Description

Page : 555

Sondrestrom Lidar Operation Log

Operator(s) : E.Guðmundsson, J.Jørgensen, A.Merkel
Purpose : Align the daystar and characterize versus sza
Date(s) : 000608 - 000608
File(s) : L6080 - L6084
Comments : The skies are extremely clear. There was not a cloud in sight until around 10:00
am.

The beginning of this data run was dedicated to aligning the daystar. We tweeked
the daystar until we say about 20% of the orginal signal with out the daystar. We
checked to make sure that the position of the daystar was repeatable.

The last portion of the data run was dedicated to seeing how far into the morning
we could take good data with the daystar in. We left the daystar in the whole run,
even at high sza. We were able to recieve good data until around 11:00 am. We
could have still taken data but the SR430s overheated. This is good news. The
daystar works good enough for part time day capability.
Logfile : l0006080.log

Setup:0

Page : 556
[Variables]
Dye Power=92mJ
Rayleigh Power=540mJ

[0]
Iris=min_opening
Rayleigh System=On
Dye System=On
Daystar=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)

[1]
Iris=min_opening
Rayleigh System=On
Dye System=On
Daystar=In
Polarizer=In
HalfWave Plates=In
Rayleigh Filter=2:532(.5nm)

Logsheet:0

Page : 557

Sondrestrom Lidar Operation Log

Log Sheet 1 of 3
Operators : E.Guðmundsson
Date(s) : 000608 - 000608
File(s) : L6080 - L6084

Files	Time [UT]	Comments	Cnt	S	Ope
L6080	00:07:10	Start of experiment	11635	0
L6080	00:18:32	Sza=83.7 S~11000 N~1100	11546	0	EG
		Started to take data with no Daystar to get a reference
		before we chnage to daystar
L6080	00:19:38	system paused to change setup		0	EG
L6080	00:22:04	Resuming with setup 1 (daystar in) receiver is open		0	EG
L6080	00:22:41	UPS forgot to crank up the HV		0	EG
L6080	00:23:32	Incremented		0	EG
L6081	00:35:08	starting tweeking of daystar	1061	1	EG
	02:03:49	system paused to change setup, taking daystar out	2410	1	EG
		See if the position of the daystar is repeatable, c=2400, d=19
L6082	02:06:25	Incremented		0	EG
L6082	02:08:30	daystar out c=10676 d=333	10289	0	EG
L6082	02:11:08	system pause to put daystar back in		1	EG
	02:13:43	Yea, the daystar looks like it is repeatable, c=2450 d=15		1	EG
L6083	02:21:06	Leaving the daystar in for the whole data run from this point	2454	1	EG
L6083	02:53:15	I have been trying to maximize the sodium by tuning		1	EG
		Rayleigh eq. return from peak of sodium layer is around
		40km and I can't seem to get any more than that
L6083	03:09:26	Rayleigh Convergence mirror adjusted	1822	1	EG
L6083	08:07:07	Incremented output file just for fun		1	EG
L6084	08:10:34	SZA=75.8 and signal to noise is ~30	2568	1	EG
L6084	08:14:04	Just closed the receiver	1850	1	EG
L6084	08:16:25	lost bit of concergence by closing the receiver,		1	EG

Logsheet:1

Page : 558

Sondrestrom Lidar Operation Log

Log Sheet 2 of 3
Operators : E.Guðmundsson, J.Jørgensen, A.Merkel
Date(s) : 000608 - 000608
File(s) : L6084 - L6084

Files	Time [UT]	Comments	Cnt	S	Ope
L6084	08:16:59	but reconverged		1	EG
L6084	08:25:56	sza=74.5 and the sodium is still visible on the raw	2538	1	EG
		profile
L6084	08:48:06	Rayleigh Convergence mirror adjusted	2577	1	EG
L6084	09:45:58	Cirrus clouds have just moved in.		1	EG
L6084	09:59:57	SZA 65.5 and still seeing sodium on raw profile		1	EG
L6084	12:35:54	Both SR430s went down probably because of overheating		1	JJ
		it is very hot in the lidar room.
L6084	12:00:00	End of experiment		1	JJ

		snr=186.6 time=3:30 am sza=90.4 (time is GMT)
		snr=161 time =3:50 am sza =90.3
		snr=138 time=4:20 am sza =90.
		snr=133 time=4:30 am sza=89.4
		snr=115 time=4:45 am sza=88.9
		snr=105 time=5:00 am sza=88.4
		snr=86.7 time=5:25 am sza=87.3
		snr=75.5 time=5:52 am sza=85.9
		snr=57.41 time=6:17am sza=84.5
		snr=53.54 time=6:36 am sza=83.3
		snr=45.37 time=7:00am sza=81.6
		snr=44.7 time=7:15 am sza=80.4
		snr=36.67 time=7:38 am sza=78.6
		snr=32.76 time=7:50 am sza=77.6

Logsheet:2

Page : 559

Sondrestrom Lidar Operation Log

Log Sheet 3 of 3
Operators : A.Merkel
Date(s) :
File(s) :

Files	Time [UT]	Comments	Cnt	S	Ope
		snr=29.5 time=8:01 am sza=76.6
		snr=23.3 time=8:24 am sza=74.5
		snr=21.3 time=8:34 am sza=73.6
		snr=18.5 time=8:45 am sza=72.6
		snr=18.2 time=8:56 am sza=71.6
		snr=16.6 time=9:06 am sza=70.6
		snr=14.8 time=9:16 am sza=69.6
		snr=13.2 time=9:28 am sza=68.6
		snr=12.1 time=9:38 am sza=67.6
		snr=7.6 time=9:48 am sza=66.6
		snr=8.7 time=9:58 am sza=65.5
		snr=4.0 sza=63.7