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Aeronautics | 01. September 2016 | posted by Fabian Locher | 3 Comments

A day in the tropical sky

Flugplatz Togo
Credit: DLR (CC-BY 3.0)
The apron of the hangar – the Falcon is ready for more measurements

It is the middle of the night on the coast of West Africa. A team of sleepy aircraft technicians and atmospheric researchers exit the hotel lobby. The humidity hits them like a brick wall – it is already 25 degrees Celsius outside. Their departure for Gnassingbé Eyadéma Airport is scheduled at four AM sharp. The first motorcycles of the day thunder past the walls of the hotel complex. Today’s take-off is set for 09:30. But the chauffeurs are late – again.

At 04:30, two cars drive up along the beach promenade through the still quiet streets of Lomé, the capital city of Togo.

Credit: DLR (CC-BY 3.0)
En route to the hangar via Boulevard Du Mono.

Twenty minutes later, the group reaches their destination – a small hangar next to the international airport. Waiting for them, ready for use, is the Falcon 20E , a very reliable member of DLR’s fleet of research aircraft. read more

Aeronautics | 29. May 2015

WindVal: Petta reddast

Betanken der Falcon vor dem Start
Credit: DLR (CC-BY 3.0)
Falcon ready for the jet stream flight, in the background is the NASA DC-8

In Iceland you hear one phrase very often: 'petta reddast', which can be translated as "it will all work out okay". With that in mind, we started planning the flight to have a closer look at strong changes in the horizontal and vertical gradients of the wind speeds in the atmosphere, which is one of the key objectives of the ADM-Aeolus WindVal campaign.

When operating from Iceland, the ideal target region for such an endeavour is in or near a jet stream (fast flowing current in the atmosphere with a meandering shape) over the North Atlantic that is within range of the aircraft. The situation on Friday 15 May 2015 offered a great opportunity to address this aim and coordinate with the NASA DC-8 to observe strong jet stream winds. We have total of four wind lidar systems on the two aircraft, the DC-8 and DLR’s Falcon. read more

Aeronautics | 21. May 2015

ARCTIC15 Field Campaign

Forschungskampagne in Grönland
Credit: Silvan Leinss
The other, more beautiful side of field work. -22 degrees Celsius without wind on a sunny day can feel quite warm and comfortable. Perfect working conditions!

ARCTIC15 is a campaign promoted by the Microwaves and Radar Institute of the German Aerospace Center (DLR), carried out in cooperation with ETH Zurich and with the support of the Alfred Wegener Institute (AWI). It takes place in Greenland from mid-April to the end of May 2015 with the objective of collecting polarimetric-interferometric SAR data at different frequencies (X-, C-, S-, L- and P-band) over different facies of the ice sheet. The measurements are performed using DLR's airborne F-SAR sensor. In total, the activities involve five test sites and include the collection of ground measurements, like ground penetrating radar (GPR) profiles and snow and firn stratigraphy, as well as the installation of GPS stations and corner reflectors for the calibration of the SAR acquisitions. read more