2,871 to 2,880 of 2,884 Results
Jun 23, 2003
Hadaegh, Fred Y.; Scharf, Daniel P.; Ploen, Scott R., 2003, "Initialization of distributed spacecraft for precision formation flying", https://hdl.handle.net/2014/40935, Control Applications, 2003. CCA 2003. Proceedings of 2003 IEEE Conference on Volume 2, Page(s):1463 - 1468 vol.2, JPL Open Repository
In this paper’we present a solution to the formation initialization (FI) problem for N distributed spacecraft located in deep space. Our solution to the FI problem is based on a three-stage sky search procedure that reduces the FI problem for N spacecraft to the simpler problem o... |
Jun 1, 2003
Stern, Daniel; Holden, Brad; Stanford, S. A.; Spinard, Hyron, 2003, "Confirmation of a radio-selected galaxy overdensity at z=1.11", https://hdl.handle.net/2014/40834, The Astronomical Journal 125, 2759-2768 doi: 10.1086/374229, JPL Open Repository
We report the discovery of a galaxy overdensity at z = 1.11 associated with the z = 1.110 high-redshift radio galaxy MG1 J04426+0202 (hereafter MG 0442+0202). The group, Cl 0442+0202, was found in a near-infrared survey of z > 1 radio galaxies undertaken to identify spatially coi... |
Jun 1, 2003
Stern, Daniel; Holden, Brad; Stanford, S. A.; Spinard, Hyron, 2003, "Confirmation of a radio-selected galaxy overdensity at z = 1.11¹", https://hdl.handle.net/2014/40860, The Astronomical Journal, 125:2759–2768, 2003 June, doi.org/10.1086/374229, JPL Open Repository
We report the discovery of a galaxy overdensity at z = 1.11 associated with the z = 1.110 high-redshift radio galaxy MG1 J04426+0202 (hereafterMG0442+0202). The group, Cl 0442+0202, was found in a near-infrared survey of z > 1 radio galaxies undertaken to identify spatially coinc... |
Mar 18, 2003
Clare, Loren P.; Jennings, Esther H.; Gao, Jay L., 2003, "Performance evaluation modeling of network sensors.", https://hdl.handle.net/2014/41543, 2003 IEEE Aerospace Conference Proceedings, Vol 3. Page(s): 3-1313 - 3-1322, JPL Open Repository
Substantial benefits are promised by operating many spatially separated sensors collectively. Such systems are envisioned to consist of sensor nodes that are connected by a communications network. A simulation tool is being developed to evaluate the performance of networked senso... |
Mar 3, 2003
Bar-Cohen, Yoseph; Bao, X.; Chang, Z.; Sherrit, S., 2003, "An ultrasonic sampler and sensor platform for in-situ astrobiological exploration", https://hdl.handle.net/2014/41159, Proceedings ofthe SPIE Smart Structures and Materials Symposium, San Diego, California, March 3-6, 2003, JPL Open Repository
The search for existing or past life in the Universe is one of the most important objectives of NASA's mission. In support of this objective, ultrasonic based mechanisms are currently being developed at JPL to allow probing and sampling rocks as well as perform as a sensor platfo... |
Jan 1, 2003
Anderson, R. C.; Castano, R.; DeCoste, D.; Mazzoni, D.; Dohm, J., 2003, "An automated approach for acquiring onboard rover science", https://hdl.handle.net/2014/37407, UNKNOWN, JPL Open Repository
Rover traverse distances are increasing at a faster rate than downlink capacity is increasing. As this trend continues, the quantity of data that can be returned to Earth per meter traversed is reduced. We have developed an onboard science analysis technology for increasing scien... |
Dec 27, 2002
Wu, Xiaoping; Argus, Donald F.; Heflin, Michael B.; Ivins, Erik R.; Webb, Frank H., 2002, "Site distribution and aliasing effects in the inversion for load coefficients and geocenter motion from GPS data", https://hdl.handle.net/2014/40838, Geophysical Research Letters, Vol. 29, No. 24, 2210, doi:10.1029/2002GL016324, 2002, JPL Open Repository
Precise GPS measurements of elastic relative site displacements due to surface mass loading offer important constraints on global surface mass transport. We investigate effects of site distribution and aliasing by higher-degree (n greater than or equal 2) loading terms on inversi... |
Dec 27, 2002
Wu, Xiaoping; Argus, Donald F.; Heflin, Michael B.; Ivins, Erik R.; Webb, Frank H., 2002, "Site distribution and aliasing effects in the inversion for load coefficients and geocenter motion from GPS data", https://hdl.handle.net/2014/40938, Geophysical Research Letters, Vol. 29, No. 24, 2210, doi:10.1029/2002GL016324, 2002, JPL Open Repository
Precise GPS measurements of elastic relative site displacements due to surface mass loading offer important constraints on global surface mass transport. We investigate effects of site distribution and aliasing by higher- degree (n ≥ 2) loading terms on inversion of GPS data for... |
Oct 1, 2001
Lo, Martin; Romans, Larry; Masdemont, Josep; Gomez, Gerard, 2001, "The TPF mission at L2", https://hdl.handle.net/2014/41659, 52 International Astrounautical Congress Meeting, Toulouse, France, October 1-5, 2001., JPL Open Repository
The Terrestrial Planet Finder (TPF) is one of the center pieces of NASA's Origins Program. The goal of TPF is to identify terrestrial planets around stars nearby the Sun. For this purpose, a space-based interferometer with a baseline of approximately 100 m is required. To achieve... |
Aug 29, 2001
Bruegge, C., 2001, "Ancillary Radiometric Product (APR) usage in the EOS/MISR Level 1B radiance product generation", https://hdl.handle.net/2014/13194, ['International Society for Optical Engineering', 'Pasadena, CA, USA'], JPL Open Repository
The radiometric response of the EOS-AM1 Multi-angle Imaging SpectroRadiometer (MISR) is to be measured throughout the six-year mission. This paper discusses the investigations and algorithm changes that have occurred in the production of the ARP since launch, and discusses change... |
