Description


Page : 552

Sondrestrom Lidar Operation Log


Operator(s) : A.Merkel
Purpose : To look for NLC
Date(s) : 000607 - 000607
File(s) : L6070 - L6071
Comments : I started the data taking in not very good conditions. The sky has a lot of
intermittent clouds. But I thought I might be able to get a good count rate on the
rayleigh channel. But this is not a good data set.

I put the daystar in at around 86 degrees sza. The signal dropped from 9900 to
1400 counts. This is more than 25% decrease in signal. The noise dropped from
3000 to 150. So the signal dropped to 15% of signal and the noise dropped to
5%
of the orignal noise.

The clouds moved in at a sza=79. End of experiment
Logfile : l0006070.log

Setup:0


Page : 553
[Variables]
Dye Power=80 mJ
Rayleigh Power=540 mJ

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

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

Logsheet:0


Page : 554

Sondrestrom Lidar Operation Log


Log Sheet 1 of 1
Operators : A.Merkel
Date(s) : 000607 - 000607
File(s) : L6070 - L6071
FilesTime [UT]CommentsCntSOpe
L607003:21:46Start of experiment48900AM
L607003:22:48Sodium Convergence mirror adjusted91400AM
L607003:22:49Rayleigh Convergence mirror adjusted91400AM
L607003:23:46sza=90.282790AM
L607005:02:04Not a good data set, just mostly looking for NLCs63650AM
L607005:02:24Lots of clouds63650AM
L607005:13:17sza=87.961580AM
L607005:29:40The clouds are going away for a little while95990AM
L607005:32:22noise is about 300099710AM
L607105:36:49put daystart in99541AM
L607105:42:15dark counts are 1509311AM
L607105:47:04sza =86.314381AM
L607106:01:27sza=85.5 snr=814641AM
L607106:03:56no clouds14741AM
L607106:19:23sza=84.4 snr=715691AM
L607106:35:37sza=83.3 snr=616391AM
L607106:49:18sza=82.4 snr=5.517161AM
L607107:12:06sza=80.7 snr=515931AM
L607107:27:42sza=79.5 snr=4.517391AM
L607107:29:36End of experiment17080AM