. A feed-forward model-driven observer solution calculated flux linkage angles by direct-quadrature-zero transformation of three-phase shunt currents using DSP processors.
    • PERFORMANCE OF IEEE 802.11S FOR WIRELESS MESH TELEMETRY NETWORKS

      Kosbar, Kurt; Zawodniok, Maciej; Price, Nathan D.; Chandran, Arul Mathi Maran; Missouri University of Science and Technology (International Foundation for Telemetering, 2017-10)
      Wide area sensor networks have numerous agricultural, industrial, scientific, medical, and military applications. For many years now, such networks have been implemented through wireless mesh networks. As wireless mesh networks have come to maturity, several network standards have become readily available. The WiFi mesh extension 802.11s was finalized in 2008 and officially adopted into the 802.11 standard in 2012, is extremely interesting thanks to the wide spread adoption of WiFi and low cost. In this paper, we evaluate the performance of a small 802.11s net-work implemented on low-cost, off-the-shelf single board computers for the purpose of building a telemetry sensor network.
    • THE TENA AND JMETC SOLUTION FOR TELEMETRY IN DISTRIBUTED RANGES AND FACILITIES

      Hudgins, Gene; Secondine, Juana; TENA Software Development Activity (SDA) (International Foundation for Telemetering, 2017-10)
      TENA and JMETC enable interoperability among Telemetry Instrumentaion (TM) ranges, facilities, and simulations in a timely and cost-efficient manner. TENA provides for real-time system interoperability, as well as interfacing existing range assets, C4ISR systems, and simulations; fostering reuse of range assets and future software systems. JMETC is a distributed, LVC capability which uses a hybrid network architecture; the JSN is used for secret testing and the JMN is the network solution for all classifications and cyber testing. JMETC provides readily available connectivity to the Services' distributed test and training capabilities and simulations, as well as industry resources. TENA and JMETC allow for the most efficient use of current and future TM range resources via range resource integration and remote control. This integration fosters interoperability and reuse within the test and training communities, critical to validate system performance in a highly cost-effective manner.
    • USING MLC FLASH TO REDUCE SYSTEM COST IN INDUSTRIAL APPLICATIONS

      Budd, Chris; SMART High Reliability Solutions (International Foundation for Telemetering, 2017-10)
      Storage devices based on Multi-Level Cell (MLC) NAND flash can be found in almost all computer systems except rugged, industrial systems; even though MLC is less expensive and more dense than devices based on standard Single-Level Cell (SLC) NAND flash, MLC’s lower write endurance and lower retention has led system designers to avoid using it. This avoidance is unnecessary in many applications which will never come close to the endurance limits. Furthermore, new processes are leading to storage devices with higher write endurance. System designers should review the specific use-model for their systems and can select MLC-based storage devices when warranted. The result is lower system costs without worry of data loss due to write endurance.
    • COMPARING COMMERCIAL AND T&E SPECTRUM METRICS

      Jones, Charles H.; Painter, Michael K.; C. H. Jones Consulting, LLC; Knowledge Based Systems, Inc. (International Foundation for Telemetering, 2017-10)
      There is an ongoing need to understand how spectrum is used. In the context of defending T&E use against commercial encroachment, there is a recurring question of how commercial use compares to T&E use. This comparison is complicated by the lack of consistent definitions of the terms “use” and “efficiency” as well as different requirements of these distinctly different applications. The International Telecommunications Union (ITU) recommendations lay out a foundation of spectrum metrics as applied to different applications. The RCC 707 Spectrum Management Metrics Standard provides a T&E perspective. Some insight about commercial metrics can be obtained through an internet search. This paper combines these resources to provide a coherent approach to understanding how to compare spectrum use within these different applications and how this affects the ability to defend against telemetry spectrum encroachment.
    • EFFECTS OF AERONAUTICAL CHANNEL DYNAMICS ON THE PERFORMANCE OF LINK DEPENDENT ADAPTIVE RADIO (LDAR)

