NASA reveals the way it saved an area digital camera 595 million kilometres away from Earth, close to Jupiter

Millions of kilometres from Earth, orbiting the large Jupiter, NASA’s Juno spacecraft confronted a major problem. One of its cameras, referred to as JunoCam, began to fail after being broken by Jupiter’s intense radiation. The staff managing the mission had restricted methods to repair the difficulty from so far-off. But they got here up with a intelligent plan that introduced the digital camera again to life and allowed it to proceed sending precious photographs.

Dealing with a tricky problem

JunoCam is positioned exterior a heavy radiation defend on the spacecraft. Jupiter’s radiation is among the many strongest in our photo voltaic system and it slowly damages devices like JunoCam. Initially, the digital camera labored nicely. It took clear photos in the course of the first 34 orbits, serving to scientists and the general public find out about Jupiter. But over time, the photographs began displaying issues like streaks and noise that made them laborious to make use of.

The engineers believed radiation broken an necessary a part of the digital camera’s energy provide. Without bodily repairing it, their choices have been very restricted. They determined to strive a way referred to as annealing. This concerned heating the digital camera to a hotter temperature than regular after which letting it settle down slowly. Heating can typically heal harm within the supplies that make up the digital camera, though this was a dangerous transfer with no assure of success.

Bringing JunoCam again

The staff turned up the digital camera’s heater to 25 levels Celsius (77 levels Fahrenheit). After the heating and cooling course of, the digital camera’s photographs started to enhance. This gave hope simply weeks earlier than Juno’s necessary shut flyby of Io, certainly one of Jupiter’s moons identified for its volcanic exercise. As that flyby approached, the digital camera’s issues returned. The staff heated the digital camera once more, this time extra aggressively. At first, the outcomes appeared disappointing. But simply within the closing days earlier than the flyby, the photographs dramatically improved once more. JunoCam was capable of seize detailed photos of Io’s floor, displaying icy mountains lined in sulfur dioxide and fields of flowing lava from volcanoes. These clear photographs have been near the standard the digital camera had when it first launched.

Importance for future missions

Since this success, the staff has used comparable heating strategies on different elements of the spacecraft. Juno’s mission has now accomplished greater than 70 orbits of Jupiter, every time dealing with radiation. The classes realized about repairing and defending devices will assist future missions, not solely these exploring distant planets but additionally satellites orbiting the Earth. Scott Bolton, Juno’s lead investigator, believes these strategies will likely be necessary for a lot of spacecraft sooner or later, as acknowledged in a NASA weblog.