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Communications and radio determination system using two geostationary satellites. I. System and experiments

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7 Author(s)
Morikawa, E. ; Commun. Res. Lab., Minist. of Posts & Telecommun., Kashima, Japan ; Miura, R. ; Matsumoto, Y. ; Kimura, K.
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We developed two types of hybrid terminals that can provide both satellite communication and position determination services in one system. One terminal uses the single channel per carrier (SCPC) technique and the other uses the spread spectrum (SS) technique. To evaluate the performance of the two systems, we carried out experiments in Japan and in the Pacific Ocean using two geostationary satellites, ETS-V (150°E) and Inmarsat (180°E). The ranging accuracy between the mobile terminals and the base station via the satellites was found to be about 200 m using the SCPC system and about 10 m using the SS system. The measured positioning accuracy was about 1 km in the SCPC system and about 600 m in the SS system when experiments were carried out near Japan. The experimental results show that the positioning errors were mainly caused by the orbital determination errors of the two satellites. Presented here are the configurations and features of the SCPC and SS terminals, the experimental system, and the experimental results.<>

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:31 ,  Issue: 2 )