Beacons

Sensor FunctionSampling frequencyData
Track
Argos Beacon10 locations per day, precision 2-10 kmDate + location
GPS (fast-location)Continuous, one location between each dive, precision 50 mDate + location
Physics
CTD- Head0.5 Hz, continuousTemperature, Salinity and Pressure (<2000m)
Hydrophone15s acoustic recording per dive, continuousWind speed
3D Accelerometer and Magnetometer50 Hz, continuousWaves frequency & amplitude, wind speed & direction
Biogeochemistry
Photodiode0.5 Hz, continuousChl-a profile
MultiSpectralFluorimeter4 dives/day, 1 Hz3 λ Chl profiles (in situ PFG : Diatom vs Non- Dpk)
Oxygen sensor4 dives/day, 1HzDissolved oxygen
3D Accelerometer and Magnetometer50 Hz, continuousWaves frequency & amplitude, wind speed & direction
Biology
Hydrophone15s acoustic recording per dive, continuousBiophony
Micro-SonarContinuous during dive for 15 to 100% of the dives depending on foraging trip durationMTL size & density profiles
Camera ( to be developed in SOS-BIO)MTL taxonomic composition
3D Accelerometer and Magnetometer50 Hz, continuousPrey catch events, swimming effort, dive trajectory
Photodiode0.5 Hz, continuous50 Hz, continuous
High Sensitivity50 Hz, continuousBioluminescence : duration & amplitude
Femelle éléphant de mer équipée de 3 balises afin d’étudier son trajet post-reproduction d’une durée de 2 mois. Les balises seront récupérées par les scientifiques la prochaine fois que l’animal reviendra à terre pour sa mue, cela permettra de télécharger les données hautes fréquences