NASA's Cyclone Global Navigation Satellite System mission, or CYGNSS, was launched aboard Orbital ATK's Pegasus rocket XL.
The rocket was carried on the underside of the company's Stargazer L-1011 aircraft which deploys the Pegasus XL rocket in mid-flight.
"All CYGNSS satellites have been successfully deployed," Orbital ATK tweeted at 8:53 am (local time).
The USD 157 million satellites "will probe the inner core of hurricanes to learn about their rapid intensification," NASA said.
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