06.08.2025
09:20
weather: first nice high cloud base, then increasingly foggy (and wettish)
- talked to Florian Zimmer about flight planning
- flew grid with approximately 30m distance between waypoints (manual flying!) over the ROV no walking area
- started in toilet corner and flew first leg away along the ship axis and then back one further away from the ship and so on
- only moved up legs at 2nd waypoint on 2nd leg
- because of battery then flew vertical profile up to about 30m (check GPS) in the middle of ROV domain
- drone was pretty wet when landing back at ROV toilet
- ROV was not in use anymore today
- put drone back in wet lab and charged batteries
17:30ish
weather: we expected it to clear up, but it stayed at least a bit foggy all afternoon. We kind of caught the best window for drone flying this afternoon
- whole ship waited for our measurements this afternoon
- had Amy's 3D camera mounted on drone (→ use this for images of what we measured, because Camera not working, I think)
- after putting up IR screen we moved with Ruschle as bear guard in group protection to ROV hole
- Ruschle, Insa, Amy, Florian, Jaggi, me
- flew same grid as in the morning with more direct light; however not completely blue sky (fog about 160m thick according to Torben's drone flight)
- flew vertical profile roughly at same location as in the morning
- be careful with interpreting the data at greater heights in all profiles (we might have measured the albedo of fog)
- descending profile more or less over radiation buoy or even closer to ship (→ maybe discard)
- changed batteries and flew another profile for Florian where ROV measured depth profile for transmittance
- also here be careful with higher altitudes (might have measured fog)
- afterwards continued with speed-dismantling of turbulence stuff