Description

Page : 658

Sondrestrom Lidar Operation Log

Operator(s) : E.Gudmundsson, J.Jørgensen, E.Guðmundsson
Purpose : Routine data collection
Date(s) : 000929 - 000929
File(s) : L9290 - L9292
Comments : Sloping background detected. Looked as if heavy background was loading the HV
unit on the Rayleigh channel. PMT baseline looked very flat on the scope. The
sloping background seemed to be there even if the SP laser was not running.
Logfile : l0009290.log

Setup:0

Page : 659
[Variables]
Dye Power=100mJ
Rayleigh Power=540 mJ

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

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

Logsheet:0

Page : 660

Sondrestrom Lidar Operation Log

Log Sheet 1 of 1
Operators : E.Gudmundsson, J.Jørgensen, E.Guðmundsson
Date(s) : 000929 - 000929
File(s) : L9290 - L9292

Files	Time [UT]	Comments	Cnt	S	Ope
L9290	10:37:06	Start of experiment	4947	0	JJ
L9290	10:48:06	System paused to change setup		0	JJ
L9290	10:49:56	Running again, sodium running but with low power ~ 35 mJ		0	JJ
L9291	11:46:53	incremented	6654	1	EG
L9291	12:27:20	Interferance visible on the Rayleigh channel, probably		1	EG
		comming from the new chopper delay unit.
L9291	12:28:19			1	EG
L9291	13:20:53	Heavy clouds moving in and out of the beam	10808	1	JJ
L9291	16:29:28	I can see a slope in the background!! turning Q-sw off		1	EG
		to test
L9291	16:35:54	Still sloping background! Turning laser off		1	EG
L9291	17:12:44	Incremented	7655	1	EG
L9291	17:12:55	data taking end. Looking into background problem	7554	1	EG
L9292	19:12:41	End of experiment	5675	1	EG