Description


Page : 807

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson
Purpose : Test and tweek of new LC etaon
Date(s) : 010531 - 010531
File(s) : L105310 - L105317
Comments : Note Laser energy while seeded is 420mJ.
Note. Setup 2 trough 4 is with the Daystar installed.

Daystar performance better than ever before or arround 33% transmissio
comapred to normal dark time setup.
Logfile : l0105310.log

Setup:0


Page : 808
[0]
Iris=min_opening
Rayleigh System=On
Dye System=Off
Etalon=In
Polarizer=In
HalfWave Plates=In
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=on

[1]
Iris=min_opening
Rayleigh System=On
Dye System=Off
Etalon=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=on

[2]
Iris=min_opening
Rayleigh System=On
Dye System=Off
Etalon=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=2:532(.5nm)
Rayleigh seeding=on

[3]
Iris=min_opening
Rayleigh System=On
Dye System=Off

Setup:1


Page : 809
Etalon=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=none
Rayleigh seeding=on

[4]
Iris=min_opening
Rayleigh System=On
Dye System=Off
Etalon=Out
Polarizer=In
HalfWave Plates=Tracking
Rayleigh Filter=none
Rayleigh seeding=off

Logsheet:0


Page : 810

Sondrestrom Lidar Operation Log


Log Sheet 1 of 3
Operators : E.Guðmundsson
Date(s) : 010531 - 010531
File(s) : L105310 - L105313
FilesTime [UT]CommentsCntSOpe
L10531000:54:30Start of experiment4400EG
L10531000:55:34first few records show not to great a performance!4400EG
SZA=86, backgnd=21 counts
L10531001:23:54Incremented4910EG
L10531001:24:02Collecting a few records with the seeding on 4910EG
L10531101:24:42Note: There is not a big effect in the voltage tweeking of0EG
the etalon. I was expecting more. The Etalon voltage is
at 7.210V using AUX 1 output of the SR430. This is the
voltage that yields maximum counts.
L10531101:58:31turnimg the seeding off just to see the impact on the signal4720EG
L10531101:59:27laser seeding has been turned off4800EG
L10531102:17:09I can see no differnece in the performance seeded or unseeded4740EG
I double checked the seeding and the laser is seeding fine!???
L10531102:17:59turning seeding back on.4740EG
L10531102:19:46Laser seeding has been activated and seeding verified5010EG
L10531102:20:18!UPS! I'm not tracking with the halfwave plates. Waiting0EG
a few records before I restart the program with HWP tracking
activated.
L10531102:29:10exiting program to run HWP SZA=90.5 S=432 N=104520EG
L10531102:42:55Running with HWP optimized, using setup1 for the first few120821EG
records (the normal path) SZA= 90.8 S=12000 N=950
L10531202:49:31Paused, Changing back to the Etalon115651EG
L10531302:51:11Running again using setup 0 (LC etalon), Incremented prior4461EG
L10531303:02:24looking fro a new maximum on LC voltage control4191EG

Logsheet:1


Page : 811

Sondrestrom Lidar Operation Log


Log Sheet 2 of 3
Operators : E.Guðmundsson
Date(s) : 010531 - 010531
File(s) : L105313 - L105317
FilesTime [UT]CommentsCntSOpe
L10531303:05:59AUX1 voltage at 7.510V, no improvement found4311EG
L10531303:26:48SZA 91.1 S=422 N=91EG
L10531303:27:25Paused to change to the daystar4071EG
L10531303:34:18Resumed running with daystar setup. Note 532nm filter in2EG
place. Incremented.
L10531403:37:34Counts SZA 91.0 S=2333 N=14 S/N=16623332EG
L10531403:44:39Changing to Setup 3 (removing 532nm filter and closing RX)23042
Paused
L10531503:49:10Resuming with setup 3 (532nm filter removed)34583
L10531503:51:49SZA 90.9 S=3624 N=28 S/N=12936253
Signal to noise seems to have suffered by removing the
Broadband filter alhough singal has increased by a factor of
1.5.
L10531503:55:09Paused to turn laser seeding off, 36253
L10531503:57:24Resuming with Setup 4 (Laser seeding off), incremented41454
L10531603:59:50SZA 90.8 S=4145 N=30 S/N~13839574
L10531605:10:24SZA= 88.8 S=3984 N= 65 S/N~6139674
L10531605:48:52SZA=87.0 S=4100 N=99 S/N~4141894
L10531606:09:53SZA=85.7 S=4117 N=119 S/N~3541174
L10531607:02:54Clouds 17104
L10531607:20:13SZA 80.7 S=4100 N=214 S/N~1944324
L10531608:20:03SZA 75.7 S=4200 N=315 S/N~13.342764
L10531708:59:07Incremented, thin cirrus above38774
L10531709:20:16SZA =70 S=4300 N=507 S/N~942454

Logsheet:2


Page : 812

Sondrestrom Lidar Operation Log


Log Sheet 3 of 3
Operators : E.Guðmundsson
Date(s) : 010531 - 010531
File(s) : L105317 - L105317
FilesTime [UT]CommentsCntSOpe
L10531709:41:11Clouds starting to interfere now. Still seeing good signal though37494EG
L10531710:15:48End of experiment28804EG