NASA`s airborne oceanographic lidar: A two excitation frequency laser fluorosensor

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:379491

Wright, C W ^[1]

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1. NASA Goddard Space Flight Center, Wallops Island, VA (United States)

NASA has recently designed its AOL to acquire individual laser-induced fluorescence (LIF) spectra from two excitation frequencies emitted from a single laser transmitter. The backscattered laser-induced fluorescence (LEF) signal from each of the separate two footprints pass through the same optical train to form separate spectral images upon the focal plane of the AOL spectrometer. Other major modifications include a redesign of the AOL spectrometer to provide substantial reduction of scattered light and the inclusion of a narrow band (notch) holographic filter to reject 532nm radiation from the spectrometer. Results from initial mission show good signal-to-noise characteristics and has demonstrated high precision resolution for the measurement of chromophobic dissolved organic matter, chlorophyll, and phycoerythrin (an axillary pigment found in marine phytoplankton). The most significant result of these recent engineering modifications has been the development of the capability of the AOL to capture clean LEF signals from the two phycoerythrin pigments, phycourobilin and phycoerythrobilin. 12 refs., 4 figs.

• OSTI ID: 379491
• Report Number(s): CONF-960613--
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
54 ENVIRONMENTAL SCIENCES
FLUORESCENCE SPECTROSCOPY
NASA
OPTICAL RADAR
PERFORMANCE TESTING
SEAS