[Jinshui Tian, Yuli Liang, Dan Chen]

On 2026/07/09, we updated the Pcal Reconstruction model for both EX and EY so the output Pcal beam position is consistent with the calculation in the paper: Performance of the KAGRA photon calibrators during the fourth joint observing run with LIGO and Virgo - IOPscience.

We deployed the updated model files into the production environment via k1ctr27 (replacing the original files) and confirmed the GRD and SDF statuses.

We then recompiled, installed, and restarted the front-end models as follows:
EX Model (k1ex0):

ssh k1ex0
cdscode 
make k1calex 
make install-k1calex 
startk1calex

EY Model (k1ey0):

ssh k1ey0
cdscode 
make k1caley
make install-k1caley
startk1caley

From ndscope, observable value steps were noted on the following channels:
EX Channels: K1:CAL-PCAL_EX_A_X_MON & K1:CAL-PCAL_EX_A_Y_MON at GPS: 1467955200 s
EY Channels: K1:CAL-PCAL_EY_A_X_MON & K1:CAL-PCAL_EY_A_Y_MON at GPS: 1467956800 s

We plan to calculate and compare the pre- and post-update channel data tomorrow.