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Development of the Lidar Atmospheric Sensing Experiment (LASE): An Advanced Airborne DIAL InstrumentThe Lidar Atmospheric Sensing Experiment (LASE) Instrument is the first fully-engineered, autonomous Differential Absorption Lidar (DIAL) System for the measurement of water vapor in the troposphere (aerosol and cloud measurements are included). LASE uses a double-pulsed Ti:Sapphire laser for the transmitter with a 30 ns pulse length and 150 mJ/pulse. The laser beam is "seeded" to operate on a selected water vapor absorption line in the 815-nm region using a laser diode and an onboard absorption reference cell. A 40 cm diameter telescope collects the backscattered signals and directs them onto two detectors. LASE collects DIAL data at 5 Hz while onboard a NASA/Ames ER-2 aircraft flying at altitudes from 16-21 km. LASE was designed to operate autonomously within the environment and physical constraints of the ER-2 aircraft and to make water vapor profile measurements across the troposphere to better than 10% accuracy. LASE has flown 19 times during the development of the instrument and the validation of the science data. This paper describes the design, operation, and reliability of the LASE Instrument.
Document ID
20040110422
Document Type
Preprint (Draft being sent to journal)
Authors
Moore, Alvah S., Jr. (NASA Langley Research Center Hampton, VA, United States)
Brown, Kevin E. (NASA Langley Research Center Hampton, VA, United States)
Hall, William M. (NASA Langley Research Center Hampton, VA, United States)
Barnes, James C. (NASA Langley Research Center Hampton, VA, United States)
Edwards, William C. (NASA Langley Research Center Hampton, VA, United States)
Petway, Larry B. (Science Applications International Corp. Hampton, VA, United States)
Little, Alan D. (NASA Langley Research Center Hampton, VA, United States)
Luck, William S., Jr. (NASA Langley Research Center Hampton, VA, United States)
Jones, Irby W. (NASA Langley Research Center Hampton, VA, United States)
Antill, Charles W., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1997
Subject Category
Instrumentation and Photography
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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