Description


Page : 1867

Sondrestrom Lidar Operation Log


Operator(s) : Christian Have Pedersen
Purpose : Optimizing 532nm channel
Date(s) : 071113 - 071114
File(s) :
Comments : Was only able to reach ~60 km alt. on 532nm channel.
Ideas:
-Checking frontend tube alignment with secondary and primary
-Replacing TX HW plate, HG windows etc. (Power is above 500 mJ, which should
be enough, but the components are clearly worn)
Logfile : L0711140.log

Setup:0


Page : 1868
[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 : 1869

Sondrestrom Lidar Operation Log


Log Sheet 1 of 1
Operators : Christian Have Pedersen
Date(s) : 071113 - 071114
File(s) :
FilesTime [UT]CommentsCntSOpe
20071112_00020:58:27Start of experiment00cp
20071113_00021:35:09Tried to find good rayleigh profile with meniscus lens in00cp
frontend, but profile is only good up till 60 km0
20071113_00021:36:06By the way, it is a clear sky and excellent conditions00cp
for an experiment0
20071113_00021:37:04Swaping frontend. Now the original lens.0cp
20071113_00021:42:23A bit more signal is the result of replacing the frontend0cp
and doing no other adjustments.
20071113_00022:44:56Tweak, tweak, tweak. Iteration between converging the laser0cp
adjusting the 2nd. iris and the frontend tube mount.
20071113_00022:46:19Will now try and adjust the RX HW plate.0cp
20071113_00023:15:48HW plates adj. did not change anything. 0cp
20071113_00123:54:02Taking down laser. Need to check frontend alignment with0cp
secondary and primary mirror of the telescope.
20071113_00101:15:45Not convinced that the frontend tube is aligned with the 0cp
secondary and primary.
20071113_00101:16:53Will have to verify this alignment during daytime0cp
20071113_00101:20:36End of experiment0cp