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Constraints » History » Version 19

Redmine Admin, 08/31/2016 04:16 PM

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h1. Instrumental Constraints
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||*WALES* | *HAMP Radar* | *HAMP Radiometer*| *SMART*** | *specMACS*| *Bahamas*||*A2D wind lidar*|*2micron wind lidar*|
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|Responsible People
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| Martin Wirth (DLR-IPA) 
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Andreas Fix (DLR-IPA)
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Silke Groß (DLR-IPA)
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Axel Amediek (DLR-IPA)
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|Lutz Hirsch (MPI-H)
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Friedhelm Jansen (MPI-H)
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Martin Hagen (DLR-IPA)
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Florian Ewald (DLR-IPA)
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|Mario Mech (U Hamburg)
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|Kevin Wolf (U Leipzig)
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André Ehrlich (U Leipzig)
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Manfred Wendisch (U Leipzig)
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|Tobias Kölling (LMU-MIM)
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Tobias Zinner (LMU-MIM)
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Hans Grob (LMU-MIM)
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Bernhard Mayer (LMU-MIM)
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|Christian Mallaun (DLR-FX)
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Martin Zöger  (DLR-FX)
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||Oliver Reitebuch (DLR-IPA)
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Christian Lemmerz (DLR-IPA)
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Engelbert Nagel (DLR-IPA)
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Oliver Lux (DLR-IPA)
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Uwe Marksteiner (DLR-IPA)
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|Benjamin Witschas (DLR-IPA)
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Stefan Rahm (DLR-IPA)
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|
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|Number of Operators|1-2|1-2|||1|0||1|1|
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|Instrument Operation
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| No operation below 6 km possible
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| Operation between 6 and 13.7 km (lt 6 km saturation of the radar receiver,gt 13.7 km no ground-echo) 
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||* only daylight Operation
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* avoid solar elevation<15°
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* operation time: 730-16 UTC
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|* only daylight Operation
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* as high above clouds as possible
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* swath in 1.5km: 0.9 km (spec Macs); 2.1 km (2D cam)
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* swath in 5.0km: 3.0 km (spec Macs); 7.0 km (2D cam)
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|* Reduced accuracy during dust and salt contamination by high aerosol load during low Level flights 
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* Reduced data quality in precipitation and clouds (water/ice in pressure tube)
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||* no data 1.5 km below aircraft
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* limited number of 16-18 range gates (vert. res. 0.3/0.6/1.2 km) 
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* to be addapted to science obj.
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* first obs 45 min after take-off
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* no operation< 5km (eye-safety)
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|* obs after 15 min
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* no data 500 m below aircraft|
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|Flight Planning 
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Requirements
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|Preferably straight legs
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|Min FL 200 (6 km)
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Max FL 450 (13.7 km)
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|one clear sky flight
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one dropsonde per flight
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|straight legs (min. 5 min)
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|Straight legs
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|||dropsondes fom HALO beneficial for 
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profiles of temperature 
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and hor. wind vector||
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|Clouds|* best performance in a distance of 2 km to cloud top
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* no measurements in clouds
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|||above clouds (min 500 ft)
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|ideally no clouds above
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|||avoid flying within or 
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1-2 km above cirrus clouds
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|at high flight level or close to the aircraft are unfavorable an prevent wind profiles|
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|Instrument Calibration
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||cirles over the sea with 10° bank (15 min/circle) during 1-2 research flights (calm and rough sea)
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|at ground, before each research flight (30 min), with liquid nitrogen 
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|* Radiation box (4x2min legs), clear sky above
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* regular cal at ground (between flights), about 1h
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||||* 1 double flight to Kangelussuaq needed for A2D cal over Greenland ice sheet
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* scan-pattern if situation allows (retrieve hor. wind vector)
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|at the beginning of the campaign: several min with vis to ground at constant FL (~FL300) to determine Installation position|
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|Satellite Overpasses||Cloudsat, GPM||A-Train (AQUA/TERRA)|A-Train (AQUA/TERRA)|||ASCAT||
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|Coordination with F.Falcon|Intercomparison with LNG (Leandre New Generation)| Intercomparison with RASTA 95 GHz cloud radar||||||||