      Alam, Tasmeer; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      This paper includes aeronautical channel dynamics in the flight simulations of the Link Dependent Adaptive Radio (LDAR) for realistic measurement of the throughput gain with the adaption of the modulation and coding parameters for aeronautical telemetry. Previously, the LDAR flight simulator used a fixed channel for different phases of the flight. This paper shows the performance of LDAR using a dynamic channel created by the customized two ray channel model considering delay spread, Doppler and other channel dynamics. The merger of such dynamic channel simulator with the LDAR flight simulator could help the telemetering community by providing reliable simulation results before test flights.
    • DEFENDING T&E SPECTRUM THROUGH AUTOMATED FREQUENCY MANAGEMENT METRICS CALCULATION

      Painter, Michael K.; Fernandes, Ronald; Madanagopal, Karthic; Jones, Charles H.; Knowledge Based Systems, Inc.; C. H. Jones Consulting, LLC (International Foundation for Telemetering, 2017-10)
      Because of its economic value, there has been growing pressure to sell off spectrum currently allocated for defense purposes. These pressures come at a time when Department of Defense (DoD) spectrum needs are growing at an exponential pace, thus prompting heightened efforts to clearly demonstrate both the need and the responsible, efficient use of electromagnetic spectrum. In response, the DoD has developed a baseline set of standard metrics to measure spectrum utilization, demand, efficiency, and operational effectiveness. The focus has now shifted toward developing the automated tools to calculate, plot, and display these metrics. The purpose of this paper is to describe progress toward developing a Spectrum Management Metrics Toolkit (SMMT) to fill this need and its potential role in helping to analyze and defend Test and Evaluation (T&E) spectrum usage and needs.
    • PERFORMANCE EVALUATION FOR DECISION-FEEDBACK EQUALIZER WITH PARAMETER SELECTION ON UNDERWATER ACOUSTIC COMMUNICATION

      Nassr, Husam; Kosbar, Kurt; Missouri University of Science and Technology (International Foundation for Telemetering, 2017-10)
      This paper investigates the effect of parameter selection for the decision feedback equalization (DFE) on communication performance through a dispersive underwater acoustic wireless channel (UAWC). A DFE based on minimum mean-square error (MMSE-DFE) criterion has been employed in the implementation for evaluation purposes. The output from the MMSE-DFE is input to the decoder to estimate the transmitted bit sequence. The main goal of this experimental simulation is to determine the best selection, such that the reduction in the computational overload is achieved without altering the performance of the system, where the computational complexity can be reduced by selecting an equalizer with a proper length. The system performance is tested for BPSK, QPSK, 8PSK and 16QAM modulation and a simulation for the system is carried out for Proakis channel A and real underwater wireless acoustic channel estimated during SPACE08 measurements to verify the selection.
    • LINK DEPENDENT ADAPTIVE RADIO – DESIGN FOR iNET

      Moazzami, Farzad; Dean, Richard; Alam, Tasmeer; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      This paper focuses on the design of a simple Time Division Multiple Access (TDMA) signaling structure for the Link Dependent Adaptive Radio (LDAR) prototype wireless radio communication system to meet the timing requirements of the iNET standard. Built for aeronautical telemetry, LDAR adapts its modulation and coding scheme based on the channel condition in real time. In this paper, a simple protocol for transmission of Command Message and Data Message between Ground Station and Test Article is discussed. This protocol includes all analysis for the continuous adaptation of modulation scheme and coding rate to maximize throughput while ensuring a minimum level of link quality. This project was a collaborative effort between Morgan State University and Georgia Tech Research Institute and is a continuation of our previously published work on LDAR.
    • HIGH-G SURVIVABILITY OF AN UNPOTTED ON-BOARD RECORDER

      Granitzki, Richard F.; Weinhold, Douglas; US Army Armament Research Development and Engineering Center, Telemetry Branch (International Foundation for Telemetering, 2017-10)
      On-Board Recorders (OBRs) provide developers with data from sensors and computers by storing the data to memory devices contained within it’s on board electronics system. At the expense of recovery, reusable OBRs provide projects with cost savings in terms of upfront non-recurring engineering, unit costs savings, and reduced field support setups. In this paper, the ARRT-158 OBRs used within artillery munitions systems to capture interior and exterior ballistics sensor and mission computer data will be discussed.
    • WRITING BETWEEN THE LINES – THE STORY OF SPECTRUM AGGREGATION

