Carbon Mapper Imaging Spectrometer Delivered to Planet for Launch

Wednesday - September 20 2023, 10:27 UTC - 1 year ago

This month, a state-of-the-art imaging spectrometer was delivered to Planet for launch in early 2024, which will measure methane and carbon dioxide from space and be part of an effort by the nonprofit Carbon Mapper organization to collect data on greenhouse gas point-source emissions.

The instrument will enable the nonprofit organization Carbon Mapper to pinpoint and measure methane and carbon dioxide sources from space. A state-of-the-art imaging spectrometer, which will measure the greenhouse gases methane and carbon dioxide from space, moved closer to launch this month after being delivered to a clean room at Planet Labs PBC (Planet) in San Francisco. Designed and constructed by NASA’s Jet Propulsion Laboratory (JPL) in Southern California, this science instrument will be part of an effort led by the nonprofit Carbon Mapper organization to collect data on greenhouse gas point-source emissions. Built around technologies developed for NASA airborne campaigns and space missions, the Carbon Mapper imaging spectrometer will provide targeted data on "super-emitters" – the small percentage of individual sources responsible for a significant fraction of global methane and carbon dioxide emissions.

The Carbon Mapper coalition is a public-private effort led by the Carbon Mapper organization and its partners, including JPL, Planet, the California Air Resources Board, Rocky Mountain Institute, Arizona State University, and the University of Arizona. The instrument is an advanced imaging spectrometer that measures hundreds of wavelengths of light reflected by the Earth’s surface and absorbed by gases in the planet’s atmosphere. Different compounds – including methane and carbon dioxide – absorb different wavelengths of light, leaving a spectral "fingerprint" that the imaging spectrometer can identify. These infrared fingerprints, invisible to the human eye, can pinpoint and quantify strong greenhouse gas emissions and accelerate potential mitigation efforts. A technician slides the imaging spectrometer, which will measure methane and carbon dioxide from Earth orbit, into a thermal vacuum test chamber at JPL in July. Engineers use the chamber to subject the spectrometer to the extreme temperatures it will encounter in the vacuum of space.

On September 12, the spectrometer was delivered to Planet, where it is slated for integration into a Tanager satellite designed by the company. This is expected to take the next few months. The launch is scheduled for early 2024. Prior to its departure from JPL, the spectrometer was put through a series of critical tests to ensure that it could withstand the rigors of launch and the harsh conditions of space. Engineers subjected the spectrometer to intense vibrations similar to what it will endure atop a rocket blasting into orbit, as well as to the extreme temperatures it will experience in the vacuum of space. There was also an opportunity to use a sample of methane to test the completed instrument while it was in a vacuum chamber at JPL. The test was successful, with the imaging spectrometer producing a clear spectral fingerprint of methane. "We are thrilled to see the exceptional quality of the methane spectral signature recorded. This bodes well for the space measurement soon to follow," said Robert Green, the instrument scientist at JPL. "This delivery is a very exciting step for us as our team can now begin the final stage of integration for Carbon Mapper, putting us one step closer to finding and measuring these critical sources of emissions from space," said Peter Platzer, CEO of Planet.