1 to 10 of 2,866 Results
May 1, 2000
Terebey, S.; Van Buren, D.; Matthews, K.; Padgett, D. L., 2000, "The spectrum of TMR-1C is consistent with a background star", https://hdl.handle.net/2014/40978, The Astronomical Journal, 119:2341-2348, 2000 May, JPL Open Repository
...This paper presents near-infrared grism spectroscopy to constrain the efective temperature of TMR-1C, obtained with the Near-Infrared Camera (NIRC) at Keck Observatory. To interpret the data, we construct a grid of extincted M dwarf spectra to compare with the low-resolution (... |
Dec 1, 2000
Garrett, Henry B.; Hoffman, Alan R., 2000, "Comparison of spacecraft charging environments at the Earth, Jupiter, and Saturn", https://hdl.handle.net/2014/40977, IEEE Transactions on Plasma Science, Vol. 28, No. 6, December 2000, p. 2048-2057, JPL Open Repository
Studies of the Earth with the ATS-5, ATS-6, and SCATHA spacecraft led to the development of several simple tools for predicting the potentials to be expected on a spacecraft in the space environment. These tools have been used to estimate the expected levels of worst case chargin... |
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... |
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... |
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... |
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... |
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... |
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... |
