AbstractPropagation experiments using the following geostationary satellites, Engineering Test Satellite-II (ETS-II), Medium-Capacity Communication Satellite for Experimental Purposes (CS), Medium-Scale Broadcasting Satellite for Experimental Purposes (BSE) and Experimental Communication Satellite (ECS), are being conducted by Radio Research Laboratories (RRL) with the co-operation of National Space Development Agency of Japan (NASDA), Nippon Telegraph and Telephone Public Corporations (NNT) and Japan Broadcasting Corporations (NHK).The Experimental Communication Satellite (ECS) will be launched into the geostationary orbit in February 1980. This satellite will then be used for further propagation experiments.The various and numerous propagation data obtained by using these satellites is being collected from many places all over Japan.The summary of the propagation experiments conducted at the main station is as follows. (a) Experimental periods covered in this paper are about 1 year for ETS-II and CS, and six months for BSE.(b) The percentages of time in which measured attenuation exceed 5, 10 and 15 dB are 0.7, 0.3 and 0.15% respectively at 34.5 GHz (ETS-II), 0.08, 0.016 and 0.008% respectively at 19.45 GHz (CS), 0.025, 0.0025 and 0.0009% respectively at 11.7125 GHz (BSE), and 0.02, 0.0023 and 0.001% respectively at 11.5 GHz (ETS-II).(c) Duration of attenuation exceeding 30 dB at 34.5 GHz is less than 50 min with the occurrence probability of 0.013% for a one year period. Attenuation exceeding 6 dB at 11.5 GHz and the one exceeding 10 dB at 19.45 GHz are 0.0025% (8 min in a year) and 0.015% (10 min in three months).(d) In the cumulative distributions of XPD (Cross Polarization Discrimination), values of XPD exceeding the percentages of time, 0.3, 0.1, 0.03 and 0.01% are 25, 22, 19 and 17 dB respectively at 34.5 GHz, 28, 23, 20 and 16.5 dB respectively at 19.45 GHz and 33, 29, 26 and 24 dB respectively at 11.5 GHz.This paper presents an outline of the propagation experiments carried out by using ETS-II, CS, BS and ECS, and propagation characteristics of radio waves mainly above 10 GHz at the main station (Kashima Branch, RRL).
Propagation characteristics for millimeter and quasi-millimeter waves by using three Japanese geostationary satellites
Acta Astronautica ; 7 , 11 ; 1287-1305
1980-02-05
19 pages
Article (Journal)
Electronic Resource
English
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