Technical Observing: 01 December 2012 UT

Observer: DMiller (Tucson), JGuerra, JChristou (LBTO)
Telescope Operator: DHuerta (LBTO)
Software Support: TLeibold (Tucson)
AO Support: DMiller (LBTO)
Telescope Support: MMidkiff (LBTO)
Instrument Support: JMorris (LBTO)



LBC Focal Plane Tilt

00:45 Open Dome, configured for the two LBC's

01:00 John tries to collect LBC data to determine shim size to improve focal plane tilt, but seeing is too bad.

01:15 Reconfigure for Gregorian observations

AO Tests

01:45 JC and JC confirm that the SX CCD39 equalizing routines that Alfio installed during the day fix the problem. This problem had been fixed on the DX side in October, but the sw had not been updated on the SX side.

03:15 David send presets to high and low stars to make sure new Sext Act Opt converges for different conditions

Collimation with High Order Zernikes

03:35 Doug turn on High order, Z12-22, corrections to make sure signs are correct.

04:15 Confirm they are correct sign. Now need to make the scale factors correct.

05:00 The quick calculated values are in and close to correct

05:10 Start zernike_collect, LIMIT=300., /VERBOSE with EXP=10 hardwired

05:20 set EXP=6 and START=6. Take 10 iteration and not converged. Seeing is a bit worse

05:30 LIMIT=400.

05:35 LIMIT=500.

05:40 OK, seeing settled down, data collection moving along

08:16 setHotspot left -x XX -y YY
  • If XX is positive delta then all SH spots move to the right
  • if YY is positive delta then all SH spots move down

08:54 Problems collimating at 48 elevation, rotator angle = 330, vignetting of some SH spots, SH spots shifted to the top of their subaps
  • getHotspot left 225 210
  • setHotspot left -x 215 -y 230 centered them

09:39 Correcting high order modes (Z12-22) helps for not dim stars and little vignetting. However HO modes can make the collimation worse.

-- JohnHill - 01 Dec 2012
Topic revision: r4 - 01 Dec 2012, DougMiller
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