41,621 to 41,630 of 42,163 Results
Apr 12, 1993
Flynn, David J.; Fowski, Walter J.; Kia, Tooraj, 1993, "Flight Performance of TOPEX/POSEIDON Star Tracker", https://hdl.handle.net/2014/35363, Orlando, Florida, USA, JPL Open Repository
The TOPEX/POSEIDON spacecraft was launched on August 10, 1992. This paper will present data on the measured performance of the ASTRA Star Trackers supplied by Hughes Danbury Optical Systems (HDOS) for this satellite. |
Apr 12, 1993
Hartmayer, R.; Jackson, S.; Johnston, A., 1993, "Space Environmental Effects on Optical Fiber Cables", https://hdl.handle.net/2014/35060, Orlando, Florida, USA, JPL Open Repository
No abstract provided |
Apr 12, 1993
Sauer, Carl G.; Yen, Chen-Wan L., 1993, "Planetary Mission Capability of Small Low-Power Solar Electric Propulsion Systems", https://hdl.handle.net/2014/36266, Laurel, Maryland, USA, JPL Open Repository
There is currently a vigorous investigation underway of low-cost planetary missions using small, inexpensive spacecraft. In order to keep the total mission costs down either a medium class launch vehicle such as a Delta II or an intermediate class launch vehicle such as an Atlas... |
Apr 12, 1993
Kursinski, E.; Hajj, G.; Hardy, K., 1993, "Atmospheric Profiles from Radio Occultation Measurements of GPS Satellites", https://hdl.handle.net/2014/35290, ['International Society for Optical Engineering', 'Orlando, Florida, USA'], JPL Open Repository
Atmospheric profiles can be retrieved with techniques utilizing measurements of the propagation delay of signals from Global Positioning System satellites observed by one or more receivers in low earth orbit. |
Apr 12, 1993
Moyd, Katherine I., 1993, "Use of CCSDS Telemetry Standards for Low Cost Planetary Missions", https://hdl.handle.net/2014/36337, Laurel, MD, USA, JPL Open Repository
No abstract provided |
Apr 11, 1993
Chen, Chien-Chung; Homayoon Ansari; Lesh, James R., 1993, "Precision Beam Pointing for Laser Communication System Using a CCD-based Tracker", https://hdl.handle.net/2014/35138, Orlando, Florida, USA, JPL Open Repository
Spatial acquisition and precision beam pointing functions are critical to spaceborne laser communication systems. A recent system study indicated that a single high bandwidth CCD detector can be used to perform both spatial acquisition and tracking functions. Compared to previous... |
Apr 9, 1993
Krisher, T. P., 1993, "The Parametrized Post-Newtonian Gravitational Redshift", https://hdl.handle.net/2014/35215, Physical Review D, JPL Open Repository
A derivation of the gravitational redshift effect to order c ^(-4) is presented. The calculation isperformed within the framework of the parametrized post-Newtonian formalism for analyzing metrictheories of gravity, which includes corrections to second- order in the Newtonian pot... |
Apr 9, 1993
Woo, R., 1993, "Solar Cycle Variation of Interplanetary Disturbances Observed as Doppler Scintillation Transients", https://hdl.handle.net/2014/35209, Journal of Geophysical Research, JPL Open Repository
Interplanetary disturbances characterized by plasma that is more turbulent and/or moves faster than the background solar wind are readily detected as transients in Doppler scintillation measurements of the near-Sun solar wind. |
Apr 7, 1993
Gautier, T. N., 1993, "Cirrus and Future Space Based Astronomy", https://hdl.handle.net/2014/35845, Tucson, AZ, JPL Open Repository
Astronomical observations from space make possible observations of sensitivity and spatial resolution impossible in the past. This increase in sensitivity will both make possible the observation of new phenomena and will bring observations against limitations not encountered befo... |
Apr 7, 1993
Werner, M.W.; Gauthier, T. N. III.; Cawlfield, T., 1993, "Stability of Small Grains in HII Regions and Reflection Nebulae", https://hdl.handle.net/2014/35549, Tucson, AZ, JPL Open Repository
We have analyzed IRAS data to assess the relative amounts of small and large grains in HII regions and reflection nebulae. Our most important finding is that no evidence for small grain destruction is seen in reflection nebulae, even for [high] values of the radiation energy dens... |