Description


Page : 1819

Sondrestrom Lidar Operation Log


Operator(s) : Christian Have Pedersen
Purpose : Data acquisition after adjustment made on choppers.
Date(s) : 070424 - 070424
File(s) : L20070417_000 - L20070424_001
Comments : The combined 589/607 profile was found.
IR profile needs to be pushed further up in alt.
Strong low alt. return.
Logfile : I2404070.log

Setup:0


Page : 1820
[0]
front end Iris=not_installed
Rayleigh System=On
Rayleigh Field stop=0.5mm
Rayleigh path attenuation=0dB
Dye System=On
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 : 1821

Sondrestrom Lidar Operation Log


Log Sheet 1 of 1
Operators : Christian Have Pedersen
Date(s) : 070424 - 070424
File(s) : L20070417_000 - L20070424_001
FilesTime [UT]CommentsCntSOpe
L20070417_00001:47:02Start of experiment-790cp
L20070424_00001:48:45Rayleigh attn. Sodium attn. 20dB0cp
L20070424_00002:14:31Removing attn. and adjusting choppers on both Ray. and Na.5190cp
Iris and cabinet open for now.
L20070424_00002:24:44Adjusted 589.149 wavelength to 589.1604980cp
L20070424_00002:38:54Difficult to retrieve a decent sodium layer profile5140cp
L20070424_00002:40:46Replacing 607/589 filter stack with original 589 filter stack0cp
L20070424_00002:48:54No apparent difference. Swapping filters back again.5100cp
L20070424_00002:52:09Just swapped filters and there might be a tiny attn. of the 4930cp
sodium layer using the 607/589 filter stack, but it is hard
to know for sure, when the sodium layer is weak
L20070424_00003:01:51Starting up IR channel.5260cp
L20070424_00003:30:38IR profile converged, however resulting profile is not as expected0cp
L20070424_00003:31:31All 3 channels converged. Now adjusting irises.0cp
L20070424_00003:59:08Sodium profile very sensitive to adjustements to irises.6420cp
so to preserve sodium layer in profile, a high low alt. count
is present.
L20070424_00104:46:29End of experiment6140cp