MDM Trouble Report for 2016 Apr 28 Telescope: 1.3m Observer(s): Yiseul Jeon, Jaejin Shin (Seoul National University) Instrument: Templeton Problem(s) Encountered: During whole night, the telescope failed to guide for targets located on 'west', 'south', and 'zenith'. For example, a target (on west) with HA=+1:43, ra=08:49, dec=+28:24, alt=67, az=268, airmass=1.07 showed N/S oscillation as below (north up, east left). https://www.dropbox.com/s/fvck2177o5fwuns/osci_13.png?dl=0 However, a targets (on north) with HA=1:44 ra=9:36 dec=65:10 alt=53.2 az=341.9 was well guided. The wind speed was ~10mph and direction is 300 deg. Is this due to the wind or other problems? ------------------------------ Submitted on 2016 Apr 29 [5:48:55]