5,911 to 5,920 of 6,770 Results
Aug 16, 2004
Johnson, Wyatt R., 2004, "SIM trajectory design", https://hdl.handle.net/2014/38850, AIAA/AAS Astrodynamics Specialist Conference, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
SIM (Space Interferometry Mission) is a mission scheduled to launch in 2010 and will be the first spacecraft to use interferometry to measure the positions of stars to within 1 micro-arcsecond – a degree of precision never to before achieve. The flight hardware required to achiev... |
Aug 16, 2004
Ruiz, Ian B.; Burke, Gary R.; Lung, Gerald; Whitaker, William D.; Nowicki, Robert M., 2004, "Open-systems architecture of a standardized command interface chip-set for switching and control of a spacecraft power bus", https://hdl.handle.net/2014/38840, UNKNOWN, JPL Open Repository
The Jet Propulsion Laboratory (JPL) has developed a command interface chip-set that primarily consists of two mixed-signal ASICs’; the Command Interface ASIC (CIA) and Analog Interface ASIC (AIA). The Open-systems architecture employed during the design of this chip-set enables i... |
Aug 16, 2004
Lou, Michael; Fang, Houfei; Yang, Bingen, 2004, "Development of new modeling and analysis tools for solar sails", https://hdl.handle.net/2014/39971, AIAA Guidance, Navigation and Control Conference, Providence, Rhode Island, August 16, 2004., JPL Open Repository
Existing finite-element-based structural analysis codes are ineffective in treating deployable gossamer space systems, including solar sails that are formed by long spacedeployable booms and extremely large thin-film membrane apertures. Recognizing this, the NASA Space transporta... |
Aug 16, 2004
Wester, Gene W.; Carr, Greg; Deligiannis, Frank; Jones, Loren; Lam, Barbara; Sauers, Jim; Haskell, Russ; Mulvey, Jim, 2004, "Power actuation and switching module development", https://hdl.handle.net/2014/39991, 2nd International Energy Conversion Engineering Conference, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
The Deep Space Avionics (DSA) Project is developing a Power Actuation and Switching Module (PASM). This component enables a modular and scalable design approach for power switching applications, which can result in a wide variety of power switching architectures using this simple... |
Aug 16, 2004
Johnson, Wyatt R.; Lyons, Dan T., 2004, "Titan ballute aerocapture using a perturbed TitanGRAM model", https://hdl.handle.net/2014/39990, AIAA/AAS Astrodynamics Specialst Conference and Exhibit, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
Aerocapture using a towed, inflatable ballute system has been shown to provide significant performance advantages compared to traditional technologies, including lower heating rates and accommodation of larger navigational uncertainties. This paper extends previous results by des... |
Aug 16, 2004
Esposito, Pasquale B.; Bhat, R.; Demcak, S.; Ardakab, S.; Breeden, J.; Helfrich, C.; Jefferson, D.; Stauch, J., 2004, "MGS and Odyssey - relay satellites for the MER mission", https://hdl.handle.net/2014/39987, AIAA/AAS Astrodynamics Specialst Conference and Exhibit, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
This paper will present the navigation plan, trajectory propagation accuracy and maneuver execution for the successful MGS and Odyssey over-flights of both the MER rovers. |
Aug 16, 2004
Ratnakumar, B. V.; Smart, M. C.; Ewell, R. C.; Whitcananck, L. D.; Kindler, A.; Narayanan, S. R.; Surampudi, S., 2004, "Lithium-sulfur dioxide batteriess on Mars Rovers", https://hdl.handle.net/2014/40004, 2nd International Energy Conversion Engineering Conference, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
Lithium-sulfur dioxide batteries exhibit voltage delay, which tends to increase at low discharge temperatures, especially after extended storage at warm temperatures. In the absence of a depassivation circuit, as provided on earlier missions, e.g., Galileo, we were required to de... |
Aug 16, 2004
Lisano, Michael E., 2004, "A practical six-degree of freedom solar sail dynamics model for optimizing solar sail trajectories with torque constraints", https://hdl.handle.net/2014/38820, AIAA Guidance, Navigation and Control Conference, Providence, Rhode Island, August 16, 2004., JPL Open Repository
Controlled flight of a solar sail-propelled spacecraft (“sailcraft”) is a six-degree-of-freedom dynamics problem. Current state-of-the-art tools that simulate and optimize the trajectories flown by sailcraft do not treat the full kinetic (i.e. force and torque-constrained) motion... |
Aug 16, 2004
McElrath, Tim; Watkins, Michael L.; Portock, Brian; Graat, Eric; Baird, Darren; Wawrzyniak, Geoffrey; Guinn, Joseph; Antreasian, Peter; Attiyah, Amy; Baalke, Ronald; Taber, William, 2004, "Mars Exploration Rovers orbit determination filter strategy.", https://hdl.handle.net/2014/39054, AIAA/AAS Astrodynamics Specialist Conference, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
The successful delivery of the Mars Exploration Rover (MER) landers to well with in the boundaries of their surface target areas in January of 2004 was the culmination of years of orbit determination analysis. The process began with a careful consideration of the filter parameter... |
Aug 16, 2004
Haeberle, Dennis W.; Spencer, David B.; Ely, Todd A., 2004, "Interplanetary navigation using a continental baseline large antenna arrays", https://hdl.handle.net/2014/38830, AIAA/AAS Astrodynamics Specialist Conference, Providence, Rhode Island, August 16-19, 2004., JPL Open Repository
Navigation is a key component of interplanetary missions and must continue to be precise with the changing landscape of antenna design. Improvements for the Deep Space Network (DSN) may include the use of antenna arrays to simulate the power of a larger single antenna at much low... |
