Abstract

A balloon-borne microlidar has been built at LATMOS to monitor cirrus optical properties and convective overshoot topography during long duration flights in the lower tropical stratosphere. Weighting less than 7 kg in a reduced volume and consuming less than 10 W, it will be involved in the CNES-Strateole2 campaign. This instrument paves the way to the use of microlidar technology for planetary missions.

Highlights

  • The Centre National d'Etudes Spatiales (CNES) project Strateole2 aims at flying different configurations of multi instrumented open stratospheric balloons (OSB) in the lower tropical stratosphere to study the tropical tropopause layer (TTL)

  • The telescope with its two lenses can be seen in the lower “cold” volume of the gondola

  • The use of optical fibers between the components of the microlidar eases the integration of the system, to separate the telescope and the thermally sensitive parts

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Summary

Scientific context and objectives

The CNES project Strateole aims at flying different configurations of multi instrumented open stratospheric balloons (OSB) in the lower tropical stratosphere to study the tropical tropopause layer (TTL). The BeCOOL (Balloonborne Cirrus and convective overshOOt Lidar) system was conceived to be one of the payloads of the OSB configurations (see Fig.). The BeCOOL (Balloonborne Cirrus and convective overshOOt Lidar) system was conceived to be one of the payloads of the OSB configurations (see Fig.1) This profiler will measure optical properties of cirrus in nadir viewing mode and characterize the upper topography of convective system. The insulated hexagonal shaped boxes used to contain parts of the instrument are shown in brown They are located in the same volume as the batteries and other instruments. The use of optical fibers between the components of the microlidar eases the integration of the system, to separate the telescope (located in the “cold” area of the gondola) and the thermally sensitive parts.

First balloon-borne measurements
Conclusion and Perspectives
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