|
|
 |
 |
|
|
|
Selected Navigations:
Author >
[x]
|
Sort results by:
|
|
|
There are a total of 16 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
|
Research in LMSS propagation
Author(s): Barts, R. M.; Stutzman, W. L.; Pratt, T.
Abstract: The Virginia Tech Satellite Communications Group has participated in the Land Mobile Satellite System (LMSS) program through JPL sponsorship since 1985. Involvement has mainly been in modeling and simulation of propagation ...
NASA Center: NASA (non Center Specific)
Publication Year: 1989
Added to NTRS: 2005-08-25
Accession Number: 93N21400; Document ID: 19930012211; Report Number: JPL-9950-1383, NAS 1.26:191915, NASA-CR-191915, SATCOM-89-8
S band radar differential reflectivity measurements in multiple polarization planes along satellite slant paths
Author(s): Marshall, R. E.; Pratt, T.; Manus, E. A.; Stapor, D. P.; Andrews, J. H.
Abstract: A novel approach to making differential reflectivity measurements in multiple polarization planes has been proposed. This paper describes a versatile technique using a mechanical polarization switch and the systematic errors ...
NASA Center: NASA (non Center Specific)
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 84A20758; Document ID: 19840037971
Results of the VPI&SU Comstar experiment
Author(s): Andrews, J. H.; Ozbay, C.; Pratt, T.; Bostian, C. W.; Manus, E. A.; Gaines, J. M.; Marshall, R. E.; Stutzman, W. L.; Wiley, P. H.
Abstract: This paper summarizes annual and cumulative attenuation data, depolarization data, and associated local rain rate distributions obtained with the Comstar family of 19.04- and 28.56-GHz satellite beacons during the years ...
NASA Center: NASA (non Center Specific)
Publication Year: 1982
Added to NTRS: 2004-11-03
Accession Number: 83A12610; Document ID: 19830031392
Hysteresis effects in instantaneous frequency scaling of attenuation on 20 and 30 GHz satellite links
Author(s): Sweeney, D. G.; Pratt, T.; Bostian, C. W.
Abstract: It has been observed with 20/30 GHz satellite beacon measurements that the ratio of 30 GHz to 20 GHz attenuation changes during some fade events. This ratio displays a hysteresis effect. This effect can be explained by a ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1992
Added to NTRS: 2004-11-03
Accession Number: 92A24489; Document ID: 19920041865
Results of a three-year 11.6 GHz low-angle propagation experiment using the SIRIO satellite
Author(s): Bostian, C. W.; Pratt, T.; Stutzman, W. L.
Abstract: The results of three years of attenuation and depolarization measurements at 11.6 GHz on a 10.7 deg elevation angle downlink from the SIRIO spacecraft are summarized. Cumulative distributions and worst-month statistics for ...
NASA Center: NASA (non Center Specific)
Publication Year: 1986
Added to NTRS: 2004-11-03
Accession Number: 86A26242; Document ID: 19860041504
Ice depolarization on low-angle 2 GHz satellite downlinks
Author(s): Stutzman, W. L.; Bostian, C. W.; Tsolakis, A.; Pratt, T.
Abstract: The impact of ice depolarization on the statistical performance of satellite downlinks were investigated. Propagation data recorded during 1979 and 1980 to see what impact of ice depolarization on link performance were ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 84N24946; Document ID: 19840016878
Attenuation and depolarization of low angle and site diversity slant paths
Author(s): Pratt, T.; Bostian, C. W.; Stutzman, W. L.; Yon, K.; Howard, T.
Abstract: This paper reviews some experimental data collected over a three year period at Blacksburg, VA. Attenuation and crosspolarization were measured on two 10.7 degree elevation angle paths to the SIRIO satellite, with a baseline ...
NASA Center: NASA (non Center Specific)
Publication Year: 1983
Added to NTRS: 2004-11-03
Accession Number: 85A34467; Document ID: 19850052316
Olympus propagation and communication experiments in the US
Author(s): Davarian, F.; Pratt, T.
Abstract: The participation of the United States in Olympus experiments is outlined. These include, basic propagation measurement, the Cooperative Data Exchange Experiment (CODE), a rain scatter interference measurement, a small scale ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 89N29628; Document ID: 19890020257
The VPI&SU multiple polarization plane ZDR radar - The OCTOPOD radar
Author(s): Andrews, J. H.; Pratt, T.; Porter, R. E.; Imrich, D. M.
Abstract: The 'OCTOPOD' radar extends the concept of differential reflectivity (ZDR) to multiple polarization planes, so that ZDR measurements can be made in any pair of orthogonal linear polarizations. This allows the mean canting ...
NASA Center: NASA (non Center Specific)
Publication Year: 1983
Added to NTRS: 2004-11-03
Accession Number: 85A28735; Document ID: 19850046584
Instantaneous diversity gain in 10-30 GHz satellite systems
Author(s): Towner, G. C., III; Bostian, C. W.; Stutzman, W. L.; Pratt, T.
Abstract: As usually defined, diversity gain is a statistical measure which conveys little or no information about the instantaneous behavior of site-diversity reception in a satellite communications system. A new quantity called ...
NASA Center: NASA (non Center Specific)
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 84A26869; Document ID: 19840044082
|
|
|
|
|
