Description

Page : 1470

Sondrestrom Lidar Operation Log

Operator(s) : E.Guðmundsson
Purpose : Running IR lidar and 532nm lidar at the same time
Date(s) : 040612 - 040612
File(s) : L20040612_000 - L20040612_001
Comments : Ok skies with thin laces of cirrus all around.

Logfile : l0406120.log

Setup:0

Page : 1471
[Variables]
Rayleigh Power=

[0]
front end Iris=not_installed
Rayleigh System=On
Rayleigh Field stop=0.5mm
Rayleigh path attenuation=0dB
Dye System=On
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 : 1472

Sondrestrom Lidar Operation Log

Log Sheet 1 of 2
Operators : E.Guðmundsson
Date(s) : 040612 - 040612
File(s) : L20040612_000 - L20040612_000

Files	Time [UT]	Comments	Cnt	S	Ope
L20040612_000	02:01:56	Start of experiment	0	0
L20040612_000	02:07:50	Running IR at 600V with discriminator at -50mV	0	0	EG
L20040612_000	02:10:02	will run like this for 30min	0	0	EG
L20040612_000	02:10:31	Outside temperature at 8deg.	0	0	EG
		Note operating conditions on IR. Daystar in the path	0
		Apperture fully open.
L20040612_000	02:15:33	Paused the data acq on IR, bringing the HV to 650V and	0	0	EG
		settign discriminator to -85mV
L20040612_000	02:17:20	Running again		0	EG
L20040612_000	02:20:34	SR430 can not follow on this setting due to signal,		0	EG
		setting HV back to 600V
L20040612_000	02:22:24	Running again with 600V		0	EG
L20040612_000	02:25:14	trying to converge a bit to reduce the signal, can this be		0	EG
		real?
L20040612_000	02:29:48	just turned the discriminator to -88mV		0	EG
L20040612_000	02:34:45	looks like the SR430 is defened at this setting	0	0	EG
		turning bak to -50mV discriminator
L20040612_000	02:37:00	Stopping the iris down		0	EG
L20040612_000	02:46:27	laser noise causing problmes, corrected trigger source		0	EG
L20040612_000	03:20:18	Collecting data again on the IR channel with		0	EG
L20040612_000	03:21:15	Daystar temperature stepped up to two, counts at 10km=22		0	EG
L20040612_000	03:25:29	turning daystar off, IR counts are referenced at 10km;		0	EG
L20040612_000	03:27:09	IR counts 14		0	EG
L20040612_000	03:27:56	IR counts 21		0	EG

Logsheet:1

Page : 1473

Sondrestrom Lidar Operation Log

Log Sheet 2 of 2
Operators : E.Guðmundsson
Date(s) : 040612 - 040612
File(s) : L20040612_000 - L20040612_001

Files	Time [UT]	Comments	S	Ope
L20040612_000	03:28:17	IR counts 25	0	EG
L20040612_000	03:30:02	IR counts 29	0	EG
L20040612_000	03:46:37	Removing daystar	0	EG
L20040612_000	03:59:25	Running now with 1nm filter, had to stop it severely down	0	EG
		due to high count rate. seeing signal passed 20km
L20040612_000	04:03:41	opening the iris a tad as Im still within bounds on counts	0	EG
L20040612_000	04:05:13	Running with the iris a tad more open, background	0	EG
		counts at 50 signal counts at 10km 243
L20040612_000	04:06:16	taking data at this setting for 30min	0	EG
L20040612_000	04:10:29	Still some cirrus at 8km interfering	0	EG
L20040612_001	04:39:03	testing if converging improves on the IR signal	0	EG
L20040612_001	04:51:26	Lost the skies while tweeking - ending this session	0	EG
L20040612_001	04:51:52	End of experiment	0	EG