Finished! Looks like this project is out of data at the moment!
CloudCatcher will be featured on the Science Scribbler Twitch Channel! Go to https://www.twitch.tv/sciencescribbler
Also, this project recently migrated onto Zooniverse’s new architecture. For details, see here.
Spot the clouds in satellite images to help us validate our computer generated cloud detector.
Learn moreSo you think you are a lean, mean, cloudspotting machine? Try 'You Cannot Be Cirrus!', our new workflow that shows the Earth in a different light. Go global to view images from around the world, or view scenes from the UK.
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Message from the researcher
When I'm looking at these beautiful satellite images on my computer, I think I could actually be sitting in the ISS staring out the window! The research that we do is helping to improve our understanding of the Earth's climate.
caroline_coxAbout CloudCatcher
We love seeing clouds in our satellite images. They look beautiful. But if you are interested in making measurements of the surface you need a clear view of it. Clouds can spoil our data and so they need to be identified in the images so we know which pixels to discard. To do this, we have an automated ‘cloud mask’ which identifies which of the image pixels are likely to contain cloud. Often the cloud mask gets it right, but no cloud mask is perfect and there are times when cloudy pixels are missed, or indeed clear sky gets falsely flagged as cloud. It is important to understand how well we are doing at identifying this cloud, which is actually tricky to do.
We ask the question, just how accurate is our cloud mask? Help us to answer this by identifying the clouds in the images. You are so much better at catching clouds than our computers are, so we could really use your help.