MethaneSAT was an American-New Zealand space mission in 2024–25. It was an Earth observation satellite that monitored and studied global methane emissions in order to combat climate change. The spacecraft carried a high performance spectrometer methane sensing system, which allowed high resolution measurements to be taken of global methane emissions from roughly 50 major regions across Earth. It was launched in March 2024 aboard SpaceX's Transporter 10 rideshare mission.