      Wigent, Mark; Laulima Systems (International Foundation for Telemetering, 2017-10)
      In order to meet the increasing demand for spectrum to support future DoD test and evaluation (T&E) requirements in an environment of decreasing spectrum availability, the DoD requires new spectrum aggregation and spectrum management technologies. Advanced radio technologies that sense and aggregate non-contiguous blocks of spectrum into a larger communication channel capable of supporting higher user data rates are needed. Moreover, the T&E community must more effectively manage and use the spectrum that is available to it, and utilize new paradigms in which spectrum is dynamically allocated on a non-interference basis to multiple, concurrent users and in a way that meets both planned and unplanned changes to mission requirements, and real time channel conditions, factoring in both Federal and non-Federal users of spectrum. The objective of the Adaptive Spectrum Aggregation and Management (ASAM) project is to develop technologies that will sense available spectrum, aggregate white space within fragmented frequency bands to create communication channels, and dynamically allocate those channels across multiple range users using algorithms that increase spectrum utilization and efficiency while applying policy constraints. The ASAM project is sponsored by the Test Resource Management Center (TRMC) and was awarded in 2016 through the National Spectrum Consortium. This paper will describe the ASAM project and technical challenges associated with its development.
    • AN EXPANDED COMMUNICATIONS SYSTEM FOR OFF-GRID TELEMETRY

      Marcellin, Michael; Boyer, Kyle; Brubaker, Laura; Everly, Kyle; Herriman, RIchard; Houston, Paul; Ruckle, Sean; Scobie, Rory; Ulanday, Ian (International Foundation for Telemetering, 2017-10)
      The drivers of the University of Arizona Baja racing team must be intensely focused on tackling the jumps, boulders, mud bogs, and other challenges in the four-hour endurance race. These obstacles are just as demanding on the vehicle as the driver, so the pit crew needs effective ways of detecting problems within the vehicle before serious damage occurs. Our solution is a wide range, AES encrypted, Wi-Fi communications system that supports full IP protocol and live video feed, allowing our telemetry data to be accessed through a smartphone via a web interface. To provide a wide range of communication options, our system supports VOX and push-to-talk audio compatible with third-party radios, and has an on-board HDMI screen for text-based communications. Finally, our system is backwards compatible with prior generations to make repairs and replacements easy.
    • OVERVIEW OF SECURE COGNITIVE RADIO MAC PROTOCOL IN THE PROPOSED 3.5 GHZ BAND

      Dean, Richard; Moazzami, Farzad; Oyediran, David; Morgan State University, Electrical and Computer Engineering Department (International Foundation for Telemetering, 2017-10)
      Spectrum sharing between federal and commercial users is proposed by the FCC and NTIA to open up the 3.5 GHz band for wireless broadband use. The proposed technology requires the detection and subsequent allocation of available licensed spectrum for temporary use by other users without compromising the privacy of the licensed user. DoD has a documented requirement of 865 MHz by 2025 to support telemetry but only 445 MHz is presently available. Research is presently on-going at DoD to realize, test and evaluate spectrum efficient technology with the aim to develop, demonstrate, and evaluate technology components required to enable flight and ground test telemetry operations. The use of cognitive radio (CR) in spectrum sharing has gained much popularity in that CR senses the unused spectrum at a specific time and location and dynamically allocates to users as required. This paper will provide an overview of a secured CR Media Access Protocols using the IEEE 802.22. Carrier Sense Multiple Access Collision Avoidance (CSMA/CA) will be utilized for protocol transmission in order to properly identify user’s location and identity thereby providing a secured network against false alarm from external attack.
    • A TRADE STUDY TO DETERMINE THE BEST LOCATION FOR TM RECEIVERS

      Diehl, Michael; Fraser, Ryan; Green, Jonathan; Swain, Jason; Air Combat Systems Directorate, U.S. Army Yuma Proving Ground (International Foundation for Telemetering, 2017-10)
      As part of a larger effort to improve telemetry link availability, the U.S. Army Yuma Proving Ground (YPG) is currently in the process of upgrading its telemetry receivers. As YPG begins integrating new receivers into existing range infrastructure, the question of where to place these receivers to provide maximum benefit must be considered. Should the receivers be placed at each of the remote antennas or should they be centrally located at the primary telemetry site? Although many Telemetry-over-Internet Protocol (TMoIP) and radio frequency (RF) over fiber solutions exist to transport these data, there are numerous concerns including network and Cybersecurity limitations to consider when implementing either of these approaches. This paper will document the trade study conducted at YPG to explore the benefits of each approach.
    • MULTIHOP ROUTING OF TELEMETRY DATA IN DRONE SWARMS

