Three-Year Measurement by VSAT System and CCIR Estimation for Rain Attenuation in Ku-Band Satellite Channel

Jian KANG  Hiroshi ECHIGO  Koichi OHNUMA  Shigeo NISHIDA  Risaburo SATO  

IEICE TRANSACTIONS on Communications   Vol.E79-B   No.5   pp.722-726
Publication Date: 1996/05/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
VSAT,  rain attenuation,  rainfall rate,  CCIR model,  short-time-interval measurement,  

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The reception level of a round-trip signal from a VSAT (Very Small Aperture Terminal) was monitored continuously for three years starting October 1991.For these experimental measurements, a commercial satellite channel (up-link 14GHz/downlink 12GHz, bandwidth 100kHz) was used and rainfall was measured simultaneously. Data gathering time interval of 2 seconds was adopted to elucidate very rapid variation and lower percentage statistics. In this paper, attenuation due to rainfall is shown using the data obtained in this three-year period. It is shown that so far, the measured rain attenuation agrees very well with the values estimated using the CCIR model, and limits the range where the cumulative time exceeds 0.01%, even for our VSAT system in Tagajo, Miyagi Prefecture, Japan.