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Redmine Admin, 08/31/2016 04:25 PM
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) |
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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 |
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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 (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 |