Johnson, Gary G. (International Foundation for Telemetering, 1992-10)
Flight testing has dramatically changed from the freewheeling “right-stuff” aviation days of the 40s and 50s. The computer age was just beginning. There was essentially no access to data other than voice and radar tracking information on the ground to monitor the flights. The advent of reliable and effective ground systems for real-time safety monitoring was still in the future. Unfortunately, the lack of these systems played a contributing role in the large number of accidents which killed or injured a significant number of our nation’s pioneer test pilots. As technology evolved, more real-time access to critical safety and performance parameters became available to our flight test engineers on the ground. This technology included sophisticated aircraft instrumentation of key measurements, improved telemetry transmission and reception, and finally, enhanced real-time processing and display of the test data to the engineers. One advantage achieved through these technological advances in testing was a tremendous improvement in flight safety. Although accidents can still happen, today they are very rare thanks, in part, to the ability to accurately monitor and control a test program on the ground. The Advanced Data Acquisition and Processing Systems (ADAPS) program is specifically tailored to meet the needs of test engineers on the ground at the Air Force Flight Test Center (AFFTC) Edwards AFB, California, to monitor a flight through the use of state-of-the-art data acquisition, processing, and display technologies. This paper provides an overall perspective of the requirements for data processing which ADAPS addresses. In addition, the ADAPS design concept, architecture, and development plan are discussed. The purpose is to describe how the ADAPS development effort meets the flight test end user needs of the 1990s. The paper concludes with a section on how we can apply the ADAPS concepts and technology to help equip the multiple Department of Defense (DoD) test centers with a common test data processing capability.
Youssef, Ahmed H. (International Foundation for Telemetering, 1999-10)
This paper presents the future of optical networking via photonic switches as a potential replacement for the existing electronic cross-connects. Although optical amplifiers are now mainstream and wave division multiplexing (WDM) systems are a commercial reality, the industry’s long-term vision is one of the all-optical network. This will require optical switching equipment such as all-optical or “photonic” cross-connect switches that will provide packet switching at an optical layer. Currently, as voice calls or data traffic are routed throughout Range and commercial networks, the information can travel through many fiber-optic segments which are linked together using electronic cross-connects. However, this electronic portion of the network is the bottleneck that is preventing the ideal network from achieving optimal speeds. Information is converted from light into an electronic signal, routed to the next circuit pathway, then converted back into light as it travels to the next network destination. In an all-optical network, the electronics are removed from the equation, eliminating the need to convert the signals and thereby significantly improving network performance and throughput. Removing the electronics improves network reliability and restoration speeds in the event of an outage, provides greater flexibility in network provisioning, and provides a smooth transition when migrating to future optical transmission technologies. Despite the fact that photonic switching remains uncommercialized, it now seems apparent that the core switches in both the public networks and DoD Range networks of the early 21st century will probably carry ATM cells over a photonic switching fabric.
Jones, Charles H. (International Foundation for Telemetering, 2012-10)
There is a lot of talk about there not being enough spectrum available for use by either government or industry. One would thus suppose that there are clear answers to the questions, "How much spectrum is being used?" and "How much spectrum would be used if it was available?" Unfortunately, clear answers do not exist. In fact, even if you collected data, analyzed it, and generated charts, there is likely to be (and, in fact, have been) long debates about the meaning of those charts. A fundamental problem is that there are no standard metrics for reporting spectrum usage. A well-defined and documented set of metrics would aid in any analysis and discussion of spectrum usage. The Range Commander's Council (RCC) Frequency Management Group (FMG) has initiated a formal Task, FM-37, to develop and standardize a set of spectrum management metrics. These metrics will go beyond simple usage and provide metrics for analysis of spectrum management in general, such as spectrum usage requirements, scheduling efficiencies, and prediction of impacts to spectrum availability. This paper overviews an initial draft of the document being developed under Task FM-37.
Gaddis, William R. Jr; Sandland, Sawn (International Foundation for Telemetering, 1993-10)
DOD flight test centers need affordable, small-format, flight-qualified digital instrumentation recording solutions to support existing and future flight testing. The Advanced Airborne Test Instrumentation System (AATIS) is today's primary data acquisition system at the Air Force Flight Test Center (AFFTC). Digital Recorder (DR) 1995 is planned to provide full support for AATIS output capabilities and satisfy initial recording requirements for the Common Airborne Instrumentation System (CAIS). The follow-on to the AATIS, the CAIS is a tri-service development to satisfy future DOD flight test data acquisition requirements. DR 2000 is planned as the future recording solution for CAIS and will be able to fully satisfy the 50 Mbps recording requirement. In the developments of DR 1995 and DR 2000, commonality and interoperability have emerged as significant issues. This paper presents an overview of these recording solutions and examines commonality and interoperability issues.
