Description


Page : 530

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson
Purpose : Routine data collection
Date(s) : 000515 - 000515
File(s) : L5150 - L5153
Comments : Confirming the operation of the reciever. Clouds around but lot's of holes around,

may be able to get useful data. As the radar is not running it will be interesting to
see the stability of the system on both channels as I'm running with the minimum
iris. As it turned out after the run was complete, things were remarkably stable!
Logfile : l0005140.log

Setup:0


Page : 531
[Variables]
Dye Power=105mj
Rayleigh Power=550mJ

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

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

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

Logsheet:0


Page : 532

Sondrestrom Lidar Operation Log


Log Sheet 1 of 2
Operators : E.Guðmundsson
Date(s) : 000515 - 000515
File(s) : L5150 - L5151
FilesTime [UT]CommentsCntSOpe
L515000:57:54Start of experiment3320EG
L515001:05:03Rayleigh still not in the air, working on it3320EG
L515101:16:49Incremented40271EG
L515101:26:13Both systems running now75051EG
L515101:30:03Sodium Convergence mirror adjusted77351EG
L515101:36:37Rayleigh Convergence mirror adjusted70311EG
L515101:48:43!!!! There may be something at about 85km seen on 101EG
integrated rayleigh profiles (4 bin sub int), or is it just noise?
L515101:49:50NLC or noise, probably noise?????1EG
L515101:51:04SZA=92.51EG
L515102:04:48Rayleigh Convergence mirror adjusted58501EG
L515102:08:30Counts86841EG
L515103:04:25dye wavelength has drifted to 589.160nm Tuned to 589.15875481EG
L515103:10:13Sodium Convergence mirror adjusted74161EG
L515103:17:42!!! A very thin sporadic sodium layer at ~97km74231EG
L515103:19:20I'm sure there is something around 86km on the rayleih side74971EG
L515103:21:10Sporadic sodium rayleigh eq, ~30km, sodium layer rayl eq75621EG
is around 37km7496
L515103:58:55!! Sporadic Sodium on topside of normal layer ~95km67841EG
L515104:32:30Sporadic layer extreamly thin now, and at ~93km1EG
Rayleigh eq backscatter is ~30km
L515104:49:26Checked wavemeter, dye wavelength stable at 589.158nm67131EG
L515104:50:29sporadic counts 5 to 10 times as normal sodium when at max69901EG
L515104:52:37Temperature in dye laser room has been stable 69341EG

Logsheet:1


Page : 533

Sondrestrom Lidar Operation Log


Log Sheet 2 of 2
Operators : E.Guðmundsson
Date(s) : 000515 - 000515
File(s) : L5151 - L5153
FilesTime [UT]CommentsCntSOpe
L515104:53:35The sharp peek of the sporadic is gone now, resisting the68631EG
temptation of converging the sodium system.
L515104:55:01SZA=92.371791EG
L515104:55:23Counts72381EG
L515104:56:14Rayleigh S/N=(6786-138)/13869091EG
L515104:58:4410 integrated profiles of rayleigh (192m Bin W) yeilds 68571EG
signal upto 75km using background subtraction
L515205:27:14Incremented1EG
L515205:51:09Adjusting HWP1EG
L515205:55:35rotated TX HWP+ 45deg (90 pol rot)13061EG
L515206:18:50rotated the TX HWP -45 deg 1EG
L515206:20:48SZA=87.8 S/N= (9660-1218)/121897251EG
L515206:22:07Sodium visible1EG
L515206:26:59Pausing to change to the daystar1EG
L515206:31:42Incremented2EG
L515306:32:41UPS! forgot to crank up the HV again99262EG
L515306:34:10SZA=86.9 S/N (897-49)/498832EG
Note for this setup the broadband 532nm filter is in the path!
L515306:38:25Rayleigh Convergence mirror adjusted8552EG
L515307:11:11Nothing happening so I'll close down9252EG
L515307:11:54End of experiment9252EG