Description

Page : 2007

Sondrestrom Lidar Operation Log

Operator(s) : Christian, Have, Pedersen, Christian Have Pedersen
Purpose : Daq. on 532, X532 and 607 nm channels
Date(s) : 080625 - 080625
File(s) : L20080620_003 - L20080625_002
Comments : Had to attenuate (10dB) the 607nm channel. The PMT was tripping with the
current background conditions.
Logfile : l0806200.log

Setup:0

Page : 2008
[Variables]
Rayleigh Power=510 mJ

[0]
front end Iris=1.5mm
Rayleigh System=On
Rayleigh Field stop=0.5mm
Rayleigh path attenuation=0dB
Dye System=Off
Sodium Field stop=0.5mm
Etalon=Out
Daystar=4A_In
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0

Page : 2009

Sondrestrom Lidar Operation Log

Log Sheet 1 of 2
Operators : Christian Have Pedersen
Date(s) : 080625 - 080625
File(s) : L20080620_003 - L20080625_001

Files	Time [UT]	Comments	Cnt	S	Ope
L20080620_003	01:54:52	Start of experiment		0	cp
L20080620_003	01:56:46	Unfortunately a late start due to oversleeping operator		0	cp
L20080625_000	01:57:45	Converging beam into telescope now.		0	cp
L20080625_000	02:08:16	The 532nm channel works fine, but I am not getting anything		0	cp
		on the Raman channel, will be doing some troublehooting	50	0
		HV setting on the Hamamatsu 607nm PMT: 0.76
L20080625_000	02:23:10	Cabinet is closed again. I have put in a 10dB ND filter in		0	cp
		the 607nm path (On top of the chopper). Before it was
		shutting down, because of the high noise level. I am not
		sure of the functionality of the hamat. equipment, Yet, but
		the HV display was just "Blinking" in idle, when running
		the PMT without the 10 dB attn. in the path
L20080625_000	02:27:03	The 607nm profile does look weak, but it is there...	49	0	cp
		Will need to follow up on what to expect ?
L20080625_000	02:30:05	Just a few patches of clouds , otherwise perfect LIDAR		0	cp
		sky !
L20080625_000	02:32:44	6x10^3 spike from noise floor at ~710km in rayleigh profile		0	cp
		Only that one spike is visible now...
L20080625_000	03:00:37	Cnt ref.	48	0	cp
L20080625_000	05:04:05		54	0	cp
L20080625_001	05:29:30		0	0	cp
L20080625_001	05:51:11		44	0	cp
L20080625_001	06:28:10		48	0	cp
L20080625_001	07:14:23		54	0	cp

Logsheet:1

Page : 2010

Sondrestrom Lidar Operation Log

Log Sheet 2 of 2
Operators : Christian Have Pedersen
Date(s) : 080625 - 080625
File(s) : L20080625_002 - L20080625_002

Files	Time [UT]	Comments	Cnt	S	Ope
L20080625_002	07:51:12	Clearly a higher background noise now	51	0	cp
L20080625_002	07:52:24	Maybe not. The autoscale feature is playing tricks with me.		0	cp
L20080625_002	08:17:07	Slope on the trailing edge of the chopper in profile is		0	cp
		effected by the increased background signal.	45		cp
L20080625_002	08:19:18	Will soon be shutting down this experiment.		0	cp
L20080625_002	08:58:38		50	0	cp
L20080625_002	10:03:43	End of experiment	-5	0	cp