Constraints » History » Version 40

Version 39 (Redmine Admin, 08/31/2016 04:25 PM) → Version 40/44 (Friedhelm Jansen, 09/24/2016 08:21 AM)

h1. Instrumental Constraints

||*WALES* | *HAMP Radar* | *HAMP Radiometer*| *SMART*** | *specMACS*| *Bahamas*||*A2D wind lidar*|*2micron wind lidar*|
|*Responsible People*
| Martin Wirth (DLR-IPA), Andreas Fix (DLR-IPA), Silke Groß (DLR-IPA), Axel Amediek (DLR-IPA)
| Lutz Hirsch (MPI-H), Friedhelm Jansen (MPI-H), Martin Hagen (DLR-IPA), Florian Ewald (DLR-IPA)
| Mario Mech (U Hamburg)
| Kevin Wolf (U Leipzig), André Ehrlich (U Leipzig), Manfred Wendisch (U Leipzig)
| Tobias Kölling (LMU-MIM), Tobias Zinner (LMU-MIM), Hans Grob (LMU-MIM), Bernhard Mayer (LMU-MIM)
| Christian Mallaun (DLR-FX), Martin Zöger (DLR-FX),
||Oliver Reitebuch (DLR-IPA), Christian Lemmerz (DLR-IPA), Engelbert Nagel (DLR-IPA), Oliver Lux (DLR-IPA), Uwe Marksteiner (DLR-IPA)
| Benjamin Witschas (DLR-IPA),Stefan Rahm (DLR-IPA)
|*Number of Operators*|1-2|1-2|||1|0||1|1|
|*Instrument Operation*
| No operation below 6 km possible
| Operation between 6 and 13.7 km (lt 6 km saturation of the radar receiver, gt13.7 km no ground-echo)
||Only daylight Operation, avoid solar elevation<15°, operation time: 0730-1600 UTC
| Only daylight Operation, as high above clouds as possible
* swath in 1.5km: 0.9 km (spec Macs); 2.1 km (2D cam)
* swath in 5.0km: 3.0 km (spec Macs); 7.0 km (2D cam)
| * Reduced accuracy during dust and salt contamination by high aerosol load during low level flights
* Reduced data quality in precipitation and clouds (water/ice in pressure tube)
||* no data 1.5 km below aircraft
* limited number of 16-18 range gates (vert. res. 0.3/0.6/1.2 km)
* to be addapted to science obj.
* first obs 45 min after take-off
* no operation< 5km (eye-safety)
| * obs after 15 min
* no data 500 m below aircraft|
|*Flight Planning Requirements*
|Preferably straight legs
|Min FL 200 (6 km)
Max FL 450 (13.7 km)
|one clear sky flight, one dropsonde per flight,
|straight legs (min. 5 min)
|Straight legs
|||dropsondes fom HALO beneficial for profiles of temperature and hor. wind vector||
| *Clouds*
| * best performance in a distance of 2 km to cloud top
* no measurements in clouds
|||above clouds (min 500 ft)
| ideally no clouds above
|||avoid flying within or 1-2 km above cirrus clouds
| at high flight level or close to the aircraft are unfavorable an prevent wind profiles|
| *Instrument Calibration*
|| cirles over the sea with 10° bank (15 min/circle) during 1-2 research flights (calm and rough sea)
| at ground, before each research flight (90 (30 min), with liquid nitrogen
| * Radiation box (4x2min legs), clear sky above
* regular cal at ground (between flights), about 1h
||||* 1 double flight to Kangelussuaq needed for A2D cal over Greenland ice sheet
* scan-pattern if situation allows (retrieve hor. wind vector)
|at the beginning of the campaign: several min with vis to ground at constant FL (~FL300) to determine Installation position|
|*Satellite Overpasses*||Cloudsat, GPM||A-Train (AQUA/TERRA)|A-Train (AQUA/TERRA)|||ASCAT||
|*Coordination with French Falcon*
| Intercomparison with LNG (Leandre New Generation)
| Intercomparison with RASTA 95 GHz cloud Radar