Tuesday 06/07/2021
was the fifth data acquisition for PLP2021. Sentinel 2 multispectral data of
both the two large area targets (HDPE mesh and wooden plank/natural debris
simulator) were acquired, along with very high resolution images from a DJI
Phantom pro v4 drone. Hyperspectral data were acquired using an Oceanoptics
Flame mini spectroradiometer. Metadata collection included wind speed and
direction, incident light intensity and turbidity using a Secchi disk. Visual
inspection of the targets did reveal some minor damage to the wooden target,
which will be repaired in the coming acquisition day. Biofouling accumulation
is becoming denser, covering larger areas of the HDPE target. The algae growth
is denser in areas of the target that are continually submerged and seems to increase
with depth of submersion. Conditions were calm with low winds, no cloud cover
over the deployment area and a clear atmosphere.
