41,881 to 41,890 of 42,321 Results
Feb 24, 1993
Bellan, Josette, 1993, "The Jet Propulsion Laboratory Space Exploration Past, Present and Future", https://hdl.handle.net/2014/35389, Israel, JPL Open Repository
The most scientific results from space exploration carried out by the Jet Propulsion Laboratory (JPL) are discussed. To understand these results, a brief background of JPL's history is presented. The results from the missions of Voyager 1 and Voyager 2 are described. A brief disc... |
Feb 23, 1993
Dickinson, Richard M., 1993, "Challenges of International Programs in Commercial Wireless Power Trasmission", https://hdl.handle.net/2014/35379, San Antonio, Texas, USA, JPL Open Repository
The proposition is offered that only by forming international alliances will econmically viable commercial wireless poer transmission (WPT) result. Radio emissions from commercial WPT will likely extend beyond the borders of a single nation. |
Feb 23, 1993
Douglas S. Abraham; Anspaugh, Bruce E.; Nesmith, Bill J.; Penzo, Paul A.; Smith, Jeffery H., 1993, "A Demonstration Plan For Laser-Beamed Power", https://hdl.handle.net/2014/34883, San Antonio, Texas, USA, JPL Open Repository
In a constrained budgetary era under pressure to develop faster, better, and less expensive space projects, efforts to develop laser-beamed power for lunar and propulsion applications must first focus on defining near-term, commercially attractive deliverables that will demonstra... |
Feb 22, 1993
Bassiri, S.; Hajj, G., 1993, "Higher-Order Ionospheric Effects on the GPS Observables and Means of Modeling Them", https://hdl.handle.net/2014/34918, Pasadena, California, USA, JPL Open Repository
Based on realistic modeling of the electron density of the ionosphere and using a dipole moment approximation for the earth magnetic field, we are able to estimate the effect of the ionosphere on the GPS signal for a ground user. Our study implies reduction of the second-order io... |
Feb 22, 1993
Nandi, S.; Border, J.; Folkner, W., 1993, "Demonstration of Use of a Real Time Tone Tracker to Obtain Same Beam Interferometry Data", https://hdl.handle.net/2014/34930, ['1993 AAS/AIAA Spaceflight Mechanics Meeting', 'Pasadena, California, USA'], JPL Open Repository
The radio metric tracking technique known as Same-Beam Interferometry has been shown to improve orbit determination accuracy for the Magellan and Pioneer 12 Orbiter. |
Feb 22, 1993
Williams, B.G.; Christensen, E.J.; Yuan, D.N.; McColl, K.C.; Sunseri, R.F., 1993, "Short Arc Orbit Determination for Altimeter Calibration and Validation on TOPEX/Poseidon", https://hdl.handle.net/2014/34947, Pasadena, CA, JPL Open Repository
TOPEX/Poseidon (T/P) is a joint mission of US NASA and French CNES design launched August 10, 1992. It carries two radar altimeters which alternately share a common antenna. There are two project designated verification sites, a NASA site off the coast at Pt. Conception, CA, and... |
Feb 22, 1993
Ohsaka, K.; Trinh, E., 1993, "Development of a Versatile Electromagnetic Levitator", https://hdl.handle.net/2014/34978, ['Symposium Proceeding - Containerless Processing', 'Denver, Colorado, USA'], JPL Open Repository
A versatile electromagnetic levitator for ground-based experiments is under development at the Jet Propulsion Laboratory. |
Feb 22, 1993
Christensen, E. J.; Williams, B. G.; Yuan, D. N.; McColl, K. C., 1993, "Modeling Non-Gravitational Forces Acting on Topex/Poseidon: The Early Days", https://hdl.handle.net/2014/34948, Pasadena, California, USA, JPL Open Repository
Topex/Poseidon is a satellite mission that will use altimetry to make precise measurements of sea-level with unprecedented acuracy such that small-amplitude, basin wide sea-level with unprecedented accuracy such that small-amplitude, basin wide sea-level changes caused by large-s... |
Feb 22, 1993
Kroger, P.; Folkner, W.; Lijima, B.; Hildebrand, C., 1993, "Very-Long-Baseline-Interferometry Measurements of Planetary Orbiters at Mars and Venus", https://hdl.handle.net/2014/34928, ['AIAA, Spacefligth Mechanics', 'Pasadena, California, USA'], JPL Open Repository
Very-long-baseline interferometric measurements of the positions of planetary orbiters/landers relative to nearby extra galactic radio sources provide information on the positions of the planets in the inertial reference frame described by the measured positions of the radio sour... |
Feb 22, 1993
Thurman, S.; Estefan, J., 1993, "Radio Doppler Navigation of Interplanetary Spacecraft Using Different Data Processing Modes", https://hdl.handle.net/2014/36690, Pasadena, California, USA, JPL Open Repository
Doppler shift measurements derived from closed-loop radio tracking of distant spacecraft by ground stations of the Deep Space Network (DSN) are one of the principal means used for interplanetary navigation. |