Part III - Intensive observations

Unmanned Aerial Vehicles

Introduction | Flying strategy | The UAS COST campaign


The UASs have shown in the recent years their ability to probe the Atmospheric Boundary Layer. Some scientific teams have a relatively long experience and some others are coming now into this fastly growing field of activity. In BLLAST experienced and new teams will participate either during the whole campaign or in the special period at the end of the campaign.
The restriction of flying in sight limits the horizontal range of operation of the UASs. The Temporary Restricted Airspace (TRA) reserved for BLLAST covers Sites 1 and 2 and has a vertical extend of 7500 feet (see Figure below). The area is a 2.25 nm radius cylinder, centred on N 43°6'18", E 0°21'6", and of 7500 ft height a.g.l. However the maximum height that a UAS system can reach depends on the authorization provided by the French aviation authority and is a function mainly of the previous expertise of the operating team and of the flight hours of the platform. Besides, when aircrafts will be in operation over the area, UASs will be restricted to fly below 2500 ft QNH feet and the aircratf above 3000 ft QNH. A coordinator of UASs operations will be in charge of organizing the flight schedule of UASs.

Three teams will operate during the whole campaign, those of the Universities of Tübingen (Bange/Kroonenberg), Braunschweig (Martin/Aschenbrenner) and Bergen (Reuder/Jonassen). The first two are suited for flying relatively long well levelled legs, allowing for the computation of means and fluctuations, from which estimation of turbulent covariances can be obtained. The latter uses the small UAS SUMO, mainly used for profiling up to some thousands of meters, but lately also for flying legs at lower heights than the other two systems.
The last days of BLLAST comprise a special period for UASs testing and inter-comparison. The participating teams may contribute to the general objectives of the experiment. They will be centered in Site 1. A small multicopter and a fixed wing plane will be operated by the University of Lippe (HSOWL). The University of Bremen will use a fixed wing and may bring a multicopter. The University of Heidelberg will test their new plane intended to measure surface properties. Finally the Technical University of Zurich will test their new UMARS which will measure atmospheric variables and gases.
Below is a complete list of the UAS which will fly during BLLAST:

 instituteContact PIairframesmax. tow
1University of Bergen
Geophysical Institute
Joachim Reuder
++47 47381397
3 SUMO0.6 kg
2Technical University
Braunschweig Institute of Aerospace Systems
Sabrina Martin
1 M²AV5 kg
3University of Tübingen
Environmental Physics
Aline van den Kroonenberg
1 MASC5 kg
4University of Applied Sciences Ostwestfalen-Lippe
Department of Environmental Engineering and Applied Computer Sciences
Burkhard Wrengerd
octocopter1 kg
5University of Applied Sciences BremenHeinrich Warmers
1 Fun-Jet 0.6 kg
6ENACCatherine Ronfle-Nadaud
1 quadrotor 0.45 kg
7University of Heidelberg
Institute of Environmental Physics
Cornelius Claussen
+49 175 6944518
1 SiriusII or 1 Multiplex Mentor<5kg


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