Hoaglund, Catharine M.; Gardner, Lee S.; Bender, Victor W. (International Foundation for Telemetering, 1993-10)
The increasing complexity and volume of the information needed to support flight test missions has led to a need to expand the capability of current test data management systems. While the abilities currently exist to collect and manage calibration and telemetry information in an automated fashion, new requirements have emerged to link this data with other systems and to expand the functions and devices supported. Coordinating and directing the overall flow of information required for a successful flight test is a very big task. It calls for a view into flight test planning and scheduling activities, test objectives and methods, and the requirements for viewing and processing the test data in real-time and postflight. To meet this challenge, the Automated Test Data Management System (ATDMS) is being developed at the Air Force Flight Test Center (AFFTC), Edwards AFB, California. This paper describes the critical information and interfaces that the ATDMS will manage to bring cohesion to the management of flight test support data.
Morgan, Jon (International Foundation for Telemetering, 2000-10)
This paper presents an overview of the telemetry attributes management system used to support the Advanced Data Acquisition and Processing System (ADAPS) at the Air Force Flight Test Center (AFFTC). The Joint Test Data Management System is an object-oriented system used to store telemetry attributes. JTDMS accepts telemetry attributes in a variety of formats and provides setup files for the ADAPS system.
Painter, Michael K.; Fernandes, Ronald; Vadakkeveedu, Kalyan; Jones, Charles H. (International Foundation for Telemetering, 2011-10)
Current real-time data communications links supporting Major Range and Test Facility Base (MRTFB) operations are one-way, dedicated links based on the IRIG 106 standard. One of the goals of the iNET program is to provide for shared, two-way networked communications links enabling more flexible operation and more efficient use of spectrum. Central to this goal is the provision for a Spectrum Assignment Manager (SAM) as referred to in the iNET architecture. The SAM element of the Resource Management Facility (RMF) works in concert with the TmNS Network Manager to support dynamic frequency assignment and real-time metrics adjustment. This paper describes the potential role, key functions, and technology elements needed to support this important function.
Rush, David; Hafner, F. W. (Bill); Humphrey, Patsy (International Foundation for Telemetering, 1999-10)
Standards lead to the creation of requirements listings and test verification matrices allow developer and acquirer to assure themselves and each other that the requested system is actually what is being constructed. Further, in the intricacy of the software test description, traceability of test process to the requirement under test is mandated so the acceptance test process can be accomplished in an efficient manner. In the view of the logistician, the maintainability of the software and the repair of fond faults is primary, while these statistics can be gathered by the producer to ultimately enhance the Capability Maturity Module (CMM) rating of the vendor.
Laird, Daniel T. (International Foundation for Telemetering, 1998-10)
A simplex or ‘passive’ continuous wave and monopulse seeker tracks specific attributes of a target’s radio frequency (RF) radar return in some coordinate frame. In particular, a return carries dynamic information in amplitude (ω) and frequency (ω) at some point in azimuth (r,θ) and elevation (r,θ) planes. A passive seeker requires an illuminator beam, I(ω,φ,θ), and may require a frequency modulation on the illuminator. To model a simplex target return, we have based the dynamics on a point source radar cross section (RCS) along a line of sight (LoS) radial. The Az and El angles are equivalent to antenna placement, the attenuation and frequency dynamics are modeled in commercial off-the-shelf (COTS) software.
Berard, Alfredo J.; Chalfant, Tim; Lloyd, Joe; Small, Marty; Buckley, Mark; Bagó, Balázs; Lockard, Michael (International Foundation for Telemetering, 2002-10)
For the last 30 years Magnetic Tape Systems have been the primary means of recording data from airborne instrumentation systems. Increasing data rates and harsh environmental requirements have often exceeded the ability of tape-based systems to keep pace with platform technology. This paper examines operational and data reduction benefits when employing the IRIG 106 Chapter 10 Solid State Recorder Standard introduced by the Range Commanders Council (RCC) Telemetry Group (TG). The Standard and this paper address media formatting, data formatting for a variety of different data types, data downloading, and data security, along with serial command and control and discrete command and control of the recorder. This paper also addresses software data processing and raw data reconstruction of Chapter 10 data.
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