Nodding???
Wednesday, June 21, 2017 11:11 AM
Problem(s) Encountered:
The classic nodding problem returned while I was tracking a target around 2 hr west and a bit north of the horizon. It manifests as random north-south jerks of about 10-15 arcsec; in this case it always returned to the center position (it was not guided back -- the guider recenters things much more
slowly than what I saw. The nodding occurred intermittently and whole minutes went by without it.
Solutions:
Wind perhaps? I hope...