Second BUBBLES Workshop “Presenting validation results towards an updated concept of separation management”.

30  Nov 2021 – PRESS RELEASE


Last Thursday took place the Second BUBBLES workshop organised by our technical board. Although we were willing to meet you face-to-face, it had to be held as an online event due to the unstable situation caused by COVID19. Despite this, it was a very productive session focused on presenting the validation results of the separation management concept developed by BUBBLES, with about 50 attendees.

The workshop consisted of a first session focused on presenting a BUBBLES updated ConOps overview, a second one about BUBBLES OSED & SPR, a third one where some preliminary validation results were presented and a last session consisting of an open discussion.

The first session began with the update of the concept of BUBBLES presented by Juan Vicente Balbastre, BUBBLES Project Manager, highlighting how BUBBLES envisages the application of the separation provision process described in the ICAO Doc. 9854 to UAS and how this led to the concept of separation management.

Next, Norberto Vera (UPV) presented a study to determine the Target Level of Safety (TLS) in terms of traffic density, mix of traffic and the shape of the safety bubble surrounding UASs. The effect of allocating vertical layers to certain classes of traffic on the global TLS was also addressed.

The second session was presented by Cecilia Claramunt and Juan Vicente Balbastre, both from UPV, who described the steps carried out by the BUBBLES team to define the OSED and SPR. They were defined following MEDUSA methodology and considering the concept of operation of CORUS, the process outlined in EUROCAE ED-78A and inspired by the EUROCONTROL GEN-SUR SPR standard.

The third session, validation results, began with the description of the validation plan by Cecilia Claramunt (UPV). Then, Pablo Morcillo (UPV) presented the results supporting the validation of the collision model for calculating separation developed by the project team, whereas Damiano Brunori, from La Sapienza University, presented the results of updating the separation minima applying AI. Finally, Tiago Cruz from Universidade de Coimbra, presented the system implementation that will be used to validate the SPR proposed by the project.

The open discussion session began after the technical presentations. The main part of the discussion focused on the values of separation minima. In addition to the open discussion, after each presentation there was a Q&A where other topics were discussed. As an example of separation minima obtained by BUBBLES project is presented the following table. It is worth highlighting that those values were obtained for the first phase of validation separation management concept, so they must be considered as provisional figures of separation minima, but not as the definitive ones proposed by BUBBLES.

Click here to download the slides used during the BUBBLES workshop.