41,811 to 41,820 of 42,221 Results
Feb 1, 1993
Jamnejad, V.; Cwik, T.; Resch, G., 1993, "Cost and Reliability Study for a Large Array of Small Reflector Antennas for JPL/NASA Deep Space Network (DSN)", https://hdl.handle.net/2014/34761, ['IEEE Aerospace Applications Conference', 'Steamboat, Colorado'], JPL Open Repository
A study is performed to estimate the cost of an array of small aperture reflector antennas to be used instead or in conjunction with the current large reflector antennas of the JPL/NASA Deep Space Network (DSN), for servicing present and future NASA missions which involve smaller... |
Feb 1, 1993
O'Neil, W., 1993, "Galileo: Challenges Enroute to Jupiter", https://hdl.handle.net/2014/34825, ['American Astronautical Society - Guidance and Control', 'Keystone, Colorado, USA'], JPL Open Repository
The Galileo spacecraft is now on its three-year direct Earth-to-Jupiter transfer trajectory. |
Feb 1, 1993
Kahn, R. D.; Thurman, S. W.; Edwards, C. D., 1993, "In-Situ Radio-Metric Tracking to Support Navigation for Interplanetary Missions with Multiple Spacecraft", https://hdl.handle.net/2014/34931, Pasadena, California, USA, JPL Open Repository
Doppler and ranging measurements between spacecraft can be obtained only when the ratio of the total received signal power to noise power density at the receiving spacecraft is sufficiently large that reliable signal detection can be achieved within a reasonable time period. |
Feb 1, 1993
Shapiro, B.; Bhat, R.; Frauenholz, R., 1993, "Using Anomalous Along-Track Forces for Topex/Poseidon Ground Track Control", https://hdl.handle.net/2014/36056, Cocoa Beach, Florida, USA, JPL Open Repository
The TOPES/POSEIDON satellite is maintained in a nearly circular, frozen orbit at an altitude of =1336 km. and an inclination of i = 66.4, which provides an exact repeat ground track every 127 revolutions and overflies two altimetry verifications sites. |
Feb 1, 1993
Folkner, W.M.; McElrath, T.P., 1993, "Determination of Radio-Frame Position for Earth and Jupiter from Ulysses Encounter Tracking", https://hdl.handle.net/2014/34917, ['AAS/AIAA Space Flight Mechanics', 'Pasadena, CA'], JPL Open Repository
Radio metric tracking data acquired from the Ulysses spacecraft about its encounter with Jupiter in February 1992 allow an accurate measurement of some components of the orbital elements describing the positions of the Earth and Jupiter with respect to extragalactic radio sources... |
Feb 1, 1993
Carson, S. C.; Carswell, J. C.; McIntosh, R. E.; Li, Fuk K.; Nghiem, S. V.; Lou, S. H.; Neuman, G.; McLaughlin, David J., 1993, "Low Wind Speed Radar Backscatter Measurements at C- and Ku-Band Obtained", https://hdl.handle.net/2014/34912, Journal of Geophysical Research, JPL Open Repository
Radar backscatter measurements collected at both C- and Ku-Band during the recent |
Feb 1, 1993
Williams, A.; Seidel, D.J.; Maleki, L., 1993, "Generation of 369.4 nm Radiation by Efficient Doubling of a Diode Laser", https://hdl.handle.net/2014/34801, New Orleans, LA, JPL Open Repository
The trapped ytterbium ion frequency standard under development at JPL is designed to supply ultra-stable reference signals to be used in spacecraft tests of general relativity and other science experiments. Only diode lasers meet the requirements of low power comsumption and smal... |
Feb 1, 1993
Sharma, P. K.; Trinh, E. H.; Man, K. F., 1993, "Containerless Processing of Molten Tin Samples in a Controlled Oxygen Environment", https://hdl.handle.net/2014/34899, Denver, Colorado, USA, JPL Open Repository
Contamination due to oxygen or oxide layer formation is a major concern in containerless processing of metallic melts. |
Feb 1, 1993
Fijany, Amir, 1993, "Fast Time and Space Parallel Algorithms for Solution of Parabolic Partial Differential Equations", https://hdl.handle.net/2014/34955, USA, JPL Open Repository
In this paper, fast time- and Space -Parallel agorithms for solution of linear parabolic PDEs are developed. It is shown that the seemingly strictly serial iterations of the time-stepping procedure for solution of the problem can be completed decoupled. |
Feb 1, 1993
Phillips, R., 1993, "Scientific Research on Space Station Freedom", https://hdl.handle.net/2014/35103, Boston, Massachusetts, USA, JPL Open Repository
No abstract provided |