First set of measurements from Solar Orbiter beamed back to Earth

Handout photo dated 09/02/20 issued by the ESA of the Atlas V 411 rocket, known as the Solar Orbiter, which lifted off into s
Handout photo dated 09/02/20 issued by the ESA of the Atlas V 411 rocket, known as the Solar Orbiter, which lifted off into space at 4am UK time on Monday.

The UK-built Solar Orbiter has successfully sent back its first scientific measurements since being launched into space last week.

Data from the on-board magnetometer, built and led by Imperial College, reached the ground on Thursday, the UK Space Agency said.

The spacecraft was blasted towards the Sun on February 10, and hopes to unlock secrets about our star.

“We measure magnetic fields thousands of times smaller than those we are familiar with on Earth,” said Imperial College’s Tim Horbury, principal investigator for the magnetometer instrument.

“Even currents in electrical wires make magnetic fields far larger than what we need to measure.

“That’s why our sensors are on a boom, to keep them away from all the electrical activity inside the spacecraft.”

Space Orbiter – which was constructed by Airbus in Stevenage – took off in the Atlas V 411 rocket from Nasa’s Cape Canaveral site in Florida at just after 4am UK time on lift-off day.

The satellite will orbit the Sun, beaming back high-resolution photos and measuring the solar wind as part of the mission led by the European Space Agency (ESA) and partly funded by the UK Space Agency.

Solar Orbiter
(PA Graphics)

Ground controllers at the European Space Operations Centre in Darmstadt, Germany, switched on the magnetometer’s two sensors around 21 hours after lift-off.

One can be found near the end of the 14.4ft (4.4m) long boom, and the other close to the spacecraft itself.

The instrument recorded data before, during and after the boom was deployed, so that scientists can understand the influence of the spacecraft on measurements in the space environment.

Next, the instruments will have to be calibrated, with the scientific data being collected from mid-May.

It will take the Solar Orbiter about two years to reach the Sun, which scientists call the “cruising phase”.

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