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1 to 10 of 2,016 Results
Solar system science with Pueo-Nui
Dec 22, 2003
Dumas, C., 2003, "Solar system science with Pueo-Nui", https://hdl.handle.net/2014/7256, ['Pueo-Nui Workshop', 'Grenoble, France'], JPL Open Repository
No abstract provided
X-ray emission from the pre–planetary Nebula Henize 3-1475
Dec 20, 2003
Sahai, Raghvendra; Kastner, Joel H.; Frank, Adam; Morris, Mark; Blackman, Eric G., 2003, "X-ray emission from the pre–planetary Nebula Henize 3-1475", https://hdl.handle.net/2014/40954, The Astrophysical Journal Letters, 599:L87–L90, 2003 December 20, JPL Open Repository
We report the first detection of X-ray emission in a pre–planetary nebula, He 3-1475. Pre–planetary nebulae are rare objects in the short transition stage between the asymptotic giant branch (AGB) and planetary nebula evolutionary phases, and He 3-1475, characterized by a remarka...
Self-organizing control for space-based sparse antennas
Dec 17, 2003
Hadaegh, Fred Y.; Jamnejad, Vaharaz; Scharf, Daniel P.; Ploen, Scott R., 2003, "Self-organizing control for space-based sparse antennas", https://hdl.handle.net/2014/38797, Intech 2003, Chiang Mai, Thailand, December 17, 2003, JPL Open Repository
An integrated control and electromagnetic/antenna formulation is presented for evaluating the performance of a distributed antenna system as a function of formation geometry. A distributed and self-organizing control law for the control law for the control of multiple antennas in...
Sythnetic LISA: simulating time delay inteferometry in a model LISA
Dec 17, 2003
Armstrong, J. W.; Vallisneri, M., 2003, "Sythnetic LISA: simulating time delay inteferometry in a model LISA", https://hdl.handle.net/2014/37373, ['8th Annual Gravitational Wave Data Analysis Workshop', 'Milwaukee, Wisconsin, USA'], JPL Open Repository
No abstract provided
Tracking the moving photocenters of active galaxies: binary black holes, accretion disks, and relativistic jets
Dec 16, 2003
Wehrle, Ann E.; Jones, Dayton; Unwin, Stephen; Meier, Davis; Piner, B. Glenn, 2003, "Tracking the moving photocenters of active galaxies: binary black holes, accretion disks, and relativistic jets", https://hdl.handle.net/2014/37414, UNKNOWN, JPL Open Repository
No abstract provided
A study of near to far fields of JPL Deep Space Network (DSN) antennas for RFI analysis
Dec 15, 2003
Jamnejad, Vahraz, 2003, "A study of near to far fields of JPL Deep Space Network (DSN) antennas for RFI analysis", https://hdl.handle.net/2014/41560, Aerospace Conference, 2004. Proceedings. 2004 IEEE, pg 975-986 Vol. 2, DOI:10.1109/AERO.2004.1367698, JPL Open Repository
This paper addresses the issue of calculating the gain and power distribution of DSN antennas in the Fresnel (middle zone) and Fraunhofer (far zone) as a function of the distance from the DSN antenna and the off-boresight angle. Calculating the near and mid fields of DSN antennas...
A conceptual framework for personalizing knowledge delivery services
Dec 13, 2003
Cooper, L. P.; Chellappa, R. K.; Majchrzak, A., 2003, "A conceptual framework for personalizing knowledge delivery services", https://hdl.handle.net/2014/7928, ['Society for Information Managment Academic Workshop', 'Seattle, WA, USA'], JPL Open Repository
No abstract provided
Daytime adaptive optics for deep space optical communications
Dec 12, 2003
Wilson, Keith; Troy, M.; Srinivasan, M.; Platt, B.; Vilnrotter, V.; Wright, M.; Garkanian, V.; Hemmati, H., 2003, "Daytime adaptive optics for deep space optical communications", https://hdl.handle.net/2014/39106, 10th International Space Conference of Pacific-basin Societies, Tokyo, Japan, December 10, 2003., JPL Open Repository
The deep space optical communications subsystem offers a higher bandwidth communications link in smaller size, lower mass, and lower power consumption subsystem than does RF. To demonstrate the benefit of this technology to deep space communications NASA plans to launch an optica...
CMB polarimetry with bolometers
Dec 11, 2003
Bock, J. J., 2003, "CMB polarimetry with bolometers", https://hdl.handle.net/2014/8033, ["SpacePatt '03", 'Washington D.C., USA'], JPL Open Repository
No abstract provided
A novel two-step laser ranging technique for a precision test of the theory of gravity
Dec 10, 2003
Penanen, Konstantin; Chui, Talso, 2003, "A novel two-step laser ranging technique for a precision test of the theory of gravity", https://hdl.handle.net/2014/38272, Second International Conference on Particle and Fundamental Physics in Space, Washington DC, December, 10, 2003, JPL Open Repository
All powered spacecraft experience residual systematic acceleration due to anisotropy of the thermal radiation pressure and fuel leakage. The residual acceleration limits the accuracy of any test of gravity that relies on the precise determination of the spacecraft trajectory. We...
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