Subject: 2.5m obslog 20250901 (SJD 60920)
From: kpan@apo.nmsu.edu
Date: Tue,  2 Sep 2025 09:56:59 +0000 (UTC)
                       APACHE POINT OBSERVATORY SDSS 2.5M
                                 OBSERVING LOG
                          Monday September 01, 2025
                                  (SJD 60920)
----  Observing Team ----
Kaike Pan
---- Observing Plan ----
Ventilate the telescope driving surface.
---- Observing Summary ----
Ventilate the telescope for 7 hours.
Installed the newest version Boson.
I tested whether the sign of scale in rotator fiducial table changes the way fiducials are crossed. I changed the sign of the scale from + to -, loaded it to mcp, made the new table effective, slew the roator axis, it doesn't change things. When the rotator moves from 0 to -185 degrees, the fidcuial crossed are still 78, 77, 76, ..., 43, then 118, 117, 116, the sequence of crossed fiducials is the same as the one with the positive rotator scale. I reversed the rotator fiducial table back.