September 3, 2019 — The prospect of monitoring every vessel at sea in real time has moved a step closer to reality as a new generation of surveillance satellites takes to the skies.
The satellites are being launched by a small number of private companies with the potential to transform the monitoring of marine fisheries. One of those companies is Capella Space, which will launch a constellation of 36 surveillance satellites into orbit starting in December, following successful trials with a pilot satellite.
Capella’s “minibar-sized satellites” are equipped with synthetic-aperture radar (SAR) sensors, which ping signals down to Earth and use the information bouncing back to generate radar images. Though radar pictures lack the detail of optical images and cannot currently be used to identify specific vessels, they can detect the presence of any ship in the ocean, day or night, whatever the weather.