• VEHICLE MONITORING SYSTEM VIA GPS, GIS AND GPRS

      Lei, Huang; Qishan, Zhang; Xingjian, Huang; Beihang University (International Foundation for Telemetering, 2003-10)
      Vehicle Monitoring System (VMS) has being introduced into the world marketplace with the hope that it will help alleviate traffic congestion and the associated environmental pollution. In this paper we give an overview of system composition and principle of the VMS and several communications link solutions in China. We review technologies and focus on the key technological issues about the integration of VMS with the GPRS wireless mobile network and the Internet.
    • ACQUISITION AND DISTRIBUTION OF TSPI DATA USING COTS HARDWARE OVER AN ETHERNET NETWORK

      James, Russell W.; Bevier, James C.; James Bros. Systems, Inc.; National Aeronautics and Space Administration; JB Systems (International Foundation for Telemetering, 2003-10)
      The Western Aeronautical Test Range (WATR) operates the ground stations for research vehicles operating at the NASA Dryden Flight Research Center (DFRC). Recently, the WATR implemented a new system for distributing Time, Space, and Position Information (TSPI) data. The previous system for processing this data was built on archaic hardware that is no longer supported, running legacy software with no upgrade path. The purpose of the Radar Information Processing System (RIPS) is to provide the ability to acquire TSPI data from a variety of sources and process the data for subsequent distribution to other destinations located at the various DFRC facilities. RIPS is built of commercial, off the shelf (COTS) hardware installed in Personal Computers (PC). Data is transported between these computers on a Gigabit Ethernet network. The software was developed using C++ with a modular, object-oriented design approach.
    • ADVANCED GPR SYSTEM FOR HIGH-PERFORMANCE TOMOGRAPHIC SUBSURFACE IMAGING

      Ono, Sashi; Lee, Hua; University of California, Santa Barbara (International Foundation for Telemetering, 2003-10)
      In this paper, the research prototype of a high-performance GPR imaging system is presented. The system is equipped with the capability of synthetic-aperture scan, stepfrequency FMCW illumination, and high-resolution tomographic image reconstruction.
    • NPP IN-SITU GROUND SYSTEM - BRIDGING TECHNOLOGIES BETWEEN EOS, NPP AND THE FUTURE

      Brentzel, Kelvin; Harris, Carol; Coronado, Patrick; Global Science & Technology; NASA (International Foundation for Telemetering, 2003-10)
      As part of the National Polar-orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP), the Direct Readout Laboratory (DRL) of NASA/GSFC Code 935, is developing the prototype NPP In-Situ Ground System (NISGS). The NISGS supports earth remote sensing, and its functions bridge from all EOS satellites to planning for future NASA and interagency launches. The NISGS solution enables the end user to acquire and process NPP and predecessor instrument data, and provide a means to make these technologies and data products available to the Direct Broadcast Community. This document describes the NISGS model, methodology, and system architecture.
    • ACHIEVING DATA TRANSFER AND SERVICE MANAGEMENT INTEROPERABILITY IN SATELLITE CONTROL NETWORKS

      Sunshine, Carl; Williams, Lance; The Aerospace Corporation; Northrop Grumman (International Foundation for Telemetering, 2003-10)
      A critical area for achieving interoperability between satellite control networks is the means chosen to interconnect Satellite Operations Centers and remote antenna systems. The CCSDS Space Link Extension (SLE) services are good candidates for this purpose, but national security space activities have demanding requirements for accuracy of data transfer, controlled delay, and security, which may not be fully achievable with the existing recommendations. The US Air Force developed a test bed to evaluate the SLE protocols during live satellite contacts, for both data transfer and management functions such as scheduling, configuring ground resources, and status reporting. Performance was generally satisfactory, but several extensions were found to be necessary. The SLE services provide a promising basis for use in ground stations to support both legacy Air Force interfaces and newer standards based satellite control services.
    • AN ETHERNET BASED AIRBORNE DATA ACQUISITION SYSTEM

