German Schumacher provided the following simplified model, along with the attached "opticalpath.pdf" diagram, and says that final values will need to be computed/calibrated with actual observations.

We have an effective unobstructed optical path diameter of 9.44 m, enclosed in a rectangle size 11 m in azimuth and 10 m in elevation. An error in azimuth position of 1 deg gives a displacement of 0.29 m in azimuth. An error of 1 deg in elevation gives an error of 0.22 m in elevation. This computation is based on a circle diameter of 33 m in azimuth and a circle diameter of 25 m in elevation. With those values, an obstruction percentage could be calculated.

This works out to the same simple model as used by AT dome trajectory, with the addition of a window on elevation. I attached a script that computes these parameters:

partial_vignetting_az=2.69

partial_vignetting_el=1.27

full_vignetting_az=35.24

full_vignetting_el=44.18

Other changes:

• Fix a bug in ts_atdometrajectory.
• Update build files in ts_mtdometrajectory and ts_atdometrajectry
• Purge old version directories from ts_config_mttcs.
• Rename some fields in ATDomeTrajectory config to match new names in MTDomeTrajectory (_partial instead of _min, _full instead of _max).
• Purge old version directories from ts_config_attcs.
• Update ts_config_attcs and ts_config_mttcs to use ts_pre_commit_conf and the new Jenkinsfile shared library.
• Fix a few tests in ts_config_attcs and ts_config_mttcs.

Pull requests:

• https://github.com/lsst-ts/ts_mtdometrajectory/pull/33
• https://github.com/lsst-ts/ts_config_mttcs/pull/58
• https://github.com/lsst-ts/ts_atdometrajectory/pull/53
• https://github.com/lsst-ts/ts_config_attcs/pull/31

Reviewed on GitHub.

Tagged:

• ts_mtdometrajctory v0.12.0
• ts_config_mttcs v0.11.0
• ts_atdometrajectory v1.11.0
• ts_config_attcs v0.12.0