UPDATE ON THE ATMOSPHERIC DYNAMIC

MISSION (ADM)Pierre H. FLAMANT

ADM Advisory Group

Working Group on Space-Based Lidar WindsBar Harbor, Maine, 23-25 June, 2003

USEFUL CLARIFICATIONUSEFUL CLARIFICATION

• Atmospheric Dynamic Mission is the 2nd Earth Explorer Mission selected in 1999 for a launch in 2007

• Fully funded• Satellite : ALADIN• Instrument : ÆOLUS• Project Manager : Peter Dubock• Instrument Manager : Martin Endemann• Most informations provided here were collected during

the 7th ADMAG Meeting held 3-4 April, 2003• For an update, ADM-ÆOLUS is on the WEB via ESA

portal : www.esa.int

HOW THINGS WORK AT ESAHOW THINGS WORK AT ESA

ESTECADM

Mission Managment

Advisory Group Industry

•Advice•Studies •Studies

•Developments

BOARD OF MINISTERS

ESA

ALADIN ÆOLUS SATELLITEALADIN ÆOLUS SATELLITE• In 2007 …• Wind Lidar using direct

detection• It is a High Spectral Resolution

Lidar : the scattered light from molecules and particles are separeted by the receiver interferometer and processed independently i.e. two channels

• The Lidar single LOS looks at 35° from nadir and 90° from the direction of motion to cancelled the huge Doppler frequency shift associated to 7 km sec-1 velocity

• The wind horizontal velocity will be computed over 50 km at maximum

ISSUES AT BEGINNING & ISSUES AT BEGINNING & WORRIESWORRIES

• Laser transmitter ! 150 mJ per pulse Single mode at 355 nm, 100 Hz, Burst mode– Two studies in parallel

• Mie Receiver : Two concepts in competition i.e. Fizeau or Two beam MZ-M interferometer– MZ-M Study

• Molecular lineshape : Brillouin doublet

Latest news from the Project i.e. Martin Endemann (1/2)

• The meeting in the US is a bit too early - we expect nice pictures to arrive for the PDR in September 2003

• For the time being, we have only the pictures that I have showed at the previous 7th ADMAG, showing the overall configuration of ÆOLUS and the ALADIN spacecraft. It still is the most current design concept

• The receiving telescope is shown with a diameter of 1.5 m

Latest news from the Project i.e. Martin Endemann (2/2)

• A Laser consortium has been selected in a restricted competition. The Laser team is lead by Galileo Avionica (Pomezia and Firenze), with Quantel (Paris), CISE (Milano), TESAT (Stuttgart) and Thales Laser Diodes (Paris) as subcontractors

• The Mie receiver selected for further design analysis is the Mie receiver which has fewer engineering unknowns (i.e. Fizeau Interferometer) than the novel Two-beam Interferometer.

OVERVIEWOVERVIEW

Yellow cans : 2 star trackersGolden panel : Laser radiator connected to the 2 Laser headsIn red : Heat pipes from Laser packages inside the ÆOLUS structure Grey : ÆOLUS structure The Receiver baffle is cut assy-metrically to reduce atmospheric dragSmall yellow sticks are the com-munication antennas (to down link data & telemetry)

LAUNCHER SIDELAUNCHER SIDE

EARTH SIDEEARTH SIDE

MISSION IMPLEMENTATION : MISSION IMPLEMENTATION : PHASE B STATUSPHASE B STATUS

• Instrument Base Line Review in July 2003 : Prime contractor Astrium UK will review ÆOLUS

• Preliminary Design Review in September 2003 : ESA will review the status of the complete ALADIN satellite

• Beginning of Phase C/D in October 2003• All ÆOLUS is broken down in a bout 50 subsystems• Most ÆOLUS subsystems are being procured in open

competition (ITTs)• Most of the subcontracts must be assignated to

contractors by July 2003• Procurement packages need to be published on EMITS

before

MISSION IMPLEMENTATION : MISSION IMPLEMENTATION : MISSION STATUSMISSION STATUS

• ÆOLUS End-to-end Instrument Simulator. Kick-Off: Oct. 2003

• Level 1B operational ground processor : near-real-time processing chain, additional modules for calibration. Kick-Off: Oct. 2003

• ALADIN Ground segment (responsability : ESRIN)

• ALADIN Flight Operation segment (ESOC)• ALADIN X band stations

MISSION IMPLEMENTATION : MISSION IMPLEMENTATION : PRE-DEVELOPMENT MODELPRE-DEVELOPMENT MODEL

• Optical Bench delivered in Nov. 2002• Detection Electronics Units in Oct. 2002• Electrical Ground Support Equipment in Nov. 2002• Optical Ground Support Equipment to simulate

atmospheric returns in March 2003• Accumulation CCDs in Dec. 2002• Dual Fabry-Perot Rayleigh Spectro. in Feb. 2003• Fizeau Mie Interferometer planned in April 2003• Detection Front-End Units planned in April 2003

MISSION IMPLEMENTATION : MISSION IMPLEMENTATION : Assessement Test Program for Assessement Test Program for

Pump Laser DiodesPump Laser Diodes

• Quasi CW Laser Diodes (Burst mode)– Two contracts : Thales, Dilas

• CW Laser Diodes (Seeder)– Two contracts : InnoLight, Ferdinand Braun

Institute

MISSION IMPLEMENTATION : MISSION IMPLEMENTATION : Laser Transmitter BreadboardLaser Transmitter Breadboard

• Two contracts in parallel with Astrium GmbH & Galileo Avionica

• Laser breadboard to demonstrate energy level in UV (355 nm)

• Transportable Laser transmitter test bed to be integrated in the ÆOLUS PDM

MISSION IMPLEMENTATION : MISSION IMPLEMENTATION : Airborne DemonstratorAirborne Demonstrator

• Astrium-DLR activity : see next talk by Oliver Reitebuch

SUPPORTING SCIENTIFIC SUPPORTING SCIENTIFIC STUDIESSTUDIES

• Measurement Error and Correlation Impact on the Atmospheric Dynamics Mission by KNMI

• ON GOING :– Expected benefits of DWL for Data

Assimilation by ECMWF

– Variational data assimilation in the tropics by MISU

– High Impact Weather (1) by KNMI– High Impact Weather (2) by DWD

SUPPORTING SCIENTIFIC SUPPORTING SCIENTIFIC STUDIESSTUDIES

• PLANNED (in FALL 2003) :– Quality Control Methodology & Tools– Independent review of level 1B processor

work– Maintenance & updating of ÆOLUS

reference simulator– Level 2 wind processor algorithms (i.e.

accoun-ting for atmospheric variables & lineshape, …)

– Other level 2 data products (i.e. clouds & aerosols layers properties)

NOT YET (REALLY) DISCUSSEDNOT YET (REALLY) DISCUSSED

• Data dissimination • Post launch Validation activities• Outreach• …

MORE …

• Next ADMAG mid October 2003