Part III - Intensive observations

Unmanned Aerial Vehicles

Introduction | Flying strategy | The UAS COST campaign

Flying strategy

Depending on the situation, several UASs may fly simultaneously, or one after the other. The flying strategy will also depend on the aircraft strategy, as both airplanes have to be combined securely in space and time. We can divide the flight strategy into three kinds: (1) horizontal exploration, (2) vertical structure exploration and (3) soundings. Repeated legs at same height and on same axis by the same UAS will give a very interesting information about the evolution of turbulence along this leg. So repeated missions along the day will be favoured.

(1) Vertical structure exploration

Corresponding to (and possibly simultaneously with) the aircraft vertical structure mission, there will be one mission with stacked legs: 2 to 3 UASs will fly together the same axis, one on top of each other. When the aircraft will be flying above, the 3 UASs will focus on the lowest atmosphere, below 2500 ft QNH, and will be able to extend their vertical exploration the rest of the time.

(2) Horizontal Exploration

Corresponding to (and possibly simultaneously with) the aircraft horizontal variability, there will be a second mission with parallel axis flown by 2 to 3 UASs together.
The SUMO can make dense horizontal exploration 60 above ground, with measurements of the surface temperature, allowing the mapping of surface temperature above the two super sites. SIRUS II, with the same kind of flight, will make very high resolution visible images of the surface from above. Multicopters will have similar flight strategy at smaller scale, flying a few m only above the ground. At the small scale heterogeneity site especially, the multicopter operated by the team of the University of Lippe (HSWOL) will fly transects over the square at selected levels (starting at 2m) and provide profiles below 100 m above ground level. The information that will be provided will be air temperature and humidity and surface temperature. This team will operate from June 27 to July 8.

(3) Sounding

SUMO UAS is able to make soundings up to the top of the TRA within 15-30 min. It will be one of the missions of the SUMO to make frequent soundings of the atmosphere.

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