Description


Page : 882

Sondrestrom Lidar Operation Log


Operator(s) : E.Guðmundsson, J.Thayer
Purpose : NLC Observations
Date(s) : 010803 - 010804
File(s) : L108032 - L108040
Comments : NLC detected
Logfile : l0108030.log

Setup:0


Page : 883
[Variables]
Rayleigh Power=520 mJ

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

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

Logsheet:0


Page : 884

Sondrestrom Lidar Operation Log


Log Sheet 1 of 2
Operators : E.Guðmundsson, J.Thayer
Date(s) : 010803 - 010804
File(s) : L108032 - L108032
FilesTime [UT]CommentsCntSOpe
L10803219:30:23Start of experiment29150JT
L10803219:53:00There may be an incling of an NLC on the 10 min ubt28150EG
L10803220:41:07NLC weak but still there25870JT
L10803221:16:45Still weak NLC detected equiv Rayliegh = 0EG
L10803221:44:33NLC is gone and was intermittent throughout27500JT
L10803222:27:22NLC is back but weak and intermittent27670JT
L10803223:01:49NLC is still there and getting a little stronger sza=82.728090JT
L10803223:22:56NLC getting stronger28270JT
L10803200:17:55NLC went away with a dramatc drop in altitude sza = 88.729210JT
L10803200:55:15The NLC returns very strong, eq Ray = 65 km27270JT
L10803201:12:55NLC still present. I will not change setup to polarizer only28070JT
L10803201:27:19NLC Rayleigh Equiv = 60 km27020JT
L10803201:57:06NLC has weakened considerably seems very thin26170JT
L10803202:28:22NLC still around Rayleigh Equiv = 70 km24160JT
L10803203:17:03NLCs visible in the NE about 30 degrees elevation angl sza=95.324150JT
L10803203:18:03NLC still detected on lidar23220EG
L10803203:34:16NLC has dropped in altitude and weakening near 81 km now23590JT
L10803203:51:40NLC is recovering and now increasing altitude23960JT
L10803204:05:43Very nice NLC display outside sza=95.5 - no camera ; - (23780JT
L10803204:45:41NLC has increased in strength Equiv Ray = 55 km23700JT
L10803205:35:22NLC still going strong equiv Ray = 60 km. Great Event!24690JT
L10803206:13:57NLC continues26880JT
L10803207:15:02The NLC show continues sza = 86.326410JT
L10803207:51:37NLC has split into two layers sza = 83.326460JT

Logsheet:1


Page : 885

Sondrestrom Lidar Operation Log


Log Sheet 2 of 2
Operators : E.Guðmundsson
Date(s) : 010804 - 010804
File(s) : L108032 - L108040
FilesTime [UT]CommentsCntSOpe
L10803208:13:36Filenumber Incremented24850EG
L10804009:50:22NLC no longer visible25070EG
L10804012:50:10Cirrus clouds abovo nocking teh signal down and increasing25070EG
noise. Signal still usable thouhg.
L10804014:40:39Thick clouds moving in from the East.19620EG
L10804015:19:47Signal totally gone, shutting down29520EG
L10804015:20:27End of experiment29520EG