2,861 to 2,870 of 2,910 Results
Sep 1, 2004
Stapelfeldt, K. R.; Holmes, E. K.; Chen, C.; Rieke, G. H.; Su, K. Y. L.; Hines, D. C.; Werner, M. W.; Beichman, C. A.; Jura, M.; Padgett, D. L.; Stansberry, J. A.; Bendo, G.; Cadien, J.; Marengo, M.; Thomspson, T.; Velusamy, T.; Backus, C.; Blaylock, M.; Egami, E.; Engelbracht, C. W.; Frayer, D. T.; Gordon, K. D.; Keene, J.; Latter, W. B.; Megeath, T.; Misselt, K.; Morrison, J. E.; Muzerolle, J.; Noriega-Crespo, A.; Van Cleve, J.; Young, E. T., 2004, "First look at the Fomalhaut debris disk with the Spitzer Space Telescope", https://hdl.handle.net/2014/25502, Astrophysical journal supplement series, Vol. 154, pp.458-462, JPL Open Repository
We present Spitzer Space Telescope early release observations of Fomalhaut, a nearby A-type star with dusty circumstellar debris. The disk is spatially resolved at 24, 70, and 160 mu m using the Multiband Imaging Photometer for Spitzer (MIPS). While the disk orientation and outer... |
Sep 1, 2004
Noriega-Crespo, Alberto; Morris, Patrick; Marleau, Francine R.; Carey, Sean; Boogert, Adwin; van Dishoeck, Ewine; Evans, Neal J. II.; Keene, Jocelyn; Muzerolle, James; Stapelfeldt, Karl; Pontoppidan, Klaus; Lowrance, Patrick; Allen, Lori; Bourke, Tyler L., 2004, "A new look at stellar outflows : Spitzer Observations of the HH 46/47 system", https://hdl.handle.net/2014/40820, The Astrophysical Journal Supplement Series, 154:352–358, 2004 September, doi.org/10.1086/422819, JPL Open Repository
We present the Early Release Observations of the HH 46/47 system and HH 46 IRS 1 source, taken with the three instruments aboard the Spitzer Space Telescope. The optically invisible southwest lobe, driven by the HH 47C bow shock, is revealed in full detail by the Infrared Array C... |
Aug 18, 2004
Kwok, Ron; Zwally, H. Jay; Yi, Donghui, 2004, "ICESat observationsof Arctic sea ice : a first look", https://hdl.handle.net/2014/40045, Geophysical Research Letter, Vol. 31. L16401, doi:10.1029/2004GL020309, 2004, JPL Open Repository
Analysis of near-coincident ICESat and RADARSAT imagery shows that the retrieved elevations from the laser altimeter are sensitive to new openings (containing thin ice or open water) in the sea ice cover as well as to surface relief of old and first-year ice. The precision of the... |
Aug 12, 2004
Wang, Ou; Fukumori, Ichiro; Lee, Tong; Cheng, Benny, 2004, "On the cause of eastern equatorial Pacific Ocean T-S variations associated with El Nino", https://hdl.handle.net/2014/40879, Geophysical Research Letters, Vol. 31, L15309, doi:10.1029/2004GL020188, 2004, JPL Open Repository
The nature of observed variations in temperature-salinity (T-S) relationship between El Nino and non-El Nino years in the pycnocline of the eastern equatorial Pacific Ocean (NINO3 region, 5°S–5°N, 150°W–90°W) is investigated using an ocean general circulation model. The origin of... |
Aug 10, 2004
Shi, Fang; Chanan, Gary; Ohara, Catherine; Troy, Mitchell; Redding, David C., 2004, "Experimental verification of dispersed fringe sensing as a segment phasing technique using the Keck Telescope", https://hdl.handle.net/2014/40832, Applied Optics, Vol. 43, Issue 23, pp. 4474-4481, doi.org/10.1364/AO.43.004474, JPL Open Repository
Dispersed fringe sensing (DFS) is an efficient and robust method for coarse phasing of segmented primary mirrors (from one quarter of a wavelength to as much as the depth of focus of a single segment, typically several tens of microns). Unlike phasing techniques currently used fo... |
