• DERIVED PARAMETER IMPLEMENTATION IN A TELEMETRY PREPROCESSOR

      Bossert, Kathleen B.; Loral Data Systems (International Foundation for Telemetering, 1992-10)
      Today’s telemetry preprocessing systems are often required to create and process new telemetry parameters by combining multiple actual parameters in a telemetry data stream. The newly created parameters are commonly referred to as “derived parameters” and are often required for analysis in real time at relatively high speeds. Derived parameters are created through algebraic or logical combinations of multiple parameters distributed throughout the telemetry data frame. Creation and processing of derived parameters is frequently performed in telemetry system preprocessors, which are much more efficient at processing time division multiplex data streams than general purpose processors. Providing telemetry system users with a “user friendly” method for creating and installing newly derived parameter functions has been a subject of considerable discussion. Successful implementation of derived parameter processing has typically required the telemetry system user to be knowledgeable of the telemetry preprocessor architecture and to possess software programming skills. An innovative technique which requires no programming language skills is presented in this paper. Programmers or non-programmers may use the technique to easily define derived parameter calculations. Both single derived parameters and multiple derived parameters may be calculated in the preprocessor at high throughput rates.
    • DIGITAL TAPE RECORDING IN AN AIRBORNE DATA ACQUISITION SYSTEM

      Coonce, Kenneth G.; Strahmann, Jens; Loral Data Systems; Deutsche Airbus (International Foundation for Telemetering, 1992-10)
      This paper describes the functionality of an airborne telemetry system which collects data from standard PCM, MIL 1553 and ARINC data sources and records this data to an AMPEX DRCSi Digital Tape Recorder while supporting concurrent realtime data processing and display functions. The system includes data acquisition equipment, digital to analog capability, data simulation and a wide range of data preprocessing capability. Emphasis is given to the implementation of the AMPEX recorder interface. The entire system is composed of data acquisition equipment to directly input measurements, a telemetry front end to collect PCM, MIL 1553 and ARINC 429 & 561 data, a host computer to control and monitor the setup, recording and distribution of data and a pair of high resolution color workstations for operator control and data display. This equipment is housed within a single, military-type electronic enclosure which is loaded into the cargo bay of the aircraft as a single unit and manned by two people during flight. The Digital Tape Recorder provides for a large data capacity and very high data rates. Special I/O requirements, data rates and data selection options are discussed. Consideration is given for the best test flight utilization of the AMPEX recorder in both acquisition and playback modes.
    • Distributed Systems Integration and Implementation Techniques in a Network Based Telemetry System

      Kelley, Jeffrey D.; Loral Data Systems (International Foundation for Telemetering, 1992-10)
      This paper addresses the distributed systems implementation techniques used in the development of the EMR O/S90 Open Systems Telemetry System. Specifically, it presents the integration, networked load-balancing, and remote control aspects of the telemetry system which allow it to adapt to differing configurations and availability of resources.
    • How The User Relates to a Large Range Telemetry System

      Chavez, Tomas; Strock, O. Jud; White Sands Missile Range; Loral Data Systems (International Foundation for Telemetering, 1992-10)
      The Telemetry Data Handling System (TDHS) at the Telemetry Data Center in White Sands Missile Range (WSMR), New Mexico, has been in operation since January 1990. It is one of the world's largest integrated range telemetry systems, and certainly the most versatile in weapons support capability. The system supports one of the world's busiest test ranges, serving all U.S. Military Services as well as NASA and others. This paper looks at the White Sands system from the user's view, examining the ways in which it is configured for several weapons tests in a typical day, and the way in which it can run foreground launch support and background pre-launch activities simultaneously. This system has grown in functional capability since its installation, both in hardware and in software. This paper analyzes that growth to see the reasons and methods. Also, near-term additional growth is addressed.
    • An Integrated Approach to Real Time Flight Test as Seen from Down Under

      Slezak, Ken; Crouch, Viv; Loral Data Systems; Aircraft Research and Development Unit (International Foundation for Telemetering, 1992-10)
      The Aircraft Research and Development Unit (ARDU) is the flight test authority for the Royal Australian Air Force (RAAF). ARDU was born out of a requirement to handle the testing of developmental aircraft and weapons during Word War II. Its nucleus was established in 1941 and one of its first tasks was to evaluate the flying qualities and performance of captured Japanese aircraft. Today, ARDU provides "one-stop shopping" for flight testing all aircraft, weapons and systems in the RAAF and Australian Army Inventory. As directed by the RAAF, ARDU also performed flight testing on Royal Australian Navy aircraft, as well as novel and unique aircraft such as lighter-than-air and museum restored aircraft that are of historical importance.