Description

Page : 1005

Sondrestrom Lidar Operation Log

Operator(s) : E.Guðmundsson, Brian, Yanity, Brian, Yanity, J.Jørgensen
Purpose : Routine data collection
Date(s) : 020618 - 020620
File(s) : L20020618_000 - L20020620_006
Comments : Nice and clear at startup.

*NOTE marker on logsheets EG June 26 2002.
Filenames fixed after run was complete and filenames are now in correct sequence
and no filnumbers are missing as indicated by the logsheets. Filenumber references
on logsheets were updated so that logsheets correspond to the corrected filenames.

Logfile : L0206180.log

Setup:0

Page : 1006
[Variables]
Rayleigh Power=490mJ

[0]
Iris=0.6mm
Rayleigh System=On
Dye System=Off
Etalon=Out
Daystar=In
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0

Page : 1007

Sondrestrom Lidar Operation Log

Log Sheet 1 of 2
Operators : E.Guðmundsson, Brian Yanity
Date(s) : 020618 - 020619
File(s) : L20020618_000 - L20020619_009

Files	Time [UT]	Comments	Cnt	S	Ope
L20020618_000	12:07:47	Start of experiment		0	EG
		Clear skies	291
	12:17:17	Detected an NLC		0	EG
	13:26:41	NLC fading but still there	564	0	JeJ
	14:06:53	NLC gone	564	0	JeJ
	18:53:30
L20020618_002	18:54:21	Back to normal after some data aq. problems earlier		0	BY
L20020618_003	21:07:11	Scattered light cirrus clouds		0	BY
	00:51:14	counts	266	0	EG
	01:16:18	thin NLC detected at 82km on the 10min int. profile	277	0	EG
L20020619_000	02:44:43	NLC has gotten stronger and the Rayleigh eq. backscatter	279	0	EG
		is ~53km!
	03:07:37	It appears as if the NLC has split and a weaker one is at 84km	272	0	EG
	03:39:46	Layer has grown in thickness and is now ~4km. Req ~55km	257	0	EG
L20020619_001	05:06:31	NLC gone.	266	0	EG
L20020619_003	09:29:07	Stopping data aq for a while	276	0	EG
L20020619_004	10:11:17	incremented filenumber and resumed data collection		0	EG
	10:13:24	Counts	291	0	EG
	10:32:30	!UPS. thermal shutdown on laser starting again		0	EG
L20020619_008	18:57:13	PC crashed breifly, lost 5 min of data, now back online *NOTE		0	BY
	19:48:32	After the crash, it restarted with filename _000. So there will		0	BY
		be a time jump on file L20020619_000. *NOTE
L20020619_009	19:53:41	Filename _000 incremented to _006, accidentally skipping		0	BY
		_005. filename L20020619_005 does not exist. *NOTE

Logsheet:1

Page : 1008

Sondrestrom Lidar Operation Log

Log Sheet 2 of 2
Operators : E.Guðmundsson, Brian, Yanity, J.Jørgensen
Date(s) : 020619 - 020620
File(s) : L20020619_009 - L20020620_006

Files	Time [UT]	Comments	Cnt	S	Ope
L20020619_009	23:03:49	Scattered clouds overhead	446	0	BY
	23:10:08	Low clouds getting thicker	836	0	BY
	23:49:17	A small hole in the clouds, but more are on the way	99	0	BY
20020620_000	01:16:36	More low clouds	122	0	BY
	02:52:12	NLC?		0	EG
	03:19:27	YES! And getting stronger		0	EG
	04:11:46	Decended rather quicly and has dissapeared		0	EG
	10:24:26	Some slight cirrus above, still getting good signal though.		0	EG
L20020620_004	12:03:44	Thin clouds overhead		0	JJ
L20020620_005	15:18:10	Clouds		0	JJ
	15:33:54	Almost overcast now. Will hang in there a while longer to		0	JJ
		see if conditions improve
L20020620_006	16:54:49	Completely overcast now going to shut down.....		0	JJ
L20020620_006	16:55:27	End of experiment		0	JJ