Description


Page : 2133

Sondrestrom Lidar Operation Log


Operator(s) : Christian Have Pedersen
Purpose : Data acq. on 532nm and X-polarized 532nm.
Date(s) : 090211 - 090211
File(s) : L20090127_000 - L20090127_000
Comments : Had to shut down very early, due to dense haze layer
Logfile : l0901270.log

Setup:0


Page : 2134
[Variables]
BigSky2 Power=
BigSky1 Power=
Rayleigh Power=15.5 W

[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=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0


Page : 2135

Sondrestrom Lidar Operation Log


Log Sheet 1 of 1
Operators : Christian Have Pedersen
Date(s) : 090211 - 090211
File(s) : L20090127_000 - L20090127_000
FilesTime [UT]CommentsCntSOpe
L20090127_00003:51:28Start of experiment0cp
L20090127_00004:08:07Trying to improve Rayleigh return20cp
L20090127_00004:22:48That helped1470cp
L20090127_00004:23:37Nothing on the Raman channel0cp
L20090127_00004:25:43Powering up the PMT helped !1430cp
L20090127_00004:31:08Tried to optimize HW pltes and apertures to get an improved profile1620cp
L20090127_00004:37:43Was not satified with profile, so did some adjustment.0cp
L20090127_00004:51:14Difficult to improve. Conditions outside perfect.0cp
L20090127_00005:06:31Lost a lot of signal. Lowering the chopper revealed a spike 0cp
in the profile at low alt. indicating a haze layer.
Difficult to observe outside.
L20090127_00005:07:40But cannot improve signal because of this haze layer.560cp
L20090127_00005:09:22Using binoculars it is possible to see the spot at the end of the0cp
LASER beam outside.
L20090127_00005:10:03Too bad, because something interesting is going on in the profile at0cp
approx. 65 km alt.91
L20090127_00005:35:47Haze layer is getting more dense. Will wait for 10 mins.0cp
L20090127_00005:46:26Looks like I will have to give up daq. tonight.0cp
L20090127_00005:52:57Thats it. Will try again tomorrow.0cp
L20090127_00005:53:38End of experiment0cp