Description

Page : 1876

Sondrestrom Lidar Operation Log

Operator(s) : Christian, Have, Pedersen, Christian Have Pedersen
Purpose : Data acq. on 532nm. Data acq. on 607nm (Verification)
Date(s) : 071128 - 071129
File(s) : L20071129_002 - L20071129_005
Comments : Nice profile on 532nm channel. Need to verify quality of profile on 607nm
channel, but it looks reasonable.
Unexpected powerful interference from RADAR installation, when running
RADAR exp.
The RADAR exp. was started within the last hour of LIDAR data acq., hence the
last hour of LIDAR data is garbage !!
Logfile : L0711290.log

Setup:0

Page : 1877
[Variables]
Chopper delay=38
Rayleigh Power=490 mJ

[0]
front end Iris=1.5mm
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=Out
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0

Page : 1878

Sondrestrom Lidar Operation Log

Log Sheet 1 of 2
Operators : Christian Have Pedersen
Date(s) : 071128 - 071129
File(s) : L20071129_002 - L20071129_004

Files	Time [UT]	Comments	Cnt	S	Ope
20071128_001	21:30:16	Start of experiment		0	cp
20071128_001	22:01:58	Dark counts on the 532nm channel:		0	cp
		Total:57 meam: 0.056 std:0.233
		SR430 setup:
		Binwidth: 10.4 ms, Bins pr.rec.: 1024
20071128_000	22:06:54	Counts still low	320	0	cp
20071128_000	22:59:11	Have been tweaking the 1st. hour to get higher counts.	426	0	cp
	22:59:12	Will now stop tweaking and keep an eye on the cnts.	424	0	cp
	23:05:33		388	0	cp
	23:19:57		395	0	cp
	00:11:13		378	0	cp
20071129_000	00:51:04	Restarting app. And will do data acq. on 607 channel as well		0	cp
		The "589nm" PMT will be dedicated for 607nm daq.
L20071129_002	01:01:11	Up and running again.		0	cp
	01:16:29		481	0	cp
	01:28:02	Problems with ARCLITE app. Restarting app.		0	cp
L20071129_003	01:43:07	Haze layer	302	0	cp
L20071129_003	02:05:51	ARCLITE daq. app. is not able to do daq. on both channels		0	cp
		at the same time....apparently. Restarting app. again	463
L20071129_003	02:08:57	Up again.		0	cp
L20071129_004	02:24:04	Gave up on 607nm daq. Need to check out ARCLITE app.		0	cp
		for conflicts. will
L20071129_004	02:47:41	Haze layer		0	cp
L20071129_004	03:03:44		503	0	cp

Logsheet:1

Page : 1879

Sondrestrom Lidar Operation Log

Log Sheet 2 of 2
Operators : Christian Have Pedersen
Date(s) : 071129 - 071129
File(s) : L20071129_004 - L20071129_005

Files	Time [UT]	Comments	Cnt	S	Ope
L20071129_004	03:20:54	ARCLITE app. GPIB com error.	493	0	cp
L20071129_004	04:14:45	Haze layer	417	0	cp
L20071129_005	04:44:06	Funny looking profile. Running radar now, so I am not		0	cp
		100% attentive to the LIDAR.
L20071129_005	04:47:55	Weird stuff is going on. But it might be related to the radar		0	cp
		run. A haze layer is also present. But looking outside the sky
		is otherwise clear => Fairly good conditions still.
		Looking at the convergence scope, it looks like a strong
		noise signal is interfering.
L20071129_005	05:15:28	Will have to verify this behaviour, when I am not also running		0	cp
		the radar.
		Shutting down the radar in half an hour. But I do not want to
		waste LIDAR time, so I am shutting down this exp. now
L20071129_005	05:18:06	End of experiment		0	cp