NASA Scientific and Technical Aerospace Reports - The University ...

20100017042 Air Force Inst. of Tech., Wright-Patterson AFB, OH USA
Aiding GPS With Additional Satellite Navigation Services
Mutlu, Yasin A; Mar 2010; 98 pp.; In English; Original contains color illustrations
Report No.(s): AD-A517266; AFIT/GSS/ENG/10-01; No Copyright; Avail.: Defense Technical Information Center (DTIC)
In modern warfare navigation services are very important. GPS is currently providing service for accurate navigation,
except in some areas, especially urban areas, where GPS signals cannot always be tracked by users. In these cases some
additional navigation support could be provided by other global navigation satellite systems. If GPS is combined with other
navigation systems than the navigation gap will be minor. In this thesis, the effect of combining GPS with other satellite
navigation systems, specifically GLONASS, Galileo and Compass, is evaluated in terms of availability and position dilution
of precision (PDOP) values. First, satellite constellations are simulated in Satellite Tool Kit (STK) to generate ephemeris data.
A street scenario is then established for simulating different elevation mask angles to represent urban and mountainous areas.
The performance of the combined system is also evaluated as a function of the uncertainty in the time offset between systems.
DTIC
Global Positioning System; Navigation; Navigation Satellites
20100017196 NASA, Washington, DC, USA
Abstracts of the Annual Meeting of Planetary Geologic Mappers, San Antonio, TX, 2009
Bleamaster, Leslie F., III, Editor; Tanaka, Kenneth L.; Kelley, Michael S.; June 2009; 78 pp.; In English; Annual Meeting of
Planetary Geologic Mappers, 24-26 Jun. 2009, San Antonio, TX, USA; See also 20100017197 - 20100017221; Original
contains color illustrations
Report No.(s): NASA/CP-2010-216680; Copyright; Avail.: CASI: A05, Hardcopy
ONLINE: http://hdl.handle.net/2060/20100017196
Topics covered include: Geologic Mapping of the Beta-Atla-Themis (BAT) Region of Venus: A Progress Report; Geologic
Map of the Snegurochka Planitia Quadrangle (V-1): Implications for Tectonic and Volcanic History of the North Polar Region
of Venus; Preliminary Geological Map of the Fortuna Tessera (V-2) Quadrangle, Venus; Geological Map of the Fredegonde
(V-57) Quadrangle, Venus; Geological Mapping of the Lada Terra (V-56) Quadrangle, Venus; Geologic Mapping of V-19;
Lunar Geologic Mapping: A Preliminary Map of a Portion of the LQ-10 (‘Marius’) Quadrangle; Geologic Mapping of the
Lunar South Pole, Quadrangle LQ-30: Volcanic History and Stratigraphy of Schr dinger Basin; Geologic Mapping along the
Arabia Terra Dichotomy Boundary: Mawrth Vallis and Nili Fossae, Mars; Geologic Mapping Investigations of the Northwest
Rim of Hellas Basin, Mars; Geologic Mapping of the Meridiani Region of Mars; Geology of a Portion of the Martian
Highlands: MTMs -20002, -20007, -25002 and -25007; Geologic Mapping of Holden Crater and the Uzboi-Ladon-Morava
Outflow System; Mapping Tyrrhena Patera and Hesperia Planum, Mars; Geologic Mapping of Athabaca Valles; Geologic
Mapping of MTM -30247, -35247 and -40247 Quadrangles, Reull Vallis Region, Mars Topography of the Martian Impact
Crater Tooting; Mars Structural and Stratigraphic Mapping along the Coprates Rise; Geology of Libya Montes and the
Interbasin Plains of Northern Tyrrhena Terra, Mars: Project Introduction and First Year Work Plan; Geology of the Southern
Utopia Planitia Highland-Lowland Boundary Plain: Second Year Results and Third Year Plan; Mars Global Geologic
Mapping: About Half Way Done; New Geologic Map of the Scandia Region of Mars; Geologic Mapping of the Medusae
Fossae Formation on Mars and the Northern Lowland Plains of Venus; Volcanism on Io: Insights from Global Geologic
Mapping; and Planetary Geologic Mapping Handbook - 2009.
Author
Abstracts; Geological Surveys; Lunar Maps; Mars Craters; Planetary Geology; Planetary Mapping; Radioactive Isotopes;
Structural Basins; Stratigraphy; Tectonics; Volcanoes
20100017197 NASA, Washington, DC, USA
Lunar Geologic Mapping: A Preliminary Map of a Portion of the LQ-10 (‘Marius’) Quadrangle
Gregg, T. K. P.; Yingst, R. A.; Abstracts of the Annual Meeting of Planetary Geologic Mappers, San Antonio, TX, 2009; June
2009, pp. 13-14; In English; See also 20100017196; Original contains color illustrations; Copyright; Avail.: CASI: A01,
Hardcopy
ONLINE: http://hdl.handle.net/2060/20100017197
Since the first lunar mapping program ended in the 1970s, new topographical, multispectral, elemental and albedo
imaging datasets have become available (e.g., Clementine, Lunar Prospector, Galileo). Lunar science has also advanced within
the intervening time period. A new systematic lunar geologic mapping effort endeavors to build on the success of earlier
mapping programs by fully integrating the many disparate datasets using GIS software and bringing to bear the most current
understanding of lunar geologic history. As part of this program, we report on a 1:2,500,000-scale preliminary map of a subset
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