Description


Page : 743

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson
Purpose : Test of dye laser HWP and routine data collection
Date(s) : 010117 - 010118
File(s) : L101170 - L101170
Comments : In spite of clear skies operator was forced to end the experiment as the wind was
blowing snow from the roof onto the telescope and laser chmney windows.
Logfile : l0101170.log

Setup:0


Page : 744
[Variables]
Dye Power=70mJ
Rayleigh Power=530mJ

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

Logsheet:0


Page : 745

Sondrestrom Lidar Operation Log


Log Sheet 1 of 1
Operators : E.Guðmundsson
Date(s) : 010117 - 010118
File(s) : L101170 - L101170
FilesTime [UT]CommentsCntSOpe
L10117022:47:54Start of experiment00EG
L10117022:54:45Some info on the starting setup:00EG
The dye laser HWP is at 145deg giving a lot of Rayl. attenuation
The chopper altitude on the sodium channel is arround 14km
as seen from the raw counts (the straight profile starts to curve
at ~13km) The sodium channel delay is 3965usec
L10117022:58:55Tuning for max sodium67210EG
L10117023:13:44Tuning optimized, max return at 589.156nm to 589.157nm0EG
as indicated by wavemeter.
L10117023:30:49I will now start moving the dye HWP beond 145deg where 0EG
I left off yesterday. This is to find the position that gives
maximum attenuation of the Reyleigh section of the profile
ratio now 2.32
L10117023:33:48Dye HWP set to 150deg. 0EG
L10117023:36:02ratio changed to 2.650EG
L10117023:37:39Dye TX HWP set to 155deg0EG
L10117023:39:51Ratio down to 2.140EG
L10117023:49:18Dye HWP to 1500EG
L10117023:53:32sodium ration now 2.640EG
L10117000:11:53Looks like the max Rayleigh attenuation is at HWP pos 1500EG
deg, or there about
L10117000:51:18Wind has blown snow from the roof onto the telescope 0EG
and laser windows, pausing to clear thw snow.
L10117000:52:48End of experiment0EG