ryan.crouch@LIGO.ORG - posted 11:07, Wednesday 30 April 2025 - last comment - 13:05, Wednesday 30 April 2025(84196)
HAMs 2, 3, 4, 5 HEPI yaw angles
I took a look at the YAW angle for the HAM HEPIs associated with PR2 (incorrect by me) (HAM2), SR2 (HAM4), and SR3 (HAM5) based on this previous alog83705. I believe the IPS channel units are in nrad, so the largest yaw angle I see is on HAM2 with 1800 nrad or 1.80 urad, HAM2 and 4 are different by ~ 1.10 urad.
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I added on the RESIDUALMON channels at Jims recommendation which directly tells you the error from the reference location.
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Here's HAM3, 0.392 urad as seen by HEPI
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