Why the World Needs Yet Another Methane Satellite

Yet another methane satellite is launching into orbit Friday, as early as 11:19 a.m. Pacific time, on a SpaceX rocket. Developed by a coalition of public and private partners and led by the nonprofit Carbon Mapper, its precision imaging helps fill a gap in the methane detection universe and complements the abilities of MethaneSAT, the Environmental Defense Fund-developed, Google-backed satellite launched back in March.

Riley Duren, CEO of Carbon Mapper, likens his company’s satellite to a telephoto lens, saying it “has a resolution that's about 10 times higher than the MethaneSAT instrument” — although the tradeoff is that the field of view is about 10 times smaller. The ultimate goal is to identify “super-emitters” of methane and carbon dioxide at the facility level. So while MethaneSAT can detect the total emissions emanating from a particular basin, state, or country, Carbon Mapper can zoom in to figure out what’s going on within 50 meters of accuracy so that operators and regulators can be notified.

Both companies use an imaging technology known as spectroscopy, which involves splitting the light reflected by Earth’s surface into its constituent wavelengths. Methane and carbon dioxide each have their own spectroscopic signature. “It's not unlike being able to perceive the distinction in human fingerprints,” Duren told me.

The Carbon Mapper Coalition satellite, called Tanager-1, came from a partnership between Planet Labs, which developed the satellite, and NASA’s Jet Propulsion Laboratory, which developed the particular spectrometer used onboard. Duren helped create the tech during his nearly 28-year career at JPL, where his research revealed the outsized importance of super-emitters . That helped inspire Duren to found Carbon Mapper in 2020, though until now the organization has mostly done suborbital aerial surveys to track methane and carbon dioxide emissions.

Promisingly, he’s found that distributing his team’s findings often leads to a rapid response. “When we've shared our data with oil and gas companies, landfill operators, and regulators, what they tell us is nearly half of the emissions that we're reporting were previously unknown,” Duren told me. “And in many cases, they can quickly repair them.”

The data from these surveys is publicly accessible on the Carbon Mapper data portal , and the data from Tanager-1 will be published there as well. In addition to Planet Labs and JPL, other coalition partners include the California Air Resources Board, University of Arizona, Arizona State University, and RMI. To date, Carbon Mapper has raised over $130 million in philanthropic funding, from donors including the High Tide Foundation, Bloomberg Philanthropies, and the Grantham Foundation for the Protection of the Environment.

Ultimately, Carbon Mapper aims to launch a constellation of more than 10 satellites, which together will detect and track up to 90% of high-emitting methane sources with near-daily frequency. But this will require funding beyond what the philanthropic sector is likely to pony up.

“Scaling up this to the full constellation and sustaining it will hinge on the ability of governments and the private sector to pay for data,” Duren told me. (MethaneSAT is also philanthropically supported.) “We're hopeful that as these programs scale up and we demonstrate their utility and the regulators depend on them, that we'll see governments begin to match what philanthropy has started,” Durian said.

If you want to watch the launch live, you can do so here .

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