CERES aqua instrument simulator for command and upload validation

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[唯一标识符]:CDSITC.AEROSPACE.A01-27116
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A2001-27116
[标题]:CERES aqua instrument simulator for command and upload validation
[作者]:Chapman John J
[书名]:IN: Sensors, systems, and next-generation satellites IV; Proceedings of the Conference, Barcelona, Spain, Sept. 25-28, 2000 (A01-27083 06-35), Bellingham, WA, Society of Photo-Optical Instrumentation Engineers (SPIE Proceedings. Vol. 4169), 2001, p. 309-3
[文摘]:Three CERES (Clouds and the Earth's Radiant Energy System) instruments are currently in orbit, one on the TRMM (Tropical Rainfall Measuring Mission) spacecraft and two on the Terra spacecraft. The Aqua/CERES is scheduled to loft two additional CERES instruments. Three CERES Instrument Simulation Systems have been built which mimic the microprocessor-controlled operational characteristics of each instrument to a high degree. The original CERES engineering development models were modified to provide the gimbaled azimuth and elevation real-time simulation in synchronization with the embedded control processors. The simulators are used to perform testing and functional validation of custom commands and command sequences prior to the actual uploading to the individual orbiting instruments. The architecture of the benchtop simulation hardware matches that of the individual instruments and each operates in conjunction with the associated unmodified flight software to assure a virtual reproduction of the performance of each instrument. Performance results of command sequences for calibration maneuvers and other simulation scenarios are presented. (Author)
[关键词]:VALIDATION ; SATELLITE BORNE INSTRUMENTS; SIMULATORS ; SYSTEMS SIMULATION; GROUND TESTS; GOVERNMENT/INDUSTRY RELATIONS; PRODUCT DEVELOPMENT
[出版年份]:2001
[专业领域]:Ground Support Systems and Facilities, Space
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[唯一标识符]:CDSITC.AEROSPACE.A93-51902
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1993-51902; Reference AN: A93-51902
[标题]:Calculation of compressible gas flow on optimal difference grids (Raschet potokov szhimaemogo gaza na optimal'nykh raznostnykh setkakh )
[作者]:KRAJNOV V A
[来源]:In:-Problems-in-the-aerodynamics-of-flight-vehicles-and-their-components-(A93-51901-22-02)
[文摘]:A modified finite difference method for solving Euler equations is proposed which is based on a lambda scheme. The method has been implemented in a program, written in FORTRAN, which can run on IBM AT-type computers. A comparison of calculation results with the available data for several test problems indicates that the method is suitable for calculating compressible flows. A similar approach can be applied to three-dimensional flows of a compressible gas. (AIAA)
[关键词]:COMPRESSIBLE FLOW; EULER EQUATIONS OF MOTION; FINITE DIFFERENCE THEORY; FLOW DISTORTION; GAS DYNAMICS; OPTIMIZATION ; THREE DIMENSIONAL FLOW
[出版年份]:1992
[专业领域]:AERODYNAMICS
[唯一标识符]:CDSITC.AEROSPACE.N89-19882
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:N1989-19882; Reference AN: N89-19882
[标题]:A methodology for automation and robotics evaluation applied to the space station telerobotic servicer
[作者]:SMITH JEFFREY H; GYANFI MAX; VOLKMER KENT; ZIMMERMAN WAYNE
[书名]:IN: NASA. Lyndon B. Johnson Space Center, 2nd Annual Workshop on Space Operations Automation and Robotics (SOAR 1988) p 471-479 (SEE N1989-19817 12-59)
[来源]:In NASA. Lyndon B. Johnson Space Center 2nd Annual Workshop on Space Operations Automation and Robotics (SOAR 1988) p 471 479 (SEE N1989 19817 12 59)
[文摘]:The efforts of a recent study aimed at identifying key issues and trade-offs associated with using a Flight Telerobotic Servicer (FTS) to aid in Space Station assembly-phase tasks is described. The use of automation and robotic (A and R) technologies for large space systems would involve a substitution of automation capabilities for human extravehicular or intravehicular activities (EVA, IVA). A methodology is presented that incorporates assessment of candidate assembly-phase tasks, telerobotic performance capabilities, development costs, and effect of operational constraints (space transportation system (STS), attached payload, and proximity operations). Changes in the region of cost-effectiveness are examined under a variety of systems design assumptions. A discussion of issues is presented with focus on three roles the FTS might serve: (1) as a research-oriented testbed to learn more about space usage of telerobotics; (2) as a research based testbed having an experimental demonstration orientation with limited assembly and servicing applications; or (3) as an operational system to augment EVA and to aid the construction of the Space Station and to reduce the programmatic (schedule) risk by increasing the flexibility of mission operations. (Author)
[关键词]:COST EFFECTIVENESS; EVALUATION ; ORBITAL ASSEMBLY; ORBITAL SERVICING; RELIABILITY ; ROBOTICS ; SPACE STATIONS; TELEOPERATORS ; AUTOMATION ; FEASIBILITY ; RISK
[出版年份]:1988
[专业领域]:MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT