Some second-order Ku-band site diversity results on a high elevation angle path in a rainy tropical region

2001 ◽  
Author(s):  
Q.W. Pan
Keyword(s):  
Elevation Angle ◽  
High Elevation ◽  
Second Order ◽  
Tropical Region ◽  
Site Diversity ◽  
Ku Band

Tropospheric scintillation prediction models for a high elevation angle based on measured data from a tropical region

2013 ◽  
Vol 105-106 ◽  
pp. 91-96 ◽  
Author(s):  
Nadirah Binti Abdul Rahim ◽  
Md. Rafiqul Islam ◽  
Mandeep J.S. ◽  
Hassan Dao ◽  
Saad Osman Bashir
Keyword(s):  
Prediction Models ◽  
Elevation Angle ◽  
High Elevation ◽  
Measured Data ◽  
Tropical Region ◽  
Tropospheric Scintillation

scholarly journals Modification of ITU-R Rain Fade Slope Prediction Model Based on Satellite Data Measured at High Elevation Angle

2012 ◽  
Vol 12 (5) ◽  
Author(s):  
Hassan Dao ◽  
Md. Rafiqul Islam ◽  
Khalid Al-Khateeb
Keyword(s):  
Prediction Model ◽  
Elevation Angle ◽  
Heavy Rain ◽  
High Elevation ◽  
Time Interval ◽  
Kuala Lumpur ◽  
Tropical Regions ◽  
Mitigation Techniques ◽  
One Year ◽  
Ku Band

Rain fade slope is one of fade dynamics behaviour used by system engineers to design fade mitigation techniques (FMT) for space-earth microwave links. Recent measurements found that fade slope prediction model proposed by ITU-R is unable to predict fade slope distribution accurately in tropical regions. Rain fade measurement was conducted  in Kuala Lumpur (3.3° N, 101.7° E) where located in heavy rain zone by receiving signal at 10.982 GHz (Ku-band) from MEASAT3 (91.5° E) on 77.4° elevation angle. The measurement has been carried out for one year period. Fade slope S parameter on ITU-R prediction model has been investigated. New parameter is proposed for the fade slope prediction modeling based on measured data at high elevation angle, Ku-band. ABSTRAK: Cerun hujan pudar adalah salah satu dinamik tingkah laku pudar yang digunakan oleh jurutera sistem untuk mereka bentuk teknik-teknik pengurangan pudar (FMT) bagi link gelombang mikro ruang bumi. Ukuran baru-baru ini mendapati bahawa cerun pudar ramalan model yang dicadangkan oleh ITU-R tidak mampu untuk meramalkan pengagihan cerun pudar tepat di kawasan tropika. Pengukuran  hujan pudar telah dijalankan di Kuala Lumpur (3.3° N, 101.7° E) yang terletak di kawasan hujan lebat dengan menerima isyarat pada 10,982 GHz (Ku-band) dari MEASAT3 (91.5° E) pada sudut ketinggian 77.4°. Pengukuran telah dijalankan untuk tempoh satu tahun. Parameter cerun pudar S pada model ramalan ITU-R telah disiasat. Parameter baru adalah dicadangkan untuk pemodelan cerun pudar ramalan berdasarkan data yang diukur pada sudut paras ketinggian, Ku-band.KEYWORDS: fade slope; ITU-R; fade mitigation techniques; sampling time interval

scholarly journals Accuracy of Doppler Determinations of Station Positions

1972 ◽  
Vol 48 ◽  
pp. 101-103
Author(s):  
R. J. Anderle
Keyword(s):  
Elevation Angle ◽  
High Elevation ◽  
Time Of Day ◽  
Satellite Observations ◽  
Standard Errors ◽  
Lower Elevation ◽  
Self Consistent

Locations of Doppler satellite observing stations have been revised to obtain a set which is more self-consistent and more consistent with the CIO pole. Residuals of satellite observations for 1970 have been analyzed using the new coordinates to determine mean and standard errors for five days of observations of latitude versus station, time of day, and elevation angle. The accuracy of the determination of latitude is about 4 meters at moderate and high elevation angles. But since more satellite passes occur at lower elevation angles, the accuracy of determination of a component of position based on five days of observation of one satellite is only about 2 meters.

scholarly journals Ku-Band Long Distance Site-Diversity (SD) Characteristics Using New Measuring System

2004 ◽  
Vol 52 (6) ◽  
pp. 1481-1491 ◽  
Author(s):  
T. Hatsuda ◽  
Y. Aoki ◽  
H. Echigo ◽  
F. Takahata ◽  
Y. Maekawa ◽  
...  
Keyword(s):  
Measuring System ◽  
Long Distance ◽  
Site Diversity ◽  
Ku Band
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