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PR3 Alignment Work Record

19:33
A seismic event occurred at 19:33 in eastern Toyama Prefecture with a magnitude of M3.3. The script determined that PR3 alignment was necessary. We waited for the ground vibrations to settle.

19:56
Started PR3 alignment. Based on the T-CAM image, it was determined that the alignment was already satisfactory, so no manual adjustments were made to PR3. We proceeded to PRFPMI RF LOCK, but the camera image for Green-X was dark (see attached picture), and the transmitted light intensity on the nd-Scope graph was only around 0.05. When running the "LOCK stably" script, Incident No. 4 occurred as a response. Instead of submitting an OBSERVATION request, a DOWN request was made.

20:38
PR3 Alignment (Retry). Based on the T-CAM image, PR3's Pitch direction was manually adjusted (0.5 urad). The same was done for the Yaw direction, but ultimately, it was returned to the original position. During PRFPMI RF LOCK, the transmitted light intensity for Green-X was 0.4, and the camera image appeared as expected.

22:15 OBSERVING.

にほんご
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PR3アライメントの作業記録

19:33	ロックロス（直近の地震は 19:33 富山県東部 M3.3）
スクリプトがPR3アライメントが必要と判断した。
地面の振動が収まるのを待つ。

19:56	PR3アライメント開始
T-CAM画像をみて一致していると判断。PR3をマニュアルで調整しなかった。
PRFPMI RF LOCKまで進むが、Green-Xのカメラ画像が暗く ndーScopeのグラフで透過光量は0.05程度しかない(k-log 添付写真)。LOCK stablyのスクリプトを走らせるとインシデントNo.4と回答がでた。OBSERVASIONリクエストを出さずにDOWNをリクエストした。

20:38	PR3アライメント（やり直し）
T-CAM画像をみてマニュアルでPR3のPitch方向を修正（0.5urad）
同じくYaw方向も修正するが、最終的には元の位置に戻す。
PRFPMI RF LOCK時の Green-Xの透過光量は 0.4。カメラ画像では通常みられる形になった。

22:15	OBSERVING