HALO-20240813a

HALO-20240813a#

Forian Ewald, Tanja Bodenbach, Georgios Dekoutsidis, Theresa Mieslinger, Sophie Rosenburg, Lea Volkmer, Bjorn Stevens, Martin Singh

track

Describe the meteorology

Describe the flight execution

HALO-20240813a underpass distance 31 m at 2024-08-13T15:39:53.0 s

(itemized list of things you saw)

north of the ITCZ edge shallow clouds were overlayed by a heavy dust layer. Cirrus clouds aloft.
about 138 nm from SAL there was an abrupt drop of about 5mm in the PW
EC meeting point at 15:41:30 UTC on slightly lower FL360
passing by the northern circle on the EC track there are very calm surface winds obvious from a narrow sun glint spot in specMACS and high radar reflectivity from the surface at around 15:55 UTC

Note

Co-location with ATR and EarthCARE over an aerosol layer near SAL. Spectacular line of convection on southern edge toward the west.

Scientific Crew

Developing cell with blow-off (17:01:53 UTC)

Close up of leading cell on line (17:03:06 UTC)

Line from south (18:29:07 UTC)

Cloud bow on return (19:07:16 UTC)

Sun setting in dirt (20:06:16 UTC)

Instrument	Operational	Comment
BACARDI	✅	no entry
BAHAMAS	✅	no entry
Dropsondes	✅	50 sondes in total, 1 on the EC track and 49 sondes distributed over 4 circles with 1 launch detect failure in `c_north`
HAMP	✅	no entry
PI-Camera	✅	MM-DD:hh:mm:ss reset based on Bjorn’s watch (within 1s of Bahamas time) betwen DSC_6548 and DSC_6549, year inadvertently set to 2019
Smart	✅	Upper sensor was fixed and the downward irradiance Fdw has to be corrected. For quicklooks the offset angles have been approximated so Fdw has to be regarded as preliminary.
SpecMACS	✅	Nadir measurements started about 20 min after takeoff due to temperature issues. Some ice on one of the side cameras just before it got dark. Measurements stopped at 20:30 UTC due to darkness.
VELOX	✅	VELOX fully functional; KT-19 affected by condensation
WALES	✅	no entry