Utilization of an NNSS receiver in the explosion seismic experiments on the Prince Olav Coast, East Antarctica 1. Recovered UTC

• Main Authors: 渋谷 和雄, 神沼 克伊, Kazuo Shibuya, Katsutada Kaminuma
• Format: Report
• Language: English
• Published: 国立極地研究所 1982
• Subjects: 550.34:551.2; Antarctic; The Antarctic; East Antarctica; Prince Olav Coast; Antarc*; Antarctica
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=8321; http://id.nii.ac.jp/1291/00008321/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=8321&item_no=1&attribute_id=18&file_no=1

商用の400MHz 1波のNNSS受信器を改造し, 世界協定時を復元して, それと同期した1秒1パルス割合のBCDパルスを発生できるようにした。この受信器の性能試験を行った結果±5msの総合的な精度で標準時計が得られることがわかった。この受信器を用いた時刻較正によって, 第21次南極地域観測隊がプリンスオラフ海岸で行った3回の爆破実験のショットタイムが5ms精度で決められたほか, 雪原の劣悪な作業環境下でも, 実験に用いられた合計30台の時計の時刻あわせを0.01秒以内で行うことができた。 A commercial 400MHz NNSS receiver was altered to recover and generate UTC synchronized BCD pulses of one pulse per second. The altered NNSS receiver was tested and ascertained that it could generate UTC within an overall accuracy of ±5ms in the antarctic region. By the aid of this NNSS receiver, shot times of explosion seismic experiments, which were made by the 21st Japanese Antarctic Research Expedition on the Prince Olav Coast, East Antarctica, could be determined within an overall accuracy of 5ms. Timing of a total of 30 clocks in the experiments could also be made within an accuracy of 0.01s under the bad operational conditions on a snow field.