Description

Page : 309

Sondrestrom Lidar Operation Log

Operator(s) : J.Thayer, and, E.Gudmundsson
Purpose : NLC and sodium experiments with ISR
Date(s) : 990801 - 990802
File(s) : L9908010 - L9908011
Comments : Changed flashlamps yesterday (July 31) on the Spectra-Physics laser for the
Rayleigh lidar. Energy is down to about 480 mJ and will improve with time.
Adjusted chopper opening to higher altitude so that the chopper is fully open at
about 23 km (to further reduce any signal induced noise), the electronic gate
continues to gate at 27 km
Logfile : L9908010.log

Setup:0

Page : 310
[Variables]
Dye Power=85 mJ
Rayleigh Power=480 mJ

[0]
90% PMT Iris=not_installed
Rayleigh System=On
Dye System=Off
Daystar=In
Polerizer=In
HalfWave Plates=Tracking
Filter Wheel=3:Open

[1]
90% PMT Iris=not_installed
Rayleigh System=On
Dye System=On
Daystar=In
Polerizer=In
HalfWave Plates=Tracking
Filter Wheel=3:Open

[2]
90% PMT Iris=not_installed
Rayleigh System=On
Dye System=On
Daystar=Out
Polerizer=In
HalfWave Plates=Tracking
Filter Wheel=2:532(.5nm)

Logsheet:0

Page : 311

Sondrestrom Lidar Operation Log

Log Sheet 1 of 1
Operators : J.Thayer, E.Gudmundsson
Date(s) : 990801 - 990802
File(s) : L9908010 - L9908011

Files	Time [UT]	Comments	Cnt	S	Ope
L9908010	23:41:33	Partly cloudy conditions, sza=85.3 Start of experiment	614	0	EG
L9908010	23:48:57	Sodium system and radar are now online in support of Watkin	650	1	EG
L9908010	00:16:35	some clouds in and out of beam sodium at .158, sza=88	611	1	EG
L9908010	01:05:42	Daystar out, sza=91.0 still cirrus clouds in beam	2670	2	EG
L9908010	01:26:14	thin clouds in beam, sza=92	2115	2	EG
L9908010	01:52:01	Cloud situation getting worse	447	2	EG
L9908011	02:35:44	Clouds gone, at least for the moment	2932	2	EG
L9908011	02:50:31	I just saw a funny looking Rayleigh record. Using noise sub	395	2	EG
		traction the record showed a considerable noise floor on the
		display. It was like the noise data was not correct for the
		record.
L9908011	02:53:37	clouds are starting to intefere again	173	2	EG
L9908011	04:28:56	clouds are here to stay-shutting down both lidar systems	50	2	EG
L9908011	04:30:47	End of experiment	33	2	EG