Aug 8, 2004
Tang, Wenqing; Liu, W. Timothy; Stiles, Bryan W., 2004, "Evaluation of high-resolution ocean surface vector winds measured by QuikSCAT scatterometer in coastal regions", https://hdl.handle.net/2014/40909, IEEE Transactions On Geoscience And Remote Sensing, Vol. 42, No. 8, AUGUST 2004, dio:10.1109/TGRS.2004.831685, JPL Open Repository
The SeaWinds scatterometer onboard QuikSCAT covers approximately 90% of the global ocean under clear and cloudy condition in 24 h, and the standard data product has 25-km spatial resolution. Such spatial resolution is not sufficient to resolve small-scale processes, especially in... |
Aug 7, 2004
Tsurutani, Bruce; Mannucci, Anthony; Iijima, Byron; Abdu, Mangalathayil Ali; Sobral, Jose Humberto A.; Gonzalez, Walter; Guarnieri, Fernando; Tsuda, Toshitaka; Saito, Akinori; Yumoto, Kiyohumi; Fejer, Bela; Fuller-Rowell, Timothy J.; Kozyra, Janet; Foster, John C.; Coster, Anthea; Vasyliunas, Vytenis M., 2004, "Global dayside ionospheric uplift and enhancement associated with interplanetary electric fields", https://hdl.handle.net/2014/40828, Journal Of Geophysical Research, Vol. 109, A08302, doi:10.1029/2003JA010342, 2004, JPL Open Repository
The interplanetary shock/electric field event of 5–6 November 2001 is analyzed using ACE interplanetary data. The consequential ionospheric effects are studied using GPS receiver data from the CHAMP and SAC-C satellites and altimeter data from the TOPEX/ Poseidon satellite. Data... |
Aug 2, 2004
Lowman, Andrew; Stauder, John L., 2004, "Stray light lessons learned from the Mars Reconnaissance Orbiter's optical navigation camera", https://hdl.handle.net/2014/41820, Proc. SPIE 5526, 240 (2004); doi:10.1117/12.566080, JPL Open Repository
The Optical Navigation Camera (ONC) is a technical demonstration slated to fly on NASA"s Mars Reconnaissance Orbiter in 2005. Conventional navigation methods have reduced accuracy in the days immediately preceding Mars orbit insertion. The resulting uncertainty in spacecraft loca... |
Aug 2, 2004
Milman, Mark H.; Korechoff, R. E., 2004, "Error modeling of multibaseline optical truss: part 1: modeling of system level preformance", https://hdl.handle.net/2014/41824, Proc. SPIE 5528, 118 (2004); doi:10.1117/12.557202, JPL Open Repository
Global astrometry is the measurement of stellar positions and motions. These are typically characterized by five parameters, including two position parameters, two proper motion parameters, and parallax. The Space Interferometry Mission (SIM) will derive these parameters for a gr... |
Aug 1, 2004
Ramírez, Solange V.; Rebull, Luisa; Stauffer, John; Strom, Stephen; Hillenbrand, Lynne; Hearty, Thomas; Kopan, Eugene L.; Pravdo, Steven; Makidon, Russell; Jones, Burton, 2004, "Chandra X-ray observations of young clusters : II. Orion Flanking Fields Data", https://hdl.handle.net/2014/40848, The Astronomical Journal 128, 787-804, August 2004, doi: 10.1086/422349, JPL Open Repository
We present results of Chandra observations of two flanking fields (FFs) in Orion, outside the Orion Nebula Cluster (ONC). The observations were taken with the ACIS-I camera with an exposure time of about 48 ks each field. We present a catalog of 417 sources, which includes X-ray... |
