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DYNAMIC RF LINK ESTIMATION FOR TELEMETRY SYSTEM OF LAUNCH VEHICLE, KSLV-IKim, Sung-Wan, Hwang, Soo-Sul, Lee, Jae-Deuk 10 1900 (has links)
ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada / This paper presents the dynamic RF link estimation result for telemetry system of KSLV (Korea
Space Launch Vehicle)-I. In particular, it utilizes the parameters of the instantaneous vehicle
antenna gain pattern in three dimensions, the improvement by polarization diversity combiner at
the ground receiver, and the free space propagation loss. The structural transformation and
discontinuity of ground plane after the separation events of nose fairing, stage, and spacecraft, are
also included in this analysis. As a consequence, the prediction of link variation has been
performed in accordance with ARDP (Antenna Radiation Distribution Plot) and look angle trace
of vehicle. In addition, the optimum position of onboard antennas has been investigated to
provide better RF link margin in the nominal trajectory.
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Geometric Model for Tracker-Target Look Angles and Line of Sight DistanceLaird, Daniel T. 10 1900 (has links)
ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NV / To determine the tracking abilities of a Telemetry (TM) antenna control unit (ACU) requires 'truth data' to analyze the accuracy of measured, or observed tracking angles. This requires we know the actual angle, i.e., that we know where the target is above the earth. The positional truth is generated from target time-space position information (TSPI), which implicitly places the target's global positioning system (GPS) as the source of observational accuracy. In this paper we present a model to generate local look-angles (LA) and line-of-sight (LoS) distance with respect to (w.r.t.) target global GPS. We ignore inertial navigation system (INS) data in generating relative position at time T; thus we model the target as a global point in time relative to the local tracker's global fixed position in time. This is the first of three companion papers on tracking This is the first of three companion papers on tracking analyses employing Statistically Defensible Test & Evaluation (SDT&E) methods.
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