A Satellite EPIRB with High Average Reception Level at COSPAS-SARSAT Applying an Improved Antenna

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  • 衛星平均受信電力を高めるアンテナを用いた衛星系イーパブ
  • エイセイ ヘイキン ジュシン デンリョク オ タカメル アンテナ オ モチイタ

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Two frequency satellite EPIRB has been globally common, but is authorized, since November 1994 in Japan. A new satellite EPIRB applying a new antenna with simple configuration is developed, which has a unique vertical pattern to reduce defraction wave from edges of a common disk reflector for pattern measurement at COSPAS-SARSAT type approval test. An average reception level of the EPIRB measured at SARSAT satellites is increased by about 3. 5dB under simultaneous comparison between the new one and a reference EPIRB installed at CNES Toulouse for the system calibration. The new EPIRB is expected improving immunity against un-desired signal as well as S/N ratio for Doppler frequency measurement. One sigma accuracy of 410m based on an independent positioning category is obtained during satellite qualification test.

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