Description


Page : 566

Sondrestrom Lidar Operation Log


Operator(s) : A.Merkel
Purpose : Looking for NLC and routine data collection
Date(s) : 000612 - 000612
File(s) : L6120 - L6120
Comments : The skies are very clear. I started late because the Rayleigh transmitting optics
needed to be changed. The first dichroic had a burn mark so it had to be moved
because there was no replacement. This did not seem to change the signal at all.

The sodium signal looks like it is sporadic tonight.

The rayleigh reciever still has the daystar installed. The daystar will probably be
continously used from now on.

No NLC detected

It looks like we lost some signal to noise on this run. By the signal starting at
around 2000, it out us about a half an hour ahead of the data taken on July 8.
when
the sza=74 on July 8 the snr=23.3. Tonight it equals 17.8. On July 8 the sza
equaled 71 at this snr.
Logfile : l0006120.log

Setup:0


Page : 567
[Variables]
Dye Power=115 mJ
Rayleigh Power=530 mJ

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

Logsheet:0


Page : 568

Sondrestrom Lidar Operation Log


Log Sheet 1 of 1
Operators : A.Merkel
Date(s) : 000612 - 000612
File(s) : L6120 - L6120
FilesTime [UT]CommentsCntSOpe
L612002:48:38Start of experiment19050
L612002:50:45sza=89.620220AM
had to start late due to an optics change in the rayleigh system
L612002:52:08Rayleigh Convergence mirror adjusted19550AM
02:56:400AM
L612002:57:41sporadic sodium layer at around 95 km19920AM
L612006:06:03everything is going well, sza=84.9824800AM
L612006:09:31background=52, still detecting up to ~70 km,snr=4824580AM
L612008:25:28sza=74.36, b=129, snr=17.824310AM
L612008:33:41The sodium channel is still slightly visible23450AM
L612009:21:53sza=69 snr=11.3422610AM
L612009:30:52still getting sodium signal21100AM
L612009:34:41End of experiment21170AM