FTIR campaigns at Ile de la Réunion Corinne Vigouroux , Martine De Mazière, A.C. Vandaele, E. Neefs, F. Scolas, T. Egerickx, C. Hermans, K. Janssens Belgian Institute of Space Aeronomy, Brussels, Belgium B. Barret, P.F. Coheur, S. Fally, M. Carleer, R. Colin Université Libre de Bruxelles, Brussels, Belgium and J. Leveau Université de La Réunion, S t Denis, Ile de La Réunion / France
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FTIR campaigns at Ile de la Réunion Corinne Vigouroux, Martine De Mazière, A.C. Vandaele, E. Neefs, F. Scolas, T. Egerickx, C. Hermans, K. Janssens Belgian.
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FTIR campaigns at Ile de la Réunion
Corinne Vigouroux, Martine De Mazière, A.C. Vandaele, E. Neefs, F. Scolas, T. Egerickx, C. Hermans, K. Janssens Belgian Institute of Space Aeronomy, Brussels, Belgium
B. Barret, P.F. Coheur, S. Fally, M. Carleer, R. ColinUniversité Libre de Bruxelles, Brussels, Belgium
and
J. LeveauUniversité de La Réunion, St Denis, Ile de La Réunion / France
Measurement site locations
Site 1:Université de La RéunionAltitude: 50 m20°54’ S – 55°29’ E
Site 2:Piton du MaïdoAltitude: 2203 m21°04’ S – 55°23’ E
Solar trackerSite 1:
Université de La Réunion
Site 2: Piton Maïdo
Solar TrackerMeteo Station
FTS inside cabin:
Bruker IFS 120 M
Site 2: setup at Piton Maïdo
Scientific :
– Initiate long-term monitoring of the atmospheric composition at a (sub)tropical site by FTIR remote-sensing, in the frame of NDSC.
– Validation of satellite experiments, in particular ACE/SciSAT1.
Technological :
– test BARCOS (Bruker Automation and Remote COntrol System, Neefs et al., 2003) at Maïdo.
Campaigns Objectives
Purpose :
• Measurements in an automatic mode – including remote control options :
Run several days without human assistance, at any time and any geographical location.
Working principle :
• Each day: finds, loads and executes a script for that day.
• Script : list of commands wearing a tag (time or zenith angle) to indicate when the command has to be executed.
BARCOS
BARCOS includes :
• An elementary scripting language
• Solar tracker
• Meteorological station to condition the observations (rain detector, sensors for wind, ambient pressure and direct solar irradiance)
• A data logger and a GPS receiver
• Software (in Labview) for housekeeping, suntracker commanding and interaction with the FTS software (OPUS)
Parallel manual and remote/automatic control are possible
BARCOS solar tracker :
• Can be :
- Bruker solar tracker (BST) - Denver solar tracker(DST) (collaboration with T. Stephen and T. Hawat of Denver Univ.)
• Operating options for DST : - tracking mode : on CCD image of target = sun, moon, star,... - calculated mode - automatic mode
• DST : Image allows cloud detection
Under development
• Automatic Liquid N2 filling• Wireless access to internet for remote control and data
exchange
• Exploitation of meteo data to condition the choice of used spectra:
Time h,min,sec
Time measurement of a spectrum: a few minutes
SCIENTIFIC DATA
Maïdo (2203 m)
University (50 m)
MOPD = 125 125 101/175.5 125/250 82/125/250
Strong absorption of WaterVapor near the sea level
Spectral regions (NDSC filters)
• Near- and mid-IR, covering 600- 4400 cm-1.
• Best spectral resolution = 3.5 10-3 cm-1 (MOPD=250 cm)
• Large number of stratospheric and tropospheric gases :