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Abstract

This paper describes a new Lidar type instrument which was developed by the JRC and CISE to monitor oil slicks on the sea surface. It has been specifically designed to allow the identification of the oil type from the spectro-temporal characteristics of the laser induced fluorescence. The possibility of such a fingerprinting was demonstrated by an extensive laboratory study conducted on 10 crude oils representative of those transported in European waters. The proposed fingerprint signature is based on the decay times measured in five selected spectral bands of the visible fluorescence. These range from 0.5 ns to about 8 ns and were found to provide a better discrimination than the fluorescence spectra alone. The feasibility of fingerprinting from a distance was assessed by performing ground remote measurements with a purpose-built simulation facility. The airborne Time Resolved Lidar Fluorosensor (TRLF) includes a number of innovative features. It employs a mode-locked Nd-YAG laser delivering sub-nanosecond pulses and a receptor based on a polychromator coupled to a streak camera. Such a system allows the acquisition of the full spectro-temporal information from one single laser shot and provides a temporal resolution of about 1 ns.

Additional information

Authors: BERTOLINI G, JRC Ispra (IT);KOECHLER C, JRC Ispra (IT);VERDEBOUT J, JRC Ispra (IT);CAVALCABO G ET AL., CISE SpA, Milano (IT)
Bibliographic Reference: Paper presented: 15th International Laser Radar Conference, Tomsk (SU), July 23-27, 1990
Availability: Text not available
Record Number: 199011521 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en
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