      Dai, Jiwang; DeSelms, Thomas; Grozalis, Edward; L3 Communications; Veridian Engineering (International Foundation for Telemetering, 2003-10)
      There is growing interest in the airborne instrumentation community to adopt commercial standards to obtain scalable data rates, standards based interoperability, and utilization of Commercial Off The Shelf (COTS) products to reduce system costs. However, there has been few such data acquisition systems developed to date. L-3 Telemetry East has developed a prototype called the Network Data Acquisition System (NetDAS), which is based on the 10/100 Base-T Ethernet standard, TCP/UDP/IP network protocols and an industrial Ethernet switch. NetDAS has added network capability to the legacy MPC-800 telemetry system by replacing the existing formatter module with a formatter/controller based on a COTS CPU module and a custom designed bridge module. NetDAS has demonstrated transmission bit rates as high as 20 Mbps from a single unit using UDP/IP and an Ethernet switch. The NetDAS system has also demonstrated scalable and distributed architecture.
    • REFERENCE ARCHITECTURE FOR SPACE DATA SYSTEMS

      Shames, Peter; Yamada, Takahiro; California Institute of Technology; Institute of Space and Astronautical Science (International Foundation for Telemetering, 2003-10)
      This paper introduces the Reference Architecture for Space Data Systems (RASDS) that is being developed by CCSDS. RASDS uses five Views to describe architectures of space data systems. These Views are derived from the viewpoints of the Reference Model of Open Distributed Processing (RM-ODP), but they are slightly modified from the RM-ODP viewpoints so that they can better represent the concerns of space data systems.
    • A CELLULAR PHONE-CENTRIC MOBILE NETWORK ARCHITECTURE FOR WIRELESS SMALL SATELLITE TELEMETRY SYSTEM

      Li, Mingmei; Guo, Qing; Harbin Institute of Technology (International Foundation for Telemetering, 2003-10)
      This paper aims to add the information access capabilities to enable user’s mobile terminals in a wireless small satellite telemetry system. The cellular phone-centric mobile network architecture provides wireless communication link; telemetry information is provided to users in a highly personalized form according to the end-user’s range. We choose a reference system-level model of network architecture and compare its performance with common small satellite telemetry network link; evaluation results derived using a known analytical model. The result of original hypotheses, network architecture’s prototype includes both analytical performance evaluation and simulation techniques, are discussed in detail.
    • Space-Time Coding for Avionic Telemetry Channels

      Wang, Jibing; Yao, Kung; Whiteman, Don; University of California, Los Angeles; National Aeronautical Space Administration (International Foundation for Telemetering, 2003-10)
      Multiple antennas promise high data capacity for wireless communications. Most space-time coding schemes in literature focus on the rich scatter environment. In this paper, we argue that minimax criterion is a good design criterion for space-time codes over the avionic telemetry channels. This design criterion is different than those of space-time codes over rich scattering Rayleigh fading channels. Theoretical and numerical results show that the codes with optimal performance in Rayleigh fading channels do not necessarily have optimal performance in avionic telemetry channels. Therefore, the space-time codes should be carefully designed/selected when used in the avionic telemetry channels.
    • TRANSPARENT SATELLITE BANDWIDTH ACCELERATION

      Gudmundson, Stephan; NetAcquire Corporation (International Foundation for Telemetering, 2003-10)
      While the transition to IP internetworking in space-based applications has a tremendous upside, there are significant challenges of communications efficiency and compatibility to overcome. This paper describes a very high efficiency, low-risk, incremental architecture for migrating to IP internetworking based on the use of proxies. In addition to impressive gains in communications bandwidth, the architecture provides encapsulation of potentially volatile decisions such as particular vendors and network technologies. The specific benchmarking architecture is a NetAcquire Corporation COTS telemetry system that includes built-in TCP-Tranquility (also known as SCPS-TP) and Reed-Solomon Forward Error Correction capabilities as well as a specialized proxy-capable network stack. Depending on network conditions, we will show that the effective bandwidth for satellite transmissions can be increased as much as a factor of one hundred with no external changes to existing internetworking equipment.
    • IEEE P1451.4 Smart Transducers Template Description Language

