NAWDEX - North Atlantic Waveguide and Downstream Impact Experiment

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,gt 13.7 km no ground-echo) 

||* only daylight Operation

* avoid solar elevation<15°

* operation time: 730-16 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 (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 F.Falcon|Intercomparison with LNG (Leandre New Generation)| Intercomparison with RASTA 95 GHz cloud radar||||||||