In February 2018, the Spanish Paz satellite joined Airbus Defence and Space’s SAR satellite constellation, reducing the constellation’s revisit time from 11 days to between four and seven. This image shows changes over time at Barra de Tijuca Olympic Park in Rio de Janero, Brazil. Credit: Airbus

Article was corrected May 28 at 11:35 am Eastern time. Airbus has two Pleiades and two Spot satellites.

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Debra Werner is a correspondent for SpaceNews based in San Francisco. Debra earned a bachelor’s degree in communications from the University of California, Berkeley, and a master’s degree in Journalism from Northwestern University. She is a recipient...