Palomar LGSAO Engineering Summary 09/22/05 UT

Goals:
1. Close high-order loop on LGS.
2. Demonstrate pointing laser off zenith.
3. Demonstrate reliable LOWFS focus measurement.
4. Record first LGS-corrected images.

Plan:
1930-2100 Check LLT boresighting, image quality.
2100-2130 Align laser to LLT.
2130-2330 Project laser at zenith, characterize LGS.
2330-0100 Close HO loop on LGS.
0100-0200 Close UTT loop on LGS.
0200-0300 Demo LOWFS focus measurement.
0300-0530 congingency.

Daytime results:
Added OD2 filter in front of Q1.
Laser producing 7.2W on bench, image quality appears good.

Night log:
1920 Beginning LLT Pulnix optical alignment.
2000 Going to sky to check LLT boresighting.
2005 Pointing at Vega.  Star not immediately visible in LLT Pulnix.  Found Pulnix pupil misaligned to LLT iris.
2030 LLT pointing off by several arcminutes.  Adjusting pointing.
2040 DSPs appear not to be saving telemetry.  DSPs need reboot.
2045 LLT aligned.  Switching to narrow-field mode for image quality test.
2050 Focussing LLT.  Primary immediately tilted.  Trouble-shooting.  Rough manual focus is 5910.  Saved image: llt_focus_1.fits.  FWHM=4.6".
2050 K seeing from PHARO: ~1.0"
2100 Going back to wide-field mode to tune up LLT pointing.
2130 Checking image quality again in narrow-field mode.  Saved images 2-4.  FWHM~3.2".
2145 Performing full focus run on LLT:
ao_focus_loop, 5650, 50, 8, 'llt', 'vega_focus_1', 'vega_sky_1', time_to_avg=10.
	Best focus is >5800, with FWHM<40*0.07.
2200 Bringing LLT field lens down to fix retaining ring.
2240 RD and CS heading back up to LLT for further image quality optimization.
2255 Unable to mount collimating laser on LLT primary.
2300 Moving to Deneb for LLT collimation.  K seeing ~1.0" during whole test.
	First focus run: deneb_focus_3_focus.dat. best FWHM=2.81", foc=5790
	0.25 turns West: deneb_focus_4_focus.dat. best FWHM=3.04", foc=5820
	0.25 turns East: deneb_focus_5_focus.dat. best FWHM=2.73", foc=5830
		foc=5600, 10s integ: deneb_focus_7_focus.dat
		foc=6040, 10s integ: deneb_focus_7_focus.dat
		foc=5828, 3x10s integ: fwhm=2.8, 3.0, 2.6
	0.5 turns S, 0.25 E: foc=5828, image #10, FWHM=42.0
		deneb_focus_11_focus.dat: best FWHM=3.2".
	0.5 turns N, 0.25 E: foc=5828, FWHM=2.7"
		deneb_focus_12_focus.dat: best FWHM=2.5".
	0.5 turns N, 0.75 E: deneb_focus_13_focus.dat, best FWHM=2.5"
	0.5 turns N, 0.5 E: deneb_focus_14_focus.dat, best FWHM=2.4"
	1.0 turns N, 0.5 E: deneb_focus_15_focus.dat. best FWHM=2.5"
	0.75 turns N, 0.5 E: deneb_focus_17_focus.dat. FWHM=2.7",2.4",2.3"
0045 Flipped LLT Pulnix field lens.
	Deneb_focus_18. FWHM=2.5"
0100 Projecting laser at low power in dome to align BTO.
0130 BTO aligned, adjusting laser focus.  Beam shifted with focus adjustment.
0210 Projecting in dome at high power.  Realigning BTO.
0225 Adjusting M3.  +x is up on Pulnix camera view.  +y is left.
0235 Preparing to propagate on sky.  All-sky camera giving spurious detections.  Jumpering it.
0245 Refocused telescope by +0.20 mm to 57.17mm. Acq_z=13750.
0250 Seeing 0.75" in K.
0300 Propagating.  Shuttered by BTO - no light on Q3.
0310 Steering beam into LLT visually from prime focus
0325 Propagating. Shuttered by BTO - Q3 must be misaligned.  Bypassing BTO.
0335 Propagating. Beam looks good.
	Background (detuned): lgs_detunned_1.fits
     Acq focus run: lgs_acq_1_focus.dat.  Not clear where focus is.
	Best foci: LLT:5250, Acq:11250.  FWHM=17.8 pix (2.62", using 0.147"/pix)
	Best-focus image:lgs_best_focus_1_5250.fits
	Raleigh backgound: lgs_best_focus_sky.fits
0410 Acquiring LGS on HOWFS
0418 Recording 50Hz sky on Raleigh: po050hz68g077b
     Median counts ~1000 at 50Hz
0422 Focusing HOWFS on Na layer
	Closing TT loop on LGS.  Testing by offsetting llt_a.  TT sees it.
	Having trouble recentering LGS on HOWFS.
0430 Shuttered for FAA compliance.
0434 Moving to Tycho-2 2362-175901 (vmag=10.18, b-v=0.32) for photometric & seeing calibration.
	PHARO open-loop seeing: 1.08"
	Acq images: tycho2362_1, and _2, FWHM=9.7 pix (1.6" using 0.162"/pix)
0500 Attempting observations of a geosychronous satellite.  Not found.
0600 Calling night.