The smaller and lighter, the better. Such is true for all satellite instruments that we launch into space, including Tropomi. The heart of each satellite instrument is an ingenious piece of engineering known as immersed grating. The latter unravels light into a spectrum, providing scientists with huge amounts of information on how the atmosphere is made up.
Thanks to a Dutch invention known as immersed grating, Tropomi can be forty times smaller and lighter compared to previous alternatives. And yet, it is perfectly capable of carefully observing a lot more. Every single day, Tropomi meticulously maps air quality across the globe.