2024-03-28T16:32:53Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00033039
2022-12-19T04:08:40Z
80:4535:4817:4825
9:504:4538:4819:4826
Acquisition System of Airgun Firing Data using Microprocessors
マイクロプロセッサーを使用したエアガン発音時刻収集システム
斉藤, 誠
128819
笠原, 順三
128820
453
application/pdf
A very efficient, very precise, economical and compact Airgun Shotmark Recording System (ASR-80R) was developed. The purpose of ASR-80R system is to gain origin times of airgun or explosion for seismic reflection/refraction study using an ocean bottom seismometer. The system using a microprocessor can save approximately 340 of airgun firing time within ±2 miliseconds precision. The maximum recording time is 3 hours for 30 seconds airgun firing interval time by digital form. On shipboard, the firing times are stored in IC memory, and then these are loaded on an audio cassette tape by 1,200 Baud-rate. The loading time is very short: approximately 30 seconds. The data obtained on shipboard using the above system are transferred from IC memory of the ASR-80R to mini-floppy disk in the IDS-8000Z microcomputer system at a land-based laboratory.
departmental bulletin paper
東京大学地震研究所
1981-08-31
application/pdf
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
1
56
161
194
AN00162258
00408972
https://repository.dl.itc.u-tokyo.ac.jp/record/33039/files/ji0561009.pdf
jpn