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Constraints » History » Version 43

Mario Mech, 09/27/2016 10:14 AM

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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), Andreas Fix (DLR-IPA), Silke Groß (DLR-IPA), Axel Amediek (DLR-IPA)
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| Lutz Hirsch (MPI-H), Friedhelm Jansen (MPI-H), Martin Hagen (DLR-IPA), Florian Ewald (DLR-IPA)
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| Heike Konow (U Hamburg), Mario Mech (U Köln)
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| Kevin Wolf (U Leipzig), André Ehrlich (U Leipzig), Manfred Wendisch (U Leipzig)
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| Tobias Kölling (LMU-MIM), Tobias Zinner (LMU-MIM), Hans Grob (LMU-MIM), Bernhard Mayer (LMU-MIM)
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| Christian Mallaun (DLR-FX), Martin Zöger (DLR-FX), 
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||Oliver Reitebuch (DLR-IPA), Christian Lemmerz (DLR-IPA), Engelbert Nagel (DLR-IPA), Oliver Lux (DLR-IPA), Uwe Marksteiner (DLR-IPA)
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| Benjamin Witschas (DLR-IPA),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 (< 6 km saturation of the radar receiver,  > 13.7 km no ground-echo) 
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||Only daylight Operation, avoid solar elevation<15°, operation time: 0730-1600 UTC
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| Only daylight Operation, 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 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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|prefered above all clouds, clear sky dropsondes for validation
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|straight legs (min. 5 min)
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|Straight legs
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|||dropsondes fom HALO beneficial for profiles of temperature and hor. wind vector||
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|  *Clouds*
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|  * 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 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 (90 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 French Falcon*
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| Intercomparison with LNG (Leandre New Generation)
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| Intercomparison with RASTA 95 GHz cloud Radar
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