Seacon AUV tests @sea and intense UAV ops @farm house

08 May 2014

Seacon AUV tests @sea and intense UAV ops @farm house

Joao Tasso transferring the Seacon AUV from the Diplodous prior to launch. Unlike the Xplore1, the Seacon's outer shell and the nose is more sensitive to being dropped from the ship, making its launch/recovery more complex. As an older (but reliable) vehicle this and another Seacon will be our backup to the Xplore even if their onboard battery life is only about 5 hours in comparison to nearly 24 hours for the Xplore.
Joao Tasso transferring the Seacon AUV from the Diplodous prior to launch. Unlike the Xplore1, the Seacon's outer shell and the nose is more sensitive to being dropped from the ship, making its launch/recovery more complex. As an older (but reliable) vehicle this and another Seacon will be our backup to the Xplore even if their onboard battery life is only about 5 hours in comparison to nearly 24 hours for the Xplore.
Seacon AUV in the water.
A view from the surface; a GOPRO camera on the Xplore captures the Algarve's warm environment along with the Diplodus.
Zé Pinto and João tracking the assets in the water after deployment.
A temperature profile from May 8th from the Xplore-1's CTD sensor indicating the warm 19+ deg C waters on the surface.
The owners of the property just opposite the farm house, which is our shore base, with their horses and dogs. They've been extremely gracious in letting us use their property.
Joel and João Pereira during the intensive day long UAV campaign from the farm house. The spurt of UAV activity was to alleviate concerns about behind testing the aerial vehicles and their associated support software. Consequently a lot was accomplished especially with testing the deliberative T-REX controller which synthesizes and executes plans from the UAV ground station onboard the vehicle.
Francisco Lopez of UPCT, Cartagena recruited to support our (very advanced!) UAV landing system.
Landing in the net is always a challenge; remember the UAV has no wheels. But our friendly mascot, Cookie the host's dog is always there to provide both support and an incentive (to retrieve it before she does).
But the flimsy netting definitely takes a pounding. So Joel, our all in one pilot stands down to repair it, before continuing on.
Dinner time...at O Ciclista again, with nearly the entire operations team in attendance. From left to right: Artur Zolich, Ricardo (Joel) Gomes, Joao Pereira, Kanna Rajan, Ana Couta, Joao Fortuna, Lara Sousa, Margarida Faria (standing), Javier Gilabert, Nuno Quiroz, Frederic Py, Joao Tasso Sousa, Francesco Lopez and Ze Pintto. Missing Reanto Caldes, Marina Oliveira and Frederik Leira.

Thursday 8th saw more testing, as before at sea and at the farm house. At sea, the backup Seacon AUV was launched, tested with T-REX and recovered with a complex procedure involving a small spare boat with people in the water. Not ideal, but necessary given the Seacon, an older and less robust vehicle, is sensitive to being launched from the deck (see May 7th entry). The Xplore was also tested with large 1 km X 1 km surveys around the Diplodus. Altogether things went very well for the crew out on the ship with minor excitement when the spare boat was being towed by the Diplodus instead of being hauled onboard.

On the farm, things were intense given the feeling that the UAV team still had a lot to accomplish to get to the start of the experiment Monday. Work started with an earlier run in the morning, around 9.15am and by noon the group had accumulated 4 flights essentially validating bug fixes for the DUNE low-level controller sitting on top of the ARDUPilot autopilot of the X8.

T-REX was also used for loitering the UAV, something we had already demonstrated in our REP-13 exercises last July. But it was good to see the deliberate controller on a laptop on the ground controlling a UAV in the air (to the best of our knowledge this is the only such deliberate Planning/Execution system for a UAV anywhere; that the same system controls an AUV is novel and unique). Flight tests continued through the afternoon heat into late evening, finally wrapping up at 7.30pm. Our lone Pilot who has full control of the UAV on launch and recovery, was undoubtedly exhausted.

One very happy news was the clearance of the WaveGlider electronics box from Portuguese customs near Porto. This was a major accomplishment (no kidding) and we have Paulo Lopes (now better known as 'Paulo the Magnificent'), FEUP administrative support, to thank for his persistence. The box was shipped by bus to arrive the next morning in Faro for pick up. With this box, we intend to assemble it into the WG and get ready to (finally) deploy the vehicle complementing our triad of aerial, surface and underwater vehicles in operation. Of course the real challenge to come, next week, is to make them work together. But thats what this experiment is all about!

We returned to a quiet meal at the local restaurant down the road where we also had the debrief there, since the AUV team arrived late from sea that day.  We were finally joined by our resident biologist Nuno Queiroz from CIBIO,