Description

Page : 95

Sondrestrom Lidar Operation Log

Operator(s) : J.Geddes
Purpose : Routine data collection and experiment comparing new 532nm filter and Daystar filter effectiveness.
Date(s) : 980717 - 980718
File(s) : L9807170 - L9807173
Comments : At the very beginning of the run, the Daystar filter was out, but the 532nm filter
was not in place. Therefore, the Rayleigh PMT saturated. The PMT voltage was
turned down, the Daystar filter was replaced, and the PMT began collecting data
once the voltage was turned up again.

During the first cycle of removing the Daystar filter and subsequently replacing it,
the chopper wheel was accidentally turned off. It was turned back on again
immediately. No data was compromised.

During the run, data collection was periodically stopped, the Daystar filter was
replaced with a 532nm filter, and several minutes of data in this configuration
were
obtained. In this way a measure of the relative performance of these components
at diffferent SZAs was found.

The skies were clear throughout the night.
Logfile : l9807170.log

Setup:0

Page : 96
[Variables]
Rayleigh Power=525mJ

[0]
90% PMT Iris=not_installed
Rayleigh System=On
Dye System=Off
Daystar=In
Polerizer=In
HalfWave Plates=Tracking
Filter wheel=3:Open

[1]
90% PMT Iris=not_installed
Rayleigh System=On
Dye System=Off
Daystar=Out
Polerizer=In
HalfWave Plates=Tracking
Filter wheel=2:532/0.5nm

[2]
90% PMT Iris=not_installed
Rayleigh System=On
Dye System=Off
Daystar=Out
Polerizer=In
HalfWave Plates=Tracking
Filter wheel=1:532/1nm

Logsheet:0

Page : 97

Sondrestrom Lidar Operation Log

Log Sheet 1 of 2
Operators : J.Geddes
Date(s) : 980717 - 980718
File(s) : L9807170 - L9807170

Files	Time [UT]	Comments	Cnt	S	Ope
L9807170	22:49:03	Start of experiment	3	0	J.G
L9807170	22:59:14	System is working now. Disregard first 10 minutes of data. Daystar filter was missing.	0	0	J.G
L9807170	23:03:50	HG adjusted	484	0	J.G
L9807170	23:07:21	HG adjusted	573	0	J.G
L9807170	23:12:03	HG adjusted	570	0	J.G
L9807170	23:25:29	System paused at end of record 35. Daystar filter was removed, and 5A 532nm filter was put in its place.	663	1	J.G
L9807170	23:28:23	Data collection resumed. SZA is 81.3 degrees.		1	J.G
L9807170	23:32:27	System paused at end of record 39. Daystar filter was replaced, and 5A 532nm filter was removed.	4249	0	J.G
L9807170	23:35:16	Data collection resumed. SZA is 81.8 degrees.		0	J.G
L9807170	23:40:49	System paused at end of record 45. Daystar filter was removed, and the 5A 532nm filter was put in its place..		1	J.G
L9807170	23:43:35	Data collection resumed. SZA is 82.5 degrees.		1	J.G
L9807170	23:46:22	System paused at end of record 48. Daystar filter was replaced, and the 5A 532nm filter removed.		0	J.G
L9807170	23:48:38	Data collection resumed. SZA is 82.9 degrees.		0	J.G
L9807170	23:54:29	System paused at end of record 54. Daystar filter was removed and replaced with 5A 532nm filter.		1	J.G
L9807170	23:56:32	Data collection resumed. SZA is 83.5 degrees.	4117	1	J.G
L9807170	23:59:28	Data collection paused after record 57. The 5A 532nm filter was removed, and the Daystar was replaced.		0	J.G
L9807170	00:01:55	Data collection resumed. SZA is 83.9 degrees.	813	0	J.G
L9807170	00:08:42	System paused at end of record 64. Daystar filter was removed, and 5A 532nm filter was put in its place.		1	J.G
L9807170	00:10:45	Data collection resumed. SZA is 84.5 degrees.		1	J.G
L9807170	00:13:14	System paused at end of record 67. 5A 532nm filter was removed, and the Daystar filter was replaced.		0	J.G
L9807170	00:15:39	Data collection resumed. SZA is 84.8 degrees.		0	J.G
L9807170	00:24:36	System paused after record 76. Daystar filter was removed, and 5A 532nm filter was put in its place.		1	J.G
L9807170	00:26:46	Data collection resumed. SZA is 85.6 degrees.		1	J.G
L9807170	00:30:19	System paused after record 80. Daystar filter was replaced, and the 5A 532nm filter was removed.		0	J.G

Logsheet:1

Page : 98

Sondrestrom Lidar Operation Log

Log Sheet 2 of 2
Operators : J.Geddes
Date(s) : 980718 - 980718
File(s) : L9807170 - L9807173

Files	Time [UT]	Comments	Cnt	S	Ope
L9807170	00:32:56	Data collection resumed. SZA is 86.0 degrees.		0	J.G
L9807170	00:45:43	System paused after record 93. Daystar filter was removed and replaced with the 5A 532nm filter.		1	J.G
L9807170	00:47:48	Data collection resumed. SZA is 86.9 degrees.		1	J.G
L9807170	00:52:15	System paused after record 98. 5A 532nm filter was replaced with 10A 532nm filter.		2	J.G
L9807170	00:53:33	Data collection resumed. SZA is 87.2 degrees.		2	J.G
L9807170	00:57:29	System paused after record 102. 10A 532 nm filter was removed, and the Daystar filter was replaced.		0	J.G
L9807170	00:59:25	Data collection resumed. SZA is 87.6 degrees.		0	J.G
L9807170	01:09:29	System paused at end of record 111. Daystar was removed, and 5A 532nm filter was put in its place.		1	J.G
L9807170	01:11:42	Data collection resumed. SZA is 88.2 degrees.		1	J.G
L9807171	04:01:42	Computer has recorded a "slow or missing triggers" warning.	3159	1	J.G
L9807173	07:45:19	End of experiment		1	J.G