us calibration/validation activities for the adm/aeolus mission
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US Calibration/Validation Activities for the ADM/Aeolus Mission. Mike Hardesty and Lars-Peter Riishojgaard. Cal/Val information from Recent ADMAG. Purpose of Cal/Val exercise Quantify accuracy of primary and auxiliary parameters Characterize deviations - PowerPoint PPT PresentationTRANSCRIPT
US Calibration/Validation Activities for the ADM/Aeolus Mission
Mike Hardestyand
Lars-Peter Riishojgaard
Cal/Val information from Recent ADMAG
• Purpose of Cal/Val exercise– Quantify accuracy of primary and auxiliary
parameters– Characterize deviations– Recommendations for improvements to
processing
• Two phases will be commissioned: First (commissioning) and Second (routine)
• Call will be worldwide• Proposers must bring their own funding• Access to data only through cal-val team• Announcement of Opportunity: October 1
Does ALADIN need calibration or only validation? burst-mode operation: Can time and location of satellite
observation be predicted or even commanded, e.g. by start time of laser burst operation?
opportunity for validations for 50-km scale observations satellite-ground: once every 5-10 days in 50 km distance satellite-aircraft: 2-3 flights in 1 geographical region with 7 s
observation time on satellite compared to 4 minutes on aircraft => allows to study measurement (1-10 km) to observation scale (50 km) issues
Ground wind observations of horizontal wind vector needs to be projected onto satellite LOS direction
L1B Mie winds can be validated with wind measuring instruments; L1B Rayleigh winds (uncorrected for T) can not be validated with other wind measuring instruments, except with A2D which measures also uncorrected Rayleigh wind
L2A aerosol products (backscatter, extinction, cloud base) can be validated, but most ground based lidars point toward zenith
L2B wind products can be validated both for Mie and Rayleigh
Specific ADM-Aeolus issues for airborne and ground validations (Oliver Reitebuch)
1a/b. What are Level-2B/2C Products?
L2C Product
Assimilation
(L2C Processor)
Other observations Forecast ModelL2B Product
L2B Processor
L1B ProductProcessing
ParametersAuxiliary Data
Retrieval algorithm accounts for T & p effects in Rayleigh channel signal
Meteorologically representative wind
vector profiles
Meteorologically representative hlos
profiles Measurements grouped and weighted according to features detected in atmospheric scene (primarily clouds & aerosol)
Meteorological
products
Assembling a US cal/val effort
• Develop a proposal to respond to ESA AO– Put together a team
• Define major elements of a US cal/val effort– Direct Observations for comparison– Data evaluation through assimilation into
models
• Explore funding opportunities (ESA will not provide funding)
Potential Direct Observations
• Long term, statistical comparisons– NWS Wind Profiler Network– Boundary layer profilers– Radiosondes– In situ sensors on commercial aircraft– Cloud track winds – Water vapor winds– Surface based lidar measurements during satellite
overpasses
• Measurement comparison campaigns– TwiLite Airborne lidar– TODWLS – NOAA Airborne HRDL– Notional Hybrid lidar (direct and coherent)
How to proceed?
• Develop a basic outline for the cal/val effort– MH and LPR will be points of contact – Interested parties should provide input and
outline potential contributions within next two months
• Develop funding sources– Potential for funds in the FY 2010 NOAA budget
for ADM cal-val activities– Explore opportunities for NPOESS, NASA and
DOD funding
• Riishojgaard and Hardesty will develop proposal for submission