20 sept. 20102 nd galion ws wmo, geneva 1 optimisation of instruments arnoud apituley volker...
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20 Sept. 2010 2nd GALION WSWMO, Geneva
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Optimisation of Instruments
Arnoud ApituleyVolker Freudenthaler
Adolfo Comeron
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Outline
• Goals
• Methodology and Tools
• Progress and Status
• Conclusions
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Goals
• Improving the EARLINET installed base of lidars1. Performance2. Homogeneity3. Operationality
• Selecting optimum technical solutions for instrumental problems
• Recommendations for implementation across the network
• Facilitate expansion of the network20 Sept. 2010 2nd GALION WS
WMO, Geneva3
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Performance• Which parameters should be optimised?
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GA
W r
epor
t 17
8, W
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/TD
-No.
144
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Performance
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• Which lidar configurations?
GA
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Homogeneity?
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Multi-wavelength Raman (3+2)
Raman
Backscatter
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Bilthoven/Cabauw, NL
Barcelona, ES
Athens, GR Garmisch-Partenkirchen, DE
München, DE
Leipzig/Meltpiz, DE
Hamburg, DELinkoping, SE
Granada, ES
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Operationality
• Increase level of automation– e.g. measurement start-up procedures– Full autonomous operation
• Decrease need for operator controlled measurements– e.g. safety and control
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Expected Results
• Enhanced homogeneity of performance over the network– Quantitative data products
• Better coverage of vertical range– Including the boundary layer
• Increased temporal coverage– Improved Raman daytime performance– Increased level of automation (capture events)
• Facilitate expansion of the network• Possible: spin-off to SME for production of standardised
components•
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Expected Results
• Enhanced homogeneity of performance over the network– Quantitative data products
• Better coverage of vertical range– Including the boundary layer
• Increased temporal coverage– Improved Raman daytime performance– Increased level of automation (capture events)
• Facilitate expansion of the network• Possible: spin-off to SME for production of standardised
components• Expansion of deliverable data products
– Cloud products, ash, faster data delivery
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Methodology and Tools
• Handbook of Instruments– Extensive set of system parameters– Exploitation of handbook data
• Repository of techniques – Solutions for technical problems
• Analysis tools– Optical configuration (ray-tracing)– Electronics recommendations and testing
procedures
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Handbook of Instruments
• Detailed description of each individual station
• Generic format to allow wide variety of designs
• Blocks of information– Station information (location,
name, etc.)– Emitter description (wavelengths,
control systems)– Optical receiver– Wavelength separation– Detectors– Data acquisition– Ancillary station information
(nearest sonde, sunphotometer)
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Handbook Example• 1-lambda Backscatter lidar
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R.M
. M
easu
res,
198
4
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Handbook Example• Multi-wavelength Raman Lidar
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MU
LIS
, V
. F
reud
enth
aler
CA
ELI
, A
. A
pitu
ley
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Handbook Updating
• Spreadsheet– Tedious updating process– Difficult to couple to profiles in database
• Database with admin-access via web– Easier to maintain– System configuration traceable to specific date– Automatic access (data processing purposes)– Public interface for general overview
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Handbook Updating
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http://cerberus.rivm.nl/earlinet/earlinet.php
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Handbook Public View
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http://cerberus.rivm.nl/earlinet/index_new.php
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Handbook Public View
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http://cerberus.rivm.nl/earlinet/index_new.php
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Handbook Public View
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http://cerberus.rivm.nl/earlinet/index_new.php
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Analysis Tools
• Optics– Calculate validity
of configuration based on Handbook data
– Raytracing individual instruments
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Repository of Techniques and Solutions
• Techniques are presented and discussed during workshops
• Documentation materials made accessible
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I. S
erik
ov
I. S
erik
ov
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System Integration and Automation
• Recommendations to put sub systems together– Serviceable (modular,
replaceable, upgradable)– Instrument control
software integration– Electrical connections to
avoid problems– Computer Interfacing– Remote control
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Commercial Systems
• Commercially available systems are available– In use in Granada, Leipzig, Evora, Bucharest,
Ispra, Palaiseau– Instruments have to pass through network
QA/QC procedures before data can be accepted in the database
• Common parts– Interact with suppliers for common
specifications and custom configurations
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Progress and Status
• Instrument installed base development since 2000
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Network Development
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2000
22 Instruments
8/22 Raman capable2/22 High performance
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Network Development
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2006
28 Instruments
9/28 Raman capable7/28 High performance
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Network Development
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2010
33 Instruments
27/33 Raman capable14/33 High performance
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Conclusions
• Tools exist for keeping track of the development and quality of the installed base of instruments in the network
• Recommendations and techniques for network participants and aspiring partners available
• Improvement of tools and repository of recommendations is ongoing
• Commercial systems are becoming part of the network
• Network has expanded and performance in terms of network objectives has increased
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