      Jones, Charles H.; Edwards Air Force Base (International Foundation for Telemetering, 2003-10)
      The IEEE 1451.4 smart transducer interface standard [1] provides a mechanism for both analog and digital, or mixed mode, interfacing to sensors and actuators, which are collectively referred to as transducers. The analog mode allows normal interfacing to the transducer. The digital mode is intended to provide the ‘smarts’ by allowing the transducer to provide basic information to the application system. This information is referred to as the transducer electronic data sheet (TEDS) and contains information ranging from serial number to calibration data and electrical characteristics. A major driving force behind the development of the standard was to minimize the amount of memory required to store a TEDS; with a stated objective of only needing 256 bits, although more are allowed. This requires a method of mapping the bits in a precise fashion. This bit mapping is accomplished through templates which are text based files written in the Template Description Language (TDL). The TDL is a formal language similar to programming languages, but with considerably less looping and conditional control. This is because the entire purpose of the language is to map bits and not to implement general processing or mathematical capabilities. This paper outlines the functionality and syntax of the TDL.
    • TELEMETRY IN BUNDLES: DELAY-TOLERANT NETWORKING FOR DELAY-CHALLENGED APPLICATIONS

      Burleigh, Scott; California Institute of Technology (International Foundation for Telemetering, 2003-10)
      Delay-tolerant networking (DTN) is a system for constructing automated data networks in which end-to-end communication is reliable despite low data rates, possible sustained interruptions in connectivity, and potentially high signal propagation latency. As such it promises to provide an inexpensive and robust medium for returning telemetry from research vehicles in environments that provide meager support for communications: deep space, the surface of Mars, the poles or the sub- Arctic steppes of Earth, and others. This paper presents an overview of DTN concepts, including “bundles” and the Bundling overlay protocol. One possible scenario for the application of DTN to a telemetry return problem is described, and there is a brief discussion of the current state of DTN technology development.
    • International Telemetering Conference Proceedings, Volume 39 (2003)

      International Foundation for Telemetering, 2003-10
    • CALCULATING POWER SPECTRAL DENSITY IN A NETWORKBASED TELEMETRY SYSTEM

      Brierley, Scott; The Boeing Company (International Foundation for Telemetering, 2003-10)
      Calculating the power spectral density (PSD) at the transducer or data acquisition system offers advantages in a network-based telemetry system. The PSD is provided in real time to the users. The conversion to PSD can either be lossless (allowing a complete reconstruction of the transducer signal) or lossy (providing data compression). Post-processing can convert the PSD back to time histories if desired. A complete reconstruction of the signal is possible, including knowledge of the signal level between the sample periods. Properly implemented, this method of data collection provides a sharp anti-aliasing filter with minimal added cost. Currently no standards exist for generating PSDs on the vehicle. New standards could help telemetry system designers understand the benefits and limitations calculating the power spectral density in a network-based telemetry system.
    • NETWORKED DATA ACQUISITION DEVICES AS APPLIED TO AUTOMOTIVE TESTING

      Mastrippolito, Luigi; Aberdeen Proving Ground (International Foundation for Telemetering, 2003-10)
      The US Army Aberdeen Test Center (ATC) is acquiring, transferring, and databasing data during all phases of automotive testing using networked data acquisition devices. The devices are small ruggedized computer-based systems programmed with specific data acquisition tasks and then networked together with other devices in order to share information within a test item or vehicle. One of the devices is also networked to a ground-station for monitor, control and data transfer of any of the devices on the net. Application of these devices has varied from single vehicle tests in a single geographical location up to a 100-vehicle nationwide test. Each device has a primary task such as acquiring data from vehicular data busses (MIL-STD-1553, SAE J1708 bus, SAE J1939 bus, RS-422 serial bus, etc.), GPS (time and position), analog sensors and video with audio. Each device has programmable options, maintained in a configuration file, that define the specific recording methods, real-time algorithms to be performed, data rates, and triggering parameters. The programmability of the system and bi-directional communications allow the configuration file to be modified remotely after the system is fielded. The primary data storage media of each device is onboard solid-state flash disk; therefore, a continuous communication link is not critical to data gathering. Data are gathered, quality checked and loaded into a database for analysis. The configuration file, as an integral part of the database, ensures configuration identity and management. A web based graphical user interface provides preprogrammed query options for viewing, summarizing, graphing, and consolidating data. The database can also be queried for more detailed analyses. The architecture for this network approach to field data acquisition was under the Aberdeen Test Center program Versatile Information System Integrated On-Line (VISION). This paper will describe how the merging of data acquisition systems to network communications and information management tools provides a powerful resource for system engineers, analysts, evaluators and acquisition personnel.
    • THE SPREAD-SPECTRUM MULTIPLEXING TELEMETRY SYSTEM USING PARALLEL MOVE EQUIVALENT SEQUENCE

