Description


Page : 0

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson
Purpose : routine data collection togeather with the IS Radar for a AIM satellite pass.
Date(s) : 070810 - 070810
File(s) : L20070810_000 - L20070810_002
Comments : Good observing condition, very clear skies

Observed an NLC for 5hours.
Logfile : L0708090.log

Setup:0


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[Variables]
Rayleigh Power=

[0]
front end Iris=3.0mm
Rayleigh System=On
Rayleigh Field stop=2.0mm
Rayleigh path attenuation=0dB
Dye System=Off
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 : 2

Sondrestrom Lidar Operation Log


Log Sheet 1 of 2
Operators : E.Guðmundsson
Date(s) : 070810 - 070810
File(s) : L20070810_000 - L20070810_001
FilesTime [UT]CommentsCntSOpe
L20070810_00000:45:48Start of experiment0EG
L20070810_00001:28:13system has been running taking good data since start4270EG
L20070810_00001:50:56Observing an NLC! at 82km REA ~73km. thicknes about0EG
1km!
L20070810_00001:54:19Checking time on lidar PC time is 4seconds advanced on4250EG
LIDAR PC compared to timeserver.
L20070810_00001:55:50Observing a strong thin layer on Radar at the same time4250EG
the NLC occured
L20070810_00002:03:24layer fading on radar and lidar0EG
L20070810_00002:06:26layer picking up again on lidar only4020EG
L20070810_00002:10:11layer seems to be decending a bit, no change in thickness3950EG
L20070810_00002:13:50decending sharply, increased intensity REA~65km3990EG
L20070810_00002:22:35layer accending again.3980EG
L20070810_00002:31:06layer bifurcating3810EG
L20070810_00002:57:44REA~60km now strongest returns so far. one layer now3900EG
L20070810_00003:05:15Looked outside and there is a very nice display all over 3850EG
NLC;s peppering the sky, have not seen them like this
before, one can see them at a very steep look angle
L20070810_00003:07:31My gess is upt 60-70deg above the horizon towards north4020EG
L20070810_00103:33:16peek density dropping but layer thicknes increasing a lot0EG
L20070810_00103:49:30Layer faded into nothing while I was outside takign pictures4010EG
L20070810_00103:50:03NLC's still out there but visually much fainter than an hour ago4010EG
L20070810_00104:02:15LAyer is back. 4090EG
L20070810_00105:22:53Still seeing a good NLC4330EG

Logsheet:1


Page : 3

Sondrestrom Lidar Operation Log


Log Sheet 2 of 2
Operators : E.Guðmundsson
Date(s) : 070810 - 070810
File(s) : L20070810_002 - L20070810_002
FilesTime [UT]CommentsCntSOpe
L20070810_00205:58:27Still seeing a good NLC a bit thicker now at 83km0EG
L20070810_00207:08:36clouds coming in, there is still an observable NLC but0EG
must shut down.
L20070810_00207:09:13End of experiment0EG