      Rohrer, Justin P.; Pospischil, Alexis; Department of Computer Science, Naval Postgraduate School (International Foundation for Telemetering, 2017-10)
      In 2015, a group of Naval Postgraduate School (NPS) professors and students set the record for largest fixed-wing unmanned aerial vehicle (UAV) swarm flown at one time. The swarm had 50 vehicles flying simultaneously and successfully demonstrated distributed decision-making with all processing occurring on swarm vehicles rather than a centralized control station. Much of the decision-making is based on telemetry data that is continuously streamed from all the nodes. At that time all telemetry data was broadcast in a single-hop radio environment using 802.11 in AdHoc mode. In the future, drone swarm distribution and mobility patterns will necessitate multi-hop communications for this telemetry data. This paper models the network currently used by the NPS drone swarm as well as potential future topologies and evaluates candidate multihop routing protocols for this application.
    • AUTONOMOUS GROUND RECONNAISSANCE DRONE USING ROBOT OPERATING SYSTEM (ROS)

      Marcellin, Michael W.; Hung, David; Tang, Cinthya; Allred, Coby; McKeever, Kennon; Murphy, James; Herriman, Ricky; Univ Arizona, Dept Elect & Comp Engn (International Foundation for Telemetering, 2017-10)
      The Arizona Autonomous Club is a student organization at the University of Arizona which designs, builds, and competes with Unmanned Air Systems (UAS). This year, a 25% scale Xtreme Decathlon model aircraft was selected and successfully converted into a fully autonomous UAS for the AUVSI Student Unmanned Aerial Systems (SUAS) 2017 competition. The UAS utilizes a Pixhawk autopilot unit, which is an independent, open-hardware project aiming at providing high-end autopilot hardware at low costs and high availability. The Pixhawk runs an efficient real time operating system (RTOS) and includes sensors such as a GPS unit, IMUs, airspeed, etc. The UAS also includes an onboard imaging system, which is controlled by an onboard computer (OBC). The Pixhawk and OBC are interconnected with two ground control stations (GCS) using the Robot Operating System (ROS) framework, which is capable of extending overall system capabilities to include an expanded telemetry downlink, obstacle avoidance, and manual overrides.
    • NEAR-FIELD HOMING AND GUIDANCE PLANNING FOR AUTONOMOUS NAVIGATION SYSTEMS

      Lee, Hua; Radzicki, Vincent R.; Rhajagopal, Abhejit; UCSB, Dept Electrical & Comp. Eng. (International Foundation for Telemetering, 2017-10)
      Advances in planning and controls algorithms for Unmanned Autonomous Vehicles (UAVs) have led to a substantial increase in a wide variety of applications. An important task for UAVs is au-tomated high-precision homing-and-docking. This requires the UAV to autonomously estimate its relative bearing to the home docking station and plan its optimal approach accordingly. This paper presents the design of homing and navigation system for UAVs that can operate in near-field scenarios. The system incorporates a dual-transmitter/receiver design and through a modified angle of arrival and motion estimation routine, the UAV can determine its relative bearing to the homing station while simultaneously planning the optimal approach. The approach planning algorithm will be described, along with theoretical analysis and simulated results documenting its performance in comparison to other techniques.
    • Telemetry Range Support Aircraft (TRSA) Program Providing the Navy with Next Generation TM and Range Support

      Roudebush, J. Kyle; Hernandez, Jose; Kujiraoka, Scott; Sanchez, Kenneth; NAVAIR (International Foundation for Telemetering, 2017-10)
      The aircraft currently being used to support the Navy’s mission of Telemetry Reception, Range Safety as well as Range Surveillance/Clearance are reaching the end of their useful life. As a result, there are ongoing efforts to procure a new aircraft and integrate these mission systems in order to continue the support of critical Naval Test Range operations. This paper will detail the current efforts being undertaken to upgrade a Gulfstream 550 to perform Range Support missions for the Multi-service Government Test Ranges.