Description


Page : 1931

Sondrestrom Lidar Operation Log


Operator(s) : Christian, Have, Pedersen, Christian Have Pedersen
Purpose : Daq. on 532nm channel with flipped chopper.
Date(s) : 080412 - 080412
File(s) : L20080412_000 - L20080412_002
Comments : Was not succesful eliminating low alt. hump using flipped chopper. Procedure may
be to find profile with chopper in original position and then flip it.
But still, it should be possible to find profile without doing this.
Logfile : l0804110.log

Setup:0


Page : 1932
[Variables]
Rayleigh Power=

[0]
front end Iris=1.5mm
Rayleigh System=On
Rayleigh Field stop=0.5mm
Rayleigh path attenuation=0dB
Dye System=Off
Sodium Field stop=0.5mm
Etalon=Out
Daystar=4A_In
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0


Page : 1933

Sondrestrom Lidar Operation Log


Log Sheet 1 of 2
Operators : Christian Have Pedersen
Date(s) : 080412 - 080412
File(s) : L20080412_000 - L20080412_001
FilesTime [UT]CommentsCntSOpe
L20080412_00000:45:21Start of experiment370cp
L20080412_00000:45:25Still a lot of background light outside. Daystar is in.0cp
There are AP (Afterpulsing) and a weird low alt. spike.
Chopper is flipped. will now try and improve signal.8
L20080412_00001:02:48Stopping flipping of HW plates.310cp
L20080412_00001:37:22Strange...Flipping the chopper was succesful a couple of4170cp
exp. ago, but today it is not working. Will try and install
chopper in original position.
L20080412_00002:12:09Now the chopper is in the original position. And I am0cp
getting the familiar profile with the low alt. hump.
Also, it now seems that clouds are invading laser area.
L20080412_00002:15:17It is a haze layer outside.1160cp
L20080412_00002:33:17Started RAMAN channel600cp
L20080412_00003:09:04It is impossible to get a good compromise between low alt.0cp
Hump and a profile reaching 85 km alt.
L20080412_00003:10:46Will take some data now. Later on maybe flipping the chopper0cp
will be tried again. Will activate flipping HW plates.
L20080412_00003:12:08Haze layer still present.1990cp
L20080412_00004:40:301830cp
L20080412_00105:03:132050cp
L20080412_00105:11:152040cp
L20080412_00105:51:021080cp
L20080412_00105:52:22Still relatively good conditions outside.Thick haze present.0cp

Logsheet:1


Page : 1934

Sondrestrom Lidar Operation Log


Log Sheet 2 of 2
Operators : Christian Have Pedersen
Date(s) : 080412 - 080412
File(s) : L20080412_002 - L20080412_002
FilesTime [UT]CommentsCntSOpe
L20080412_00206:12:571570cp
L20080412_00206:51:49Thin layer of clouds. Ending exp now.170cp
L20080412_00206:52:13End of experiment0cp