Description

Page : 1852

Sondrestrom Lidar Operation Log

Operator(s) : Christian Have Pedersen
Purpose : Tests of RaNa indicator light through fiber.
Date(s) : 070918 - 070918
File(s) : L20070912_002 - L20070918_001
Comments : LED return weak but usefull. Profile is slooped and may not be sharp enough to be
used as a reliable marker in the combined RaNa profile.
Logfile : L0709180.log

Setup:0

Page : 1853

Logsheet:0

Page : 1854

Sondrestrom Lidar Operation Log

Log Sheet 1 of 1
Operators : Christian Have Pedersen
Date(s) : 070918 - 070918
File(s) : L20070912_002 - L20070918_001

Files	Time [UT]	Comments	S	Ope
L20070912_002	15:50:46	Start of experiment	0	cp
L20070912_002	15:50:52	Measuring profile of light from fiber to be used in combined	0	cp
		RaNa Lidar setup.
L20070918_001	16:12:07	Test diode is flashing at 400 Hz. Duty cycle 20%.	0	cp
		So lamp is on 500us. The return is weak, but still usefull I think.
		The LED driver for this test has a minimum duty cycle of
		20%. But a guess is that this LED turn on/off period is
		approx. 100 us. I do not know if the slooped shape
		in the profile is distinct enogh to be used as a marker
		between the Raman and Sodium return profiles
		Test of other LED's with other drivers will follow
L20070918_001	16:25:20	End of experiment	0	cp