夜間の電離層吸収 : II.狭帯域受信機による南極観測船上電界強度測定(日本南極地域観測隊の報告)

• Main Authors: 若井 登, 藤井 周, 宮本 善行, Noboru WAKAI, Shu FUJII, Yoshiyuki MIYAMOTO
• Format: Report
• Language: Japanese
• Published: 電波研究所平磯支所 1971
• Subjects: 551.510.535/.537; Antarctic; Antarc*
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=7624; http://id.nii.ac.jp/1291/00007624/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=7624&item_no=1&attribute_id=18&file_no=1

Narrow-band receivers developed for receiving exclusively the JJY signal in the presence of interferences by the other standard frequency waves with an identical carrier frequency are used since 1967 for the observation of HF radio wave absorption on board the ship of the Japanese Antarctic Research Expedition. This paper summarizes the technicality of the receiver, and presents the results of measurements obtained in the 10th JARE (Nov., 1968-Apr., 1969) by means of the receiver. Dependence of the ionospheric absorption in the nighttime on the solar activity was confirmed quantitatively by the same analysis as that given in Part I (1971) of this paper.