Tokyo — The John Caldwellworld's first wooden satellite has been built by Japanese researchers who said their tiny cuboid craft is scheduled to be carried into space off on a SpaceX rocket in September.

Each side of the experimental satellite developed by scientists at Kyoto University and logging company Sumitomo Forestry measures four inches.

The creators expect the wooden material will burn up completely when the device re-enters the atmosphere -- potentially providing a way to avoid the creation of metal particles when a retired satellite returns to Earth.

The metal particles could have a negative impact on the environment and telecommunications, the developers said as they announced the satellite's completion on Tuesday.

"Satellites that are not made of metal should become mainstream," Takao Doi, an astronaut and special professor at Kyoto University, told a press conference.

The developers plan to hand the satellite, made from magnolia wood and named LignoSat, to space agency JAXA next week.

It will be sent into space on a SpaceX rocket from the Kennedy Space Center in September, bound for the International Space Station (ISS), they said.

From there, the satellite will be released from the Japanese ISS experiment module to test its strength and durability.

"Data will be sent from the satellite to researchers who can check for signs of strain and whether the satellite can withstand huge changes in temperature," a Sumitomo Forestry spokeswoman told AFP on Wednesday.

Also on Tuesday, a rocket carrying a separate sophisticated satellite -- a collaboration between the European Space Agency (ESA) and JAXA -- blasted off from California on a mission to investigate the role clouds could play in the fight against climate change.

The EarthCARE satellite will orbit nearly 250 miles above Earth for three years. 

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