DocumentCode :
750627
Title :
Some Observations on the Statistics of Beyond-the-Horizon Transionospheric Propagation from a Satellite
Author :
Pellegrini, P.F. ; Beni, P.
Author_Institution :
Italian National Res. Council,Florence,Italy
Volume :
25
Issue :
3
fYear :
1977
fDate :
3/1/1977 12:00:00 AM
Firstpage :
379
Lastpage :
383
Abstract :
The HF signals radiated (from heights above 
) by the first satellite orbited by the Peoples Republic of China (1970-34A) were monitored at a ground site in Florence, Italy. Beyond-Beyond-the-horizon reception with distances up to antipodality were repeatedly observed. Path loss improvement with respect to free space was typically 4 dB for distances of 12 000 km and 8 dB for distances of 20 000 km (antipodal focusing). A cross correlation receiver, designed to detect the most frequent tone (784 Hz) contained in the musical theme ("The East is Red") emitted by the satellite, provided a processing gain of 27 dB and made possible reliable reception for input SNR as low as -13 dB.
) by the first satellite orbited by the Peoples Republic of China (1970-34A) were monitored at a ground site in Florence, Italy. Beyond-Beyond-the-horizon reception with distances up to antipodality were repeatedly observed. Path loss improvement with respect to free space was typically 4 dB for distances of 12 000 km and 8 dB for distances of 20 000 km (antipodal focusing). A cross correlation receiver, designed to detect the most frequent tone (784 Hz) contained in the musical theme ("The East is Red") emitted by the satellite, provided a processing gain of 27 dB and made possible reliable reception for input SNR as low as -13 dB.Keywords :
HF radio propagation; Ionospheric propagation; Satellite communication, propagation; Data communication; Data mining; Intersymbol interference; Jitter; Nonlinear equations; Satellites; Statistics; Timing; Topology; Tracking loops;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOM.1977.1093824
Filename :
1093824
Link To Document :
