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« TReSS »« TReSS » ATMOSPHERIC OPTICAL REMOTE ATMOSPHERIC OPTICAL REMOTE

SENSING TRANSPORTABLE-MOBILE SENSING TRANSPORTABLE-MOBILE PLATFORMPLATFORM

Pierre H. Flamant, Claude Loth

Juan Cuesta, Dimitri Edouard, Florian Lapouge*

Lidar, Meteorology and Geophysics Team (LiMAG)

Laboratoire de Météorologie Dynamique

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OPTICAL REMOTE SENSING PAYLOADOPTICAL REMOTE SENSING PAYLOAD • Ground based platform easily transportable

• All sky monitoring capability (but not precipitation reaching the ground !)

• Lidar-radiometry Synergism

• Mini-Lidar (designed & built in house using off the shelf components)

– 3 elastic back. channels: 2 x 532 nm (total + ), 1064 nm,

– One Raman back. channel: 607 nm, at night (day ?)

• Sunphotometer (AERONET/PHOTON) 8 channels: 340, 380, 440, 500, 670, 870, 936 & 1020 nm

• Pyranometer

• IR radiometer (day/night): 9.5 – 11.5 µm, 2° FOV

• Optical Depth Sensor (day/moon)

• Web Cam: monitoring clear or cloudy sky, cloud track wind

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MINI-LIDARMINI-LIDAR

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OBJECTIVESOBJECTIVES

• Science Objectives– ABL dynamics, Aerosols life cycle and cloud interaction, cirrus

life cycle, aerosols & clouds Radiative properties, …

– AMMA in 2006 (African Monsoon)

– Calipso & A-Train Validation

• Requirements– All sky monitoring capability (but no precipitation …)

– Turn key operation, Hands-off operation

– Real time monitoring (on going)

– Easy caring and low cost operation

– Easy to transport for field experiments

– High time resolution: 10 sec averaging (or 200 shots) about 50 m

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LIDAR TIME SERIES (1/2)LIDAR TIME SERIES (1/2)Relative calibration using computed molecular backscatter signals (radiosondes or analysis

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LIDAR TIME SERIES (2/2)LIDAR TIME SERIES (2/2)

Saharan dust Saharan dust Siberia/North American dust

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TRANSPORTABLE-MOBILE PLATFORMTRANSPORTABLE-MOBILE PLATFORM

20’sea containerAdverse & bad weather condition Light Mobile Platform

Fair & friendly weather condition

2 min to put up or down the mobile platform equipped with TReSS remote sensors

Truck loaded with Mobile Platform ready to go

A dedicated hard wall mobile platform is under purchase to be available for the CALIPSO validation in France mid 2005

Truck and driver to be provided by École PolytechniqueBut rental trucks are available in case of schedule conflict

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« TReSS » LEVEL 1 & 2 PRODUCTS« TReSS » LEVEL 1 & 2 PRODUCTS

Mini-Lidar– Apparent Backscatter (normalized)– Depolarization ratio– Color Ratio– Cloud and Aerosol mask– Scene classification

Radiometers– Aerosol Optical Thickness (Visible and near IR)– Solar Flux (Direct + Diffuse) / Shortwave atmospheric transmission– IR effective Radiance / Brightness temperature

Synergism – Cloud & aerosols back.-to-extinction ratio– more, operational algos under development by Juan Cuesta…