Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Meteosat Satellites Atmospheric Composition Land Ocean Weather Data Metop Sentinel Tags Asia MODIS VIIRS AHI ASCAT GOME-2 Meteosat Second Generation (MSG) OLCI SEVIRI SLSTR SRAL Meteosat Third Generation (MTG) Sentinel-3 Africa NOAA EPS Europe S America Himawari Terra/Aqua SNPP ABI Polar Date 2018 2016 SHOW ALL Sort by Start Date Order Ascending Descending 2 results Case study January–December 2019 Image Library top ten for 2019 A look at our most popular case studies from 2019. Case study 19 March 2016 00:00–09:00 UTC and 22 April 05:42 UTC Frozen Lake Baikal Lake Baikal, the world's oldest and deepest freshwater lake, was still almost completely frozen in Spring 2016.