      Wang, Yongjian; Zhao, Honglin; Zhou, Tingxian; Harbin Institute of Technology (International Foundation for Telemetering, 2003-10)
      In this paper, based on the parallel move equivalent sequence of m sequence ,one type of CDM telemetry system is issued. Also the method for anti multi-path interference(MPI) of the system is proposed and its performance is analyzed. We proved that this system not only holds the merits which are inherent in common spread-spectrum communication system, but also has better transmission efficiency.
    • Experiment Demonstrating the Use of a WLAN for Data Telemetry from Small, Fast Moving Nodes

      Bamberger, R. J.; Barrett, G. R.; D’Amico, W. P.; Lauss, M. H.; Johns Hopkins University; Yuma Test Center (International Foundation for Telemetering, 2003-10)
      This paper is a follow up to a paper presented at ITC 2002 entitled “Wireless Local Area Network for Data Telemetry from Fast Moving Nodes” by R. J. Bamberger, G. R. Barrett, R. A. Nichols, and J. L. Burbank of the Johns Hopkins University Applied Physics Laboratory, and M. H. Lauss of the Yuma Test Center at the U.S. Army Yuma Proving Ground (YPG). In that paper, network-centric data telemetry systems, specifically those based on commercial off- the-shelf (COTS) technologies such as the IEEE 802.11b Wireless Local Area Network (WLAN), were offered as an improvement over traditional frequency modulated (FM) data telemetry systems. The feasibility study of using WLANs for data telemetry considered both the radio frequency (RF) link over extended ranges and the effect due to Doppler shift. This paper describes an experiment designed to test those previous analyses.
    • DEMONSTRATION OF XML ON THE USAF E-9A AIRBORNE TELEMETRY PLATFORM USING JAVA

      Murray, Ernest; KING AEROSPACE, INC. (International Foundation for Telemetering, 2003-10)
      This paper describes the basic foundations of XML and the description of a JAVA-based eXtensible Markup Language (XML) prototype application being developed for the E-9A Airborne Telemetry Platform. In an effort to eliminate proprietary software and improve range safety data exchange, radar boat position data will be tagged with pre-defined XML tags prior to being transmitted from the E-9A. Ground Station software will then processes the XML-based boat position data to provided a means for ground station personnel to strip out data and distribute over the Internet. Leveraging XML for a telemetry application provides the ability to efficiently exchange telemetry data between users over the Internet and harness a web based standard with industry wide support.
    • RDBMS AND XML FOR TELEMETRY ATTRIBUTES

      Steele, Doug; L-3 Communications (International Foundation for Telemetering, 2003-10)
      One problem facing telemetry engineers is the ability to easily translate telemetry attributes from one system to another. Engineers must develop a written set of attributes that define a given telemetry stream and specify how the telemetry stream is to be transmitted, received, and processed. Telemetry engineers take this document and create the configuration for each product that will be exposed to the telemetry stream (airborne, ground, flight line). This process is time-consuming and prone to error. L-3 Telemetry-West chose to implement a solution using relational databases and eXtensible Markup Language (XML) to solve this and other issues.
    • AN XML SCHEMA FOR AIRBORNE TELEMETRY BASED ON THE IRIG TMATS STANDARD

      Scardello, Mike; Harris, Jim; Downing, Bob; Spiral Technology, Incorporated; NASA; Arcata Associates, Incorporated (International Foundation for Telemetering, 2003-10)
      XML is a simple and powerful way to handle on data transfers between organizations, applications and/or computer systems. Currently, there is a significant effort within NASA to transition to XML vocabularies as the means of exchanging electronic data. XML can provide a useful way to transfer telemetry attributes data between customers and systems. The current standard for airborne telemetry data description is the Telemetry Attributes Transfer Standard (TMATS). TMATS is a well-defined, structured specification that will map into XML extremely well. This makes XML an excellent choice to supplement TMATS for the interchange of telemetry attribute information. The Western Aeronautical Test Range (WATR) at NASA Dryden Flight Research Center (DFRC) is defining an XML Schema that will be used in support of the WATR Integrated Next Generation System (WINGS). This paper describes this work in progress.