Description


Page : 1415

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson, Nathan, Rausch, Nathan Rausch
Purpose : Testing and data collection
Date(s) : 040330 - 040330
File(s) : L20040330_000 - L20040330_004
Comments : Testing for extinction propperties across halfwaveplate rotation. Plates locked in
extinct mode and moved in sync.
Logfile : l0403300.log

Setup:0


Page : 1416
[Variables]
Rayleigh Power=430mJ

[0]
front end Iris=3.0mm
Rayleigh System=On
Rayleigh Field stop=2.0mm
Rayleigh path attenuation=0dB
Dye System=Off
Sodium Field stop=2.0mm
Etalon=Out
Daystar=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=off

Logsheet:0


Page : 1417

Sondrestrom Lidar Operation Log


Log Sheet 1 of 3
Operators : E.Guðmundsson
Date(s) : 040330 - 040330
File(s) : L20040330_000 - L20040330_001
FilesTime [UT]CommentsCntSOpe
L20040330_00001:04:46Start of experiment2160EG
Seeking maximum counts by adjusting TX plate offset408
in order to start the test - plate in new postion and propper
plate offset needs to be found.
L20040330_00001:06:39TX plate offset chnaged from 67deg to 62deg (10 deg pol rot)4320EG
L20040330_00001:24:02Got things aligned - taking some reference data8190EG
L20040330_00001:54:47Placing tx plate in the extinct mode 5+45=50 by placing the 8250EG
TX offset at 50 deg, lovering chopper altitude at the same
time to make tweeking easier
L20040330_00002:03:40Running in the extinct mode now320EG
L20040330_00002:14:39290EG
L20040330_00002:15:11moving plates in sync by +5deg (10deg rotation)0EG
L20040330_00002:16:43Plates now at RX 52deg TX 55deg1140EG
OOPS! TX plate direction needs to change exiting program118
to reverse the TX plate flag
L20040330_00102:30:59Back to the startign point with plates as orthagonal as possible270EG
L20040330_00102:31:36Advancing plates in sync by 5 deg => RX=52 and TX=45270EG
L20040330_00102:35:46With the plates like this the extinction ratio has worsened1070EG
L20040330_00102:37:10Before continuing I have to make sure that this is not1080EG
due to bad movement of the plates
L20040330_00102:37:13Going to the TX room to tweek the TX plate manually1120EG
to see if it's possible to push the extinction further down
L20040330_00102:42:46After tweeking I found the plate to be allready at minimum1000EG
The motors are tracking as they should.

Logsheet:1


Page : 1418

Sondrestrom Lidar Operation Log


Log Sheet 2 of 3
Operators : E.Guðmundsson, Nathan Rausch
Date(s) : 040330 - 040330
File(s) : L20040330_001 - L20040330_004
FilesTime [UT]CommentsCntSOpe
L20040330_00102:47:26Moving plates further by +5deg940EG
TX plate now at 40deg and RX plate at 57deg90
L20040330_00102:49:35extinction ratio keeps worsening -2050EG
I can see clouds comming in - I need to know if I can
compensate by tilting the plate - if that is the case then
the source is still at the transmitter side.
L20040330_00102:50:46I don't have the control needed to do this safely with1980EG
full energy. continuing test
L20040330_00103:02:21Added further 5deg, total travel now 15deg0EG
TX plate now at 35deg and RX at 62deg
L20040330_00103:03:40Ratio just keeps getting worse3340EG
L20040330_00103:08:43adding further 5 deg 3160EG
TX plate now at 30deg and RX plate at 67deg340
L20040330_00103:13:43Adding 5 deg, TX plate at 25deg and RX plate at 72deg3820EG
L20040330_00103:17:43Adding 5 deg Tx plate at 20deg and RX plate at 77deg3440EG
L20040330_00103:36:43Interuped by radar problems2840EG
L20040330_00204:57:17Done working on Radar with Claus - problem found and 0EG
a temporary measure put in place. Getting pooped
Nathan Taking over in normal data acq mode
L20040330_00204:58:22Changing TX offset to 50EG
L20040330_00205:06:01Things back to normal ops , incrementing8270EG
L20040330_00305:33:32Shut down sodium system3740NR
L20040330_00306:33:23Haze layer4020NR
L20040330_00407:53:08counts4820NR

Logsheet:2


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Sondrestrom Lidar Operation Log


Log Sheet 3 of 3
Operators : Nathan Rausch
Date(s) : 040330 - 040330
File(s) : L20040330_004 - L20040330_004
FilesTime [UT]CommentsCntSOpe
L20040330_00408:09:23End of experiment320NR