Description


Page : 1488

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson
Purpose : Data collection on IR and 532nm
Date(s) : 040622 - 040623
File(s) : L20040622_001 - L20040623_001
Comments : Week NLC detected
Logfile : l0406220.log

Setup:0


Page : 1489
[Variables]
Rayleigh Power=400mJ

[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 : 1490

Sondrestrom Lidar Operation Log


Log Sheet 1 of 2
Operators : E.Guðmundsson
Date(s) : 040622 - 040622
File(s) : L20040622_001 - L20040622_002
FilesTime [UT]CommentsCntSOpe
L20040622_00116:55:29Start of experiment0EG
L20040622_00116:57:3218IR counts at 10km, getting a profile upto 15km0EG
L20040622_00118:04:08installed baffle on telescope top to protecte the spider 0EG
L20040622_00118:04:50from the direct sun0EG
L20040622_00118:27:55noise levels low, opening up the apperture.0EG
L20040622_00118:34:38converged IR, things looking a bit better IR counts 10km=151040EG
L20040622_00118:53:18modified convergence a bit, 0EG
L20040622_00119:06:28trying to converge the IR again, 0EG
L20040622_00219:30:43noise levels low on the IR, increasing the HV to 600V0EG
L20040622_00219:37:31trying to converge the IR again, counts at 10km~481020EG
L20040622_00219:44:25not any big effect, the baffle installed earlier does not seam0EG
to have the great effect that was hoped for!
L20040622_00220:50:52trying to converge teh IR again.0EG
L20040622_00221:15:11Still working on the convergence - there is a layer at 13km?0EG
L20040622_00221:31:31Sun stopped shining on the telescope enclosure a moment ago0EG
adjusting convegence is getting me some results now!
Counts at 10km =101
L20040622_00221:38:19Hands off the system for a while, have to see if counts creep1050EG
up on there own.
L20040622_00221:41:18IR counts at 10km~161960EG
L20040622_00221:43:33IR counts at 10km ~220960EG
L20040622_00221:47:12IR counts at 10km~2801150EG
L20040622_00221:51:49IR countsat 10km~3831060EG
L20040622_00221:53:48IR counts at 10km~4141060EG

Logsheet:1


Page : 1491

Sondrestrom Lidar Operation Log


Log Sheet 2 of 2
Operators : E.Guðmundsson
Date(s) : 040622 - 040623
File(s) : L20040622_003 - L20040623_001
FilesTime [UT]CommentsCntSOpe
L20040622_00321:57:27IR counts at 10km~484990EG
L20040622_00322:10:55IR counts at 10km ~8531110EG
L20040622_00322:19:23IR counts at 10km ~10741100EG
L20040622_00322:23:41Ir counts at 10km~12851080EG
L20040622_00322:24:00IR counts seem to creep up without my intervention.1090EG
L20040622_00322:34:01Noise level on the rise, lowering HV1090EG
L20040622_00322:35:58Reduced HV to 580V, lowered disc threshold -61mV970EG
L20040622_00322:57:22Lost the simmer on the GCR5 for some reason -restarted1000EG
laser and it came back. Need to change flashlamps
L20040622_00300:06:09IR converged920EG
L20040623_00000:38:15noise getting to high, reducing apperture0EG
L20040623_00000:46:56I may be seeigna week NLC at 83km only visible using 0EG
60min integrations
L20040623_00001:11:14192m bins 60min integration 62km Rayleigh eq. NLC0EG
L20040623_00002:41:58IR profile looks a bit funny after 35-40km?910EG
L20040623_00103:51:14End of experiment970EG