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The Global ETD Search service is a free service for researchers
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Showing 1 to 6 of 6 (0.045 seconds)Spelling suggestions: "subject:"delay satellite"" "subject:"relay satellite""
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GROUND SUPPORT FOR THE SPACE-BASED RANGE FLIGHT DEMONSTRATION 2Burkes, Darryl A. 10 1900 (has links)
ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / The primary objective of the NASA Space-Based Range Demonstration and Certification
program was to develop and demonstrate space-based range capabilities. The Flight
Demonstration 2 flights at NASA Dryden Flight Research Center were conducted to
support Range Safety (commanding and position reporting) and high-rate (5 Mbps)
Range User (video and data) requirements. Required ground support infrastructure
included a flight termination system computer, the ground-data distribution network to
send range safety commands and receive range safety and range user telemetry data and
video, and the ground processing systems at the Dryden Mission Control Center to
process range safety and range user telemetry data and video.
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SPACE-BASED TELEMETRY AND RANGE-SAFETY STUDY TRANSCEIVER AND PHASED-ARRAY ANTENNA DEVELOPMENTWhiteman, Don, Sakahara, Robert, Kolar, Ray 10 1900 (has links)
International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The transmission of high-rate telemetry data for space-based relay systems yields unique system
requirements. The NASA Space-based Telemetry and Range-Safety (STARS) study evaluated system
design requirements during Phase-1 flight tests. STARS Phase-2 efforts include the development of a
high-rate transmitter and antenna system to demonstrate prototype system performance capabilities
and new technologies for future operational systems to be incorporated into the NASA Next
Generation Launch Technology (NGLT) vehicles. Phase-2 Range User (telemetry) system
performance requirements and a prototype implementation approach are presented.
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SPACE-BASED TELEMETRY AND RANGE-SAFETY STUDY TEST RESULTS AND FUTURE OPERATIONAL SYSTEM GOALSWhiteman, Don, Sakahara, Robert 10 1900 (has links)
International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The use of remote ground stations for telemetry data-relay in space launch applications is costly and
limits the geographic locations for launches of future Reusable Launch Vehicle (RLV) systems. The
National Aeronautics and Space Administration Space-based Telemetry and Range-Safety (STARS)
Study is investigating the use of satellite data relay systems as a replacement or supplement for
ground-based tracking and relay stations. Phase-1 of STARS includes flight testing that evaluates
satellite data-relay feasibility, defines satellite system performance limitations, and generates
requirements for the development of future satellite telemetry data relay systems. STARS Phase-1
ground-test results and goals for the Phase-2 system development and flight-testing are also
presented.
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NON-GIMBALED ANTENNA POINTINGVigil, Jeannine S. 10 1900 (has links)
International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This paper details the interaction of a small satellite with a space network and estimates the number of contacts and duration of contacts between the small, spin-stabilized satellite and a TDRS satellite. The simulations were performed using Satellite Tool Kit (STK) version 3.0, an orbital analysis software program. STK was configured for the four vehicles representing the spin-stabilized satellite and three TDRS satellites, TDRS East, West, and TDRS Zone of Exclusion. A set of simulations were run in which the spinstabilized satellite was given orbital elements corresponding to an orbital altitude between 600 km and 1200 km. The orbital inclination angle for the set of simulations was also varied from 20° through 100° along with the antenna cone angle of 10° through 40° to account for the effective beamwidths. In each of the simulations, the access to each TDRS satellite in the SN constellation was examined as a function of orbital altitude, orbital inclination angle, and antenna cone angle.
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NEXT GENERATION TDRSS MA BEAMFORMING SUBSYSTEMGitlin, Thomas, Nguyen, Diem V., Harlacher, Marc, Smarrelli, Robert 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / The Tracking and Data Relay Satellite System (TDRSS) Multiple Access (MA) Return Service provides a communication path that originates at a customer platform (either a spacecraft or other type of emitter) and is routed through a geosynchronous Tracking and Data Relay Satellite (TDRS) back to a customer control center or data acquisition location. Conventional operations provide Space Network (SN) customers with MA Service based on a schedule generated from user requests. The MA Service currently provides return link telemetry services to customer platforms with real-time, playback, and science data rates up to 100 kbps. This paper describes an integrated approach, using state-of-the-art technology and fault-tolerant architecture, to develop the next generation of TDRSS MA beamforming equipment. New designs will result in significant reduction in beamformer size and cost by at least an order of magnitude relative to the current MA equipment. This new equipment will provide the potential for increased usage of TDRSS MA services. The paper describes the in-development Demand Access (DA) Return Service that provides a new class of service using next generation technology.
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Communication For a Space Sunshade SystemGranberg, Moa, Silfverberg, Nikolina January 2024 (has links)
By placing millions of space sunshades, of the order of 104 m2 at the sub-Lagrangian point L1',between the sun and Earth, solar radiation can be reduced enough to achieve the necessary temper-ature reduction to enable a slow down of the global warming. The vast amount of space sunshadesposes significant challenges on the communication system, as the probability of interference, whichcan distort information, increases with the number of simultaneously communicating units.This thesis aims to design a potential structure for the communication system that minimizesinterference as much as possible. To reduce the number of simultaneously communicating units, thesunshades are arranged in cell formation, where a mother is placed in the center with daughtersaround that only communicate with their specific cell mother. Direct communication betweenthe Earth and space sunshades is not possible as the interference from solar radiation can causesignificant distortion on the signals. Therefore, relay satellites are placed in orbit around thesub-Lagrangian point L1' at a sufficient distance to avoid the effects of solar radiation. Thus, thecommunication between the mothers and Earth is instead routed via the relay satellites. Sincecommunication between such a large number of entities in space has not been investigated before,this approach could provide a possible basic design framework for designing such infrastructure inthe future.
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