Results 81 to 90 of about 162,805 (182)
Neustrelitz Total Electron Content Model for Galileo Performance: A Position Domain Analysis. [PDF]
Sensors (Basel), 2023 Gioia C, Angrisano A, Gaglione S.
europepmc +1 more source
Manned Mars mission solar physics: Solar energetic particle prediction and warning [PDF]
There are specific risks to the crew of the manned Mars mission from energetic particles generated by solar activity. Therefore, mission planning must provide for solar monitoring and solar activity forecasts.
Suess, S. T.
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System using leo satellites for centimeter-level navigation [PDF]
, 2002 Disclosed herein is a system for rapidly resolving position with centimeter-level accuracy for a mobile or stationary receiver [4]. This is achieved by estimating a set of parameters that are related to the integer cycle ambiguities which arise in ...
Cohen, Clark E. +3 more
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Precise time and time interval (PTTI), an overview [PDF]
Present applications of precise time and frequency (T/F) technology can be grouped as follows: (1) Communications systems which require T/F for time division multiplexing and for using spread spectrum techniques. (2) Navigation systems which need T/F for
Winkler, G. M. R.
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Transit satellite system timing capabilities [PDF]
, 1978 Current time transfer capabilities of the Transit Satellite System are reviewed. Potential improvements in the changes in equipment and operational procedures using operational satellites are ...
Finsod, T. D.
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Application of global positioning system to determination of tectonic plate movements and crustal deformations [PDF]
It is shown that pseudo-range measurements to four GPS satellites based on correlation of the pseudo random code transmissions from the satellites can be used to determine the relative position of ground stations which are separated by several hundred ...
Anderle, R. J.
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Characterization of the Ability of Low-Cost GNSS Receiver to Detect Spoofing Using Clock Bias. [PDF]
Sensors (Basel), 2023 Truong V +3 more
europepmc +1 more source
VEGA Pathfinder navigation for Giotto Halley encounter [PDF]
Results of the VEGA Pathfinder concept which was used to successfully target the European Space Agnecy's Giotto spacecraft to a 600 km encounter with the comet Halley are presented.
Ellis, J., Mcelrath, T. P.
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Submicrosecond time transfer between the United States, United Kingdom, and Australia via satellite [PDF]
During 1972 time transfer experiments were run between the U.S. Naval Observatory and the Royal Greenwich Observatory and, in 1973, between the U.S. Naval Observatory and the Division of National Mapping in Canberra, Australia.
Easton, R. L., Morgan, P., Smith, H. M.
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