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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Non-Traditional Uses of the CCSDS Space Link Extension (SLE) Protocol

Safigan, Brian, Lokshin, Kirill, Puri, Amit 10 1900 (has links)
ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, California / Space Link Extension (SLE) is a set of Consultative Committee for Space Data Systems (CCSDS) recommended standards for extending the space link from ground stations to other spaceflight mission ground facilities over a ground network, allowing distributed access to space link telecommand and telemetry services. The currently defined and implemented SLE recommendations are oriented around a traditional CCSDS telecommand and telemetry protocol set, which uses discrete telecommand frames that are encapsulated in Communication Link Transmission Units (CLTUs) for transport over the ground segment, and telemetry data encapsulated in Transfer Frames at the spacecraft. This paper discusses several non-traditional uses of the SLE services. The applications addressed within lie outside the discrete packet telecommand/telemetry subset of the SLE recommendations that are fully defined by CCSDS. This paper will focus on the use of the currently implemented SLE model to enable the transport of other forms of data, which may be subject to various transmission constraints, across the ground segment.
2

"Don't Leave the Pad Without It": Using Deployable Assets to Conduct Pre-Launch and On-Orbit Testing

Morimoto, Todd, Sargent, Cliff 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / When hundreds of millions of dollars are invested in building, launching, and command/control of modern military space systems, the developers and operators need assurance that when their system achieves orbit, it will be able to "talk" with the ground network, exchanging commands, telemetry and ranging signals. Furthermore, prior to launch they need proof of compatibility with the ground data systems, showing that operational ground-based crypto keys, database parameters, and processing software are in-fact compatible with the spacecraft. This paper describes Air Force Materiel Command (AFMC), Space & Missile Center (SMC) Detachment 2's four classes of deployable test assets, emphasizing deployable's contribution to successful on-orbit performance. With not only the huge dollar investment, but even more important, the ability to execute a vital test or operational mission riding on compatibility, and launch vehicle and on-orbit test and evaluation operations the watchwords are "Don't leave the pad without it."

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