Description

Page : 2075

Sondrestrom Lidar Operation Log

Operator(s) : Katelynn, Greer, Katelynn Greer
Purpose : Routine Data Collection and Background supression demonstration
Date(s) : 080808 - 080809
File(s) : L20080808_005 - L20080809_001
Comments : Routine Data Collection. A weak NLC was observed for about 2 hours. However,
NLCs could be seen in the North and East by eye (and camera) for much longer.
The HWPs were optimized again. Matt Hayman's demonstration of background
rejection was performed at the very end of the night.
Logfile : l0808090.log

Setup:0

Page : 2076
[0]
front end Iris=not_installed
Rayleigh System=On
Rayleigh Field stop=0.5mm
Rayleigh path attenuation=0dB
Dye System=Off
Sodium Field stop=0.5mm
Etalon=Out
Daystar=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0

Page : 2077

Sondrestrom Lidar Operation Log

Log Sheet 1 of 2
Operators : Katelynn Greer
Date(s) : 080808 - 080809
File(s) : L20080808_005 - L20080809_000

Files	Time [UT]	Comments	Cnt	S	Ope
L20080808_005	23:35:21	Start of experiment		0	KRG
		SP Energy:5400 mJ; Counts=20550
		Raman PMT hv =0.600
		Strong Signal Induced Noise on SP, Solar Zenith = 87	456
		I will wait for the solar zenith to increase before I do
		anything with the SP signal
	00:27:12	Starting to look better... Solar Zenith = 91	478	0	KRG
	01:03:32	Solar Zenith=93.3		0	KRG
	01:16:00	Evidence of Signal Induced noise up to 90 km on SP	490	0	KRG
	01:32:27	Ok, I can work with signal; Solar Zenith = 94.85		0	KRG
	01:33:38	Beginning Matt Hayman's Background Rejection Exp		0	KRG
		Original TX pos =29, offset = 43; RX pos=62, offset=48
	01:35:17	Begin Period 1: Both Compensator and G-T IN		0	KRG
		BigSky lasers off
	01:43:44	Hmmm, now I'm thinking that there might be something		0	KRG
		up around 80-85km- postponing Experiment
		Turning BigSky lasers back on
	01:46:05	Flipping routine on	494	0	KRG
	02:01:50	NLC detection		0	KRG
L20080809_000	02:21:07		499	0	KRG
	02:25:52	Optimizing TX HWP, original offset = 43		0	KRG
		BigSky lasers off, Suntracking w/o flipping
	02:36:24	TX pos = 39; Az=-12.75, offset =45.375		0	KRG
L20080809_000	02:49:30	NLCs are visible by eye in the East		0	KRG

Logsheet:1

Page : 2078

Sondrestrom Lidar Operation Log

Log Sheet 2 of 2
Operators : Katelynn Greer
Date(s) : 080809 - 080809
File(s) : L20080809_000 - L20080809_001

Files	Time [UT]	Comments	Cnt	S	Ope
	03:15:05		507	0	KRG
	03:41:51		509	0	KRG
	03:44:09	Looks like the NLC is dissipating above us		0	KRG
L20080809_000	03:57:06	NLCs are still visible by eye in the North	505	0	KRG
	04:45:42		501	0	KRG
L20080809_001	05:05:20		508	0	KRG
	05:34:10		492	0	KRG
	06:04:48		502	0	KRG
	06:41:29	Attempting Matt's Experiment again		0	KRG
		Turning off BigSky lasers, HWP already optimized
	06:42:37	Turning On suntracking routine		0	KRG
	06:47:04	Begin Period 1		0	KRG
	06:52:05	Removing Compensator and then optimize both HWPs		0	KRG
	07:02:22	Begin Period 2		0	KRG
		RX pos=351; TX pos=120; Az=50.65
	07:08:32	End Period 2		0	KRG
		Removing Glenn-Thompson Polarizer
	07:11:14	Begin Period 3		0	KRG
L20080809_001	07:18:56	End Period 3		0	KRG
L20080809_001	07:28:18	End of experiment		0	KRG