5,791 to 5,800 of 6,770 Results
Oct 4, 2004
Freeland, R. E.; Helms, Richard G.; Mikulas, M. M.; Stuckey, Wayne; Steckel, Gary; Watson, Judith; Willis, Paul, 2004, "Inflatable space structures technology development for large radar antennas.", https://hdl.handle.net/2014/40013, 24th International Symposium on Space Technology and Science, Vancouver, Canada, October 4-8, 2004., JPL Open Repository
There has been recent interest in inflatable space-structures technology for possible applications on US. Department of Defense (DOD) missions because of the technology's potential for high mechanical-packaging efficiency, variable stowed geometry, and deployment reliability. In... |
Oct 4, 2004
D’Amario, Louis A.; Watkins, Michael M., 2004, "Mars Exploration Rover - a new standard for interplanetary navigation", https://hdl.handle.net/2014/39466, 55th International Astronautical Congress, Vancouver, British Colombia, Canada, October 4-8, 2004., JPL Open Repository
The twin Mars Exploration Rovers, Spirit and Opportunity, arrived at Mars for landings respectively at Gusev Crater (on January 4, 2004) and Meridiani Planum (on January 25, 2004). During the development of the mission, the capability of the navigation system to deliver the lande... |
Oct 4, 2004
Edwards, Charles D., Jr.; Barbieri, A.; Brower, E.; Estabrook, P.; Gibbs, R.; Horttor, R.; Ludwinski, J.; Mase, R.; McCarthy, C.; Schmidt, R.; Theisinger, P.; Thorpe, T.; Waggoner, B., 2004, "A Martian telecommunications network : UHF relay support of the Mars Exploration Rovers by the Mars Global Surveyor, Mars Odyssey, and Mars Express Orbiters.", https://hdl.handle.net/2014/40031, 55th International Astonautical Congress, Vancouver, Bristish Columbia, Canada, October 4-8, 2004., JPL Open Repository
NASA and ESA have established an international network of Mars orbiters, outfitted with relay communications payloads, to support robotic exploration of the red planet. Starting in January, 2004, this network has provided the Mars Exploration Rovers with telecommunications relay... |
Oct 4, 2004
Mitcheltree, Robert A.; Lee, Wayne; Steltzner, Adam; SanMartin, Alejanhdro, 2004, "Mars Exploration Rover Mission : entry, descent, and landing system validation", https://hdl.handle.net/2014/41030, 55th International Astronautical Congress, Vancouver, British Columbia, Canada, October 4-8, 2004., JPL Open Repository
System validation for a Mars entry, descent, and landing system is not simply a demonstration that the electrical system functions in the associated environments. The function of this system is its interaction with the atmospheric and surface environment. Thus, in addition to tra... |
Oct 4, 2004
Fernández, Michela Muñoz; Vilnrotter, Victor A., 2004, "Adaptive combining of coherently detected PPM signals in the presence of atmospheric turbulence", https://hdl.handle.net/2014/41060, International Astronautical Congress, Vancouver, British Columbia, Canada, October 4-8. 2004., JPL Open Repository
Adaptive combining of experimentally obtained heterodyned pulse position modulated (PPM) signals with pulse-to-pulse coherence, in the presence of simulated spatial distortions resembling atmospheric turbulence, is demonstrated. The adaptively combined PPM signals are phased up v... |
Oct 4, 2004
Rayman, Marc D.; Fraschetti, Thomas C.; Russell, Christopher T.; Raymond, Carol A., 2004, "Dawn : a mission in developement for exploration of main belt asteroids Vesta and Ceres", https://hdl.handle.net/2014/38853, 55th International Astronautical Congress, Vancouver, Canada, October 4-8, 2004., JPL Open Repository
Dawn is in development for a 2006 launch on a mission to explore main belt asteroids in order to yield insights into important questions about the formation and evolution of the solar system. Its objective is to acquire detailed data from orbit around two complementary bodies, Ve... |
Oct 4, 2004
Balint, Tibor S., 2004, "Small power system trade options for advanced Mars mission studies", https://hdl.handle.net/2014/39103, International Astronautical Congress, Vancouver, Canada, October 4-8, 2004., JPL Open Repository
In this study, mission trades, scaling relationships and point designs are used to evaluate both power systems for proposed next decade landed missions. |
Oct 4, 2004
Savchenkov, Anatoliy A.; Matsko, Andrey B.; Strekalov, Dmitry; Mohageg, Makan; Iltchenko, Vladimir S.; Maleki, Lute, 2004, "All-optical photonic oscillator with high-Q whispering gallery mode resonators", https://hdl.handle.net/2014/40742, International Topical Meeting on Microwave Photonics, Ogunquit, Maine, October 4-6, 2004., JPL Open Repository
We demonstrated low threshold optical photonic hyper-parametric oscillator in a high-Q (10¹º) CaF2 whispering gallery mode resonator which generates stable 8.5 GHz signal. The oscillations result from the resonantly enhanced four wave mixing occurring due to Kerr nonlinearity of... |
Oct 4, 2004
Erickson, James K.; Manning, Robert M.; Adler, M., 2004, "Mars Exploration Rover: launch, cruise, entry, descent, and landing", https://hdl.handle.net/2014/40606, 55th International Astronautical Congress, Vancouver, Canada, October 4, 2004., JPL Open Repository
The Mars Exploration Rover Project was an ambitious effort to land two highly capable rovers on Mars and concurrently explore the Martian surface for three months each. Launched in June and July of 2003, cruise operations were conducted through January 4,2004 with the first landi... |
Oct 3, 2004
Karasik, Boris S.; Sergeev, Andrei V., 2004, "THz hot-electron photon counter", https://hdl.handle.net/2014/40549, IEEE Transactions on Applied Superconductivity Applied Superconductivity Conference, Jacksonville, Florida, October 3-8, 2004., JPL Open Repository
We present a concept for the hot-electron transition-edge sensor capable of counting THz photons. The main need for such a sensor is a spectroscopy on future space telescopes where a background limited NEP ~ 10ˉ²° W/H¹´² is expected at around 1 THz. Under these conditions, the ra... |
