Creating Data Products from the ATLAS AUV
So, what happens to all of this data that we are collecting on the ATLAS?
After the AUV is retrieved from the water, the team begins downloading the data. This takes about half as long to download that it does to collect. For example, on Tuesday we collected about 11 hours of data and it took five and a half hours to download! Luckily this can happen overnight, once the team gets it started.
Usually the next day, while some of the team goes back out on the research vessel, Mark Story begins processing and refining the data to incorporate it into products that are more user-friendly, like maps and images.
Looking at some of the images is really interesting—some you get a feeling of what you’re looking at right away. For instance the team imaged one of the wrecks that is just outside of the Sanctuary boundaries—the W/H Gilbert. In the image you get a good sense of what the ATLAS is doing.
Mark explained to me that it was similar to shining a flashlight on an object in the dark. The side closest to the ATLAS is shown in white because it had the strongest response, while the shadowed area behind it had a weaker response.
Other images lead to more questions. Some of the survey area images are coming back with long stripes, or what we’ve been calling brush-strokes. We’re not sure yet what this means. Could it be from glaciers that were once here? Or is it from ships that were dragging something behind them? Or…aliens? Well, maybe not.
What ever they show, these images allow the team revise the survey strategy or shift gears quickly to prioritize, which areas might be “ground truthed” or looked at more extensively with shorter-range, higher-resolution side-scan sonars, SCUBA